LDD Series: DC-DC Step-down (Buck) Constant Current LED Driver ， LDDS Series: Step-down Constant Current LED Driver

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-350LS

  LDD-350LS — Constant-current DC/DC LED driver MEAN WELL LDD-350LS is a 350 mA constant-current DC/DC step-down LED driver in SMD style. It accepts 9–32 VDC and drives an LED string within 2–28 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-350LS; LDD-L series; S suffix = SMD style. Constant output current 350 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–28 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–32 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 150 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC input. Full-load input current 350 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +85°C and ends at that temperature. Keep the operating case temperature within its separate limit. Maximum operating case temperature 100°C. Working humidity 20–85% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 25.4 × 10.5 × 9.3 mm (L × W × H), as specified for this construction. Unit mass 3.4 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control pin assignments Bottom-view numbering: 1 = +Vin; 7 and 8 = +Vout; 9 and 10 = −Vout; 14 = PWM DIM; 16 = −Vin. Other positions are N.C. Leave unneeded DIM open and do not connect −Vin to −Vout. SMD layout Use the catalog’s recommended top-view PCB land pattern. Lead pitch is 2.54 mm; body width is 10.5 mm and the mechanical drawing shows 12.8 mm across the leads. The layout drawing gives 14.63 mm overall land-pattern span, 13.1 mm inner reference span and 1.54 mm pad dimensions. Encapsulation The LS construction is not potted. The catalog’s IP67 statement applies to pin and wire styles, not this SMD version. Hot-air reflow limits Only the LDD-300–700LS hot-air reflow profile applies: peak 240°C for at most 10 seconds and at most 60 seconds above 220°C. Follow the complete profile in the catalog; do not extend it to another soldering method. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Standard tube: 19 units, 100 g gross per tube; carton: up to 2,280 units, 12.8 kg gross. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-300LS

  LDD-300LS — Constant-current DC/DC LED driver MEAN WELL LDD-300LS is a 300 mA constant-current DC/DC step-down LED driver in SMD style. It accepts 9–32 VDC and drives an LED string within 2–28 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-300LS; LDD-L series; S suffix = SMD style. Constant output current 300 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–28 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–32 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 150 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC input. Full-load input current 300 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +85°C and ends at that temperature. Keep the operating case temperature within its separate limit. Maximum operating case temperature 100°C. Working humidity 20–85% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 25.4 × 10.5 × 9.3 mm (L × W × H), as specified for this construction. Unit mass 3.4 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control pin assignments Bottom-view numbering: 1 = +Vin; 7 and 8 = +Vout; 9 and 10 = −Vout; 14 = PWM DIM; 16 = −Vin. Other positions are N.C. Leave unneeded DIM open and do not connect −Vin to −Vout. SMD layout Use the catalog’s recommended top-view PCB land pattern. Lead pitch is 2.54 mm; body width is 10.5 mm and the mechanical drawing shows 12.8 mm across the leads. The layout drawing gives 14.63 mm overall land-pattern span, 13.1 mm inner reference span and 1.54 mm pad dimensions. Encapsulation The LS construction is not potted. The catalog’s IP67 statement applies to pin and wire styles, not this SMD version. Hot-air reflow limits Only the LDD-300–700LS hot-air reflow profile applies: peak 240°C for at most 10 seconds and at most 60 seconds above 220°C. Follow the complete profile in the catalog; do not extend it to another soldering method. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Standard tube: 19 units, 100 g gross per tube; carton: up to 2,280 units, 12.8 kg gross. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-700LW

  LDD-700LW — Constant-current DC/DC LED driver MEAN WELL LDD-700LW is a 700 mA constant-current DC/DC step-down LED driver in wire style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-700LW; LDD-L series; W suffix = wire style. Constant output current 700 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 200 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 700 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +71°C and ends at that temperature. The common specification lists −40°C to +85°C, but the 600–1,000 mA curve limits this model to +71°C. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 7.3 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin (red); 3 = PWM DIM (white); 4 = −Vin (black); 5 = −Vout (blue); 6 = +Vout (yellow). Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Wire specification All leads are UL3385, 22 AWG. The drawing specifies 100 ±10 mm lead length and 5 ±2 mm stripped ends. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Box: 48 units, 430 g gross; carton: up to 576 units, 5.96 kg gross. The shown box is 220 × 195 × 45 mm. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-600LW

  LDD-600LW — Constant-current DC/DC LED driver MEAN WELL LDD-600LW is a 600 mA constant-current DC/DC step-down LED driver in wire style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-600LW; LDD-L series; W suffix = wire style. Constant output current 600 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 200 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 600 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +71°C and ends at that temperature. The common specification lists −40°C to +85°C, but the 600–1,000 mA curve limits this model to +71°C. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 7.3 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin (red); 3 = PWM DIM (white); 4 = −Vin (black); 5 = −Vout (blue); 6 = +Vout (yellow). Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Wire specification All leads are UL3385, 22 AWG. The drawing specifies 100 ±10 mm lead length and 5 ±2 mm stripped ends. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Box: 48 units, 430 g gross; carton: up to 576 units, 5.96 kg gross. The shown box is 220 × 195 × 45 mm. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-500LW

  LDD-500LW — Constant-current DC/DC LED driver MEAN WELL LDD-500LW is a 500 mA constant-current DC/DC step-down LED driver in wire style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-500LW; LDD-L series; W suffix = wire style. Constant output current 500 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 150 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 500 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +85°C and ends at that temperature. Keep the operating case temperature within its separate limit. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 7.3 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin (red); 3 = PWM DIM (white); 4 = −Vin (black); 5 = −Vout (blue); 6 = +Vout (yellow). Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Wire specification All leads are UL3385, 22 AWG. The drawing specifies 100 ±10 mm lead length and 5 ±2 mm stripped ends. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Box: 48 units, 430 g gross; carton: up to 576 units, 5.96 kg gross. The shown box is 220 × 195 × 45 mm. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-350LW

  LDD-350LW — Constant-current DC/DC LED driver MEAN WELL LDD-350LW is a 350 mA constant-current DC/DC step-down LED driver in wire style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-350LW; LDD-L series; W suffix = wire style. Constant output current 350 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 150 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 350 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +85°C and ends at that temperature. Keep the operating case temperature within its separate limit. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 7.3 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin (red); 3 = PWM DIM (white); 4 = −Vin (black); 5 = −Vout (blue); 6 = +Vout (yellow). Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Wire specification All leads are UL3385, 22 AWG. The drawing specifies 100 ±10 mm lead length and 5 ±2 mm stripped ends. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Box: 48 units, 430 g gross; carton: up to 576 units, 5.96 kg gross. The shown box is 220 × 195 × 45 mm. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-300LW

  LDD-300LW — Constant-current DC/DC LED driver MEAN WELL LDD-300LW is a 300 mA constant-current DC/DC step-down LED driver in wire style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-300LW; LDD-L series; W suffix = wire style. Constant output current 300 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 150 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 300 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +85°C and ends at that temperature. Keep the operating case temperature within its separate limit. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 7.3 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin (red); 3 = PWM DIM (white); 4 = −Vin (black); 5 = −Vout (blue); 6 = +Vout (yellow). Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Wire specification All leads are UL3385, 22 AWG. The drawing specifies 100 ±10 mm lead length and 5 ±2 mm stripped ends. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Box: 48 units, 430 g gross; carton: up to 576 units, 5.96 kg gross. The shown box is 220 × 195 × 45 mm. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-700L

  LDD-700L — Constant-current DC/DC LED driver MEAN WELL LDD-700L is a 700 mA constant-current DC/DC step-down LED driver in pin style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-700L; LDD-L series; blank suffix = pin style. Constant output current 700 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 200 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 700 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +71°C and ends at that temperature. The common specification lists −40°C to +85°C, but the 600–1,000 mA curve limits this model to +71°C. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 4 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin; 3 = PWM DIM; 4 = −Vin; 5 = −Vout; 6 = +Vout. Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Pin geometry Pin diameter 0.60 mm, tolerance ±0.05 mm. Drawing references: 2.54 mm pitch, 7.62 mm row spacing, 17.78 mm longitudinal pin spacing and 3.81 mm pin projection. Use the bottom-view orientation shown in the catalog. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Standard tube: 50 units, 280 g gross per tube; carton: up to 2,500 units, 14.8 kg gross. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-600L

  LDD-600L — Constant-current DC/DC LED driver MEAN WELL LDD-600L is a 600 mA constant-current DC/DC step-down LED driver in pin style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-600L; LDD-L series; blank suffix = pin style. Constant output current 600 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 200 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 600 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +71°C and ends at that temperature. The common specification lists −40°C to +85°C, but the 600–1,000 mA curve limits this model to +71°C. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 4 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin; 3 = PWM DIM; 4 = −Vin; 5 = −Vout; 6 = +Vout. Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Pin geometry Pin diameter 0.60 mm, tolerance ±0.05 mm. Drawing references: 2.54 mm pitch, 7.62 mm row spacing, 17.78 mm longitudinal pin spacing and 3.81 mm pin projection. Use the bottom-view orientation shown in the catalog. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Standard tube: 50 units, 280 g gross per tube; carton: up to 2,500 units, 14.8 kg gross. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-500L

  LDD-500L — Constant-current DC/DC LED driver MEAN WELL LDD-500L is a 500 mA constant-current DC/DC step-down LED driver in pin style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-500L; LDD-L series; blank suffix = pin style. Constant output current 500 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 150 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 500 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +85°C and ends at that temperature. Keep the operating case temperature within its separate limit. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 4 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin; 3 = PWM DIM; 4 = −Vin; 5 = −Vout; 6 = +Vout. Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Pin geometry Pin diameter 0.60 mm, tolerance ±0.05 mm. Drawing references: 2.54 mm pitch, 7.62 mm row spacing, 17.78 mm longitudinal pin spacing and 3.81 mm pin projection. Use the bottom-view orientation shown in the catalog. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Standard tube: 50 units, 280 g gross per tube; carton: up to 2,500 units, 14.8 kg gross. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-350L

  LDD-350L — Constant-current DC/DC LED driver MEAN WELL LDD-350L is a 350 mA constant-current DC/DC step-down LED driver in pin style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-350L; LDD-L series; blank suffix = pin style. Constant output current 350 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 150 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 350 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +85°C and ends at that temperature. Keep the operating case temperature within its separate limit. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 4 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin; 3 = PWM DIM; 4 = −Vin; 5 = −Vout; 6 = +Vout. Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Pin geometry Pin diameter 0.60 mm, tolerance ±0.05 mm. Drawing references: 2.54 mm pitch, 7.62 mm row spacing, 17.78 mm longitudinal pin spacing and 3.81 mm pin projection. Use the bottom-view orientation shown in the catalog. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Standard tube: 50 units, 280 g gross per tube; carton: up to 2,500 units, 14.8 kg gross. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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  MEAN WELL LDD-L series: DC/DC step-down constant-current LED driver - LDD-300L

  LDD-300L — Constant-current DC/DC LED driver MEAN WELL LDD-300L is a 300 mA constant-current DC/DC step-down LED driver in pin style. It accepts 9–36 VDC and drives an LED string within 2–32 VDC, with the output at least 3 V below the input. PWM control provides dimming and remote on/off. Download MEAN WELL LDD-L Datasheet (PDF)LDD-L specifications and drawings are in catalog pages 1–9. Follow the applicable model and construction. Output and input specifications Parameter Details Complete model / construction LDD-300L; LDD-L series; blank suffix = pin style. Constant output current 300 mA. Match the LED module’s current rating to this fixed-current driver. LED output-voltage window 2–32 VDC. Select the total LED forward voltage within this window and at least 3 V below the DC input; the module steps down rather than boosts the input. DC input range 9–36 VDC. Typical current accuracy ±5% at 24 VDC input. Maximum ripple and noise 150 mVp-p; measured with 20 MHz bandwidth and a 12-inch twisted pair terminated by a 0.1 µF capacitor. Switching frequency 40–1,000 kHz. Maximum external capacitive load 2.2 µF. Maximum efficiency 95% at full load and 24 VDC or 36 VDC input. Full-load input current 300 mA at 24 VDC input; catalog test condition. No-load input current 5 mA. Input filter Capacitor filter; built-in EMI filtering. The catalog specifies BS EN/EN 55015 and FCC Part 15 compliance without an additional input filter or capacitors. Reference measurement conditions Unless otherwise stated: 24 VDC input, rated load, 25°C ambient and 70% RH. Efficiency curves Efficiency varies with input voltage and the LED string voltage. Catalog examples use 3 V forward voltage per LED at 12, 24 and 36 VDC input; these examples do not extend this model’s specified input or output limits. Dimming and control Parameter Details Control reference DIM voltage is measured relative to −Vin. Leave DIM open if unused. Do not connect −Vin to −Vout. PWM dimming and on/off High level above 3.5 V and up to 8 V, or an open control, enables output. A level below 0.5 V or a short to −Vin turns output off. PWM frequency: 100 Hz–1 kHz. PWM output characteristic During PWM dimming the output current becomes a pulsed waveform. The catalog duty-cycle/current plot is approximately proportional over 0–100% duty, with ±3% typical tolerance. Shutdown input current 1 mA maximum with PWM dimming OFF at 24 VDC input. Protection and environment Parameter Details Short-circuit protection Output is regulated at rated current during a short circuit. The fault condition can be sustained, and normal operation recovers automatically after the fault is removed. Overtemperature protection The main control IC detects a junction temperature of typically 150°C and shuts down; output recovers automatically after the temperature falls. This is an IC junction threshold, not an ambient-temperature rating. Cooling and ambient limits Free-air convection. The derating chart permits full load from −40°C to +85°C and ends at that temperature. Keep the operating case temperature within its separate limit. Maximum operating case temperature 100°C. Working humidity 20–90% RH, non-condensing. Storage conditions −55°C to +125°C; 10–95% RH. Temperature coefficient ±0.03%/°C. Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes. Connections and installation Parameter Details Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H), as specified for this construction. Unit mass 4 g, catalog weight per unit; not the gross weight of a packing tube or carton. Power and control connections Bottom-view positions: 1 = +Vin; 3 = PWM DIM; 4 = −Vin; 5 = −Vout; 6 = +Vout. Connect LEDs between +Vout and −Vout. Do not connect −Vin to −Vout. Pin geometry Pin diameter 0.60 mm, tolerance ±0.05 mm. Drawing references: 2.54 mm pitch, 7.62 mm row spacing, 17.78 mm longitudinal pin spacing and 3.81 mm pin projection. Use the bottom-view orientation shown in the catalog. Encapsulation Epoxy potting, UL94-V0; fully encapsulated IP67 construction as specified for pin and wire styles. DC wiring restriction Do not connect the output to the input of the same unit or to the output of another source. Keep the LED output return separate from −Vin. Standards and reference information Parameter Details Safety / EMC references EAC TP TC 020/2011 approval. Emissions: BS EN/EN 55015, FCC Part 15 Class B and EAC TP TC 020. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level, criterion A; EAC TP TC 020. MTBF At least 1,000,000 hours according to MIL-HDBK-217F at 25°C; a reliability calculation, not a guaranteed operating lifetime. Applications and warranty Designed to drive illumination LEDs. The manufacturer’s catalog states a 3-year warranty; applicable manufacturer terms govern this statement. Packing reference Standard tube: 50 units, 280 g gross per tube; carton: up to 2,500 units, 14.8 kg gross. Outer carton reference: 620 × 230 × 230 mm. Packing dimensions and gross masses are separate from the product dimensions and unit mass.

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