MEAN WELL LDH-45 series: DC/DC step-up constant-current LED driver - LDH-45A-500DA

Description

LDH-45A-500DA DC/DC LED driver

MEAN WELL LDH-45A-500DA is a fully encapsulated DC/DC step-up constant-current LED driver with 500 mA rated output, a 24–86 VDC LED operating window and 43 W rated power. This pin-style version uses 9–18 VDC input and provides DALI dimming. Select the LED string so its voltage stays within the stated window and is at least 12 V above the actual input voltage.

Download MEAN WELL LDH-45 Datasheet (PDF)

Combined catalog pages 7–11; LDH-45 revision 2024-10-16.

Output and model selection

Complete model / series LDH-45A-500DA / LDH-45. A selects the 9–18 VDC input range. DA: pin style with DALI dimming.
Rated current / power 500 mA constant current / 43 W. Keep voltage, current and power within their stated limits together.
LED output-voltage window 24–86 VDC for this DALI version.
Required step-up margin Output voltage must exceed the actual DC input by at least 12 V, as required by specification note 2. This condition applies in addition to the tabulated LED-voltage window.
Maximum no-load voltage 100 V.
Typical current accuracy ±5% at 12 VDC input.
Maximum ripple and noise 2.5 Vp-p. Measurement: 20 MHz bandwidth, a 12-inch twisted pair, and a parallel 0.1 µF termination capacitor.

Input and performance

DC input / reference voltage 9–18 VDC operating range; 12 VDC rated/reference input. Observe input polarity and the load limits below.
Typical input current 4.1 A at the catalog reference conditions.
Efficiency specification / plots The specification table lists 90% in its “EFFICIENCY (max.)” row. Page 10 separately plots the LDH-45A-500 example at 12 VDC input and LED Vf = 3.33 V; those illustrative curves vary with LED count and can show higher local values. Use the table entry as the stated specification; the example peaks are not a guaranteed efficiency for every load or suffix.
Input-voltage loading A-input curve: 75% load at 9 VDC, rising to 100% at 12 VDC; 100% from 12 to 18 VDC.
Polarity / wiring voltage drop Connect positive and negative input terminals correctly. Do not apply negative input voltage. Account for the voltage drop of the supply wiring at the operating input current.
Reference measurement conditions Unless otherwise stated: normal 12 VDC input, rated load, +25°C and 70% RH ambient.

Dimming and operating control

DALI interface Use the DA+ and DA− connections for DALI control. The catalog specifies 16 groups and 64 addresses.
DALI dimming range Minimum dimming level is about 8% of output. The catalog refers the DALI characteristic to the illustrated 10 kHz curve; do not interpret this as an external PWM input on the DA version.
DALI connection positions Position 3 = DA−; position 4 = DA+. Position 5 is absent on the DA version. Use the dedicated DALI wiring diagram.
Dim-off residual output voltage At dim-off, the output voltage drops to the input-voltage level. For complete darkness, select a luminaire that remains off when driven at that input voltage; dim-off does not mean a zero-volt output.

Protection and environment

Short-circuit protection The catalog specifies “Power OFF and fuse open.” No automatic short-circuit recovery is specified.
Maximum overvoltage protection 100 V. Protection holds a constant output voltage and shuts off output current; it recovers automatically after the fault is removed.
Undervoltage protection Undervoltage protection is listed among the series features. No separate trip threshold or recovery value is specified in this catalog; operate within the stated input range.
Cooling / ambient limits Free-air convection. The shared specification gives −40 to +70°C, subject to the derating graph. For this A-input branch, the 100% load curve extends from −40 to +60°C and ends there. The A curve does not authorize operation from +60 to +70°C.
Humidity / storage Working humidity: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH.
Temperature coefficient ±0.03%/°C over 0–50°C.
Vibration 10–500 Hz, 2G; 10 minutes per cycle; 60 minutes along each of the X, Y and Z axes.

Connections and installation

Dimensions / construction 75 × 53 × 22.7 mm (L × W × H); fully encapsulated. Mechanical drawing tolerance: ±1 mm.
Input / output connections Bottom-view pins: 1 Vin+; 2 Vin−; 6 Vout−; 7 Vout+. Follow the numbered bottom-view drawing when designing the mating board. Do not connect Vin− to Vout−; connect the LED string to Vout+ and Vout−.
Control connections Pins: 3 DA−; 4 DA+; no pin 5.
Wire / pin dimensions Pin diameter: 1.0 mm ±0.05 mm; the side view shows 3.5 mm pin projection. Use the bottom-view drawing for exact pin coordinates.
Soldering limits Catalog maximums: wave soldering 265°C for 5 seconds; manual soldering 390°C for 3 seconds.
DC input polarity and wiring drop Connect the positive and negative DC input terminals correctly. Do not apply a negative input voltage. Account for voltage drop in the input wiring because the input current can be high.
Input and output separation Do not connect Vin- to Vout-. Follow the pin or lead-wire diagram for this exact model; identical wire colors do not make the input and output negative connections interchangeable.
Dim-off output voltage When dimmed off, the output voltage falls to approximately the input voltage. Complete darkness requires an LED string that remains off at that input voltage; dim-off is not a zero-output-voltage isolation state.
Battery and DC-bus EMC The catalogue states battery-source compliance with BS EN/EN 55015 without additional input filters or capacitors. A DC-bus source requires the model-specific additional EMC filter circuit shown in the catalogue.
Installation reference scope The catalogue links the general LED installation manual, whose family list does not explicitly name LDH. Use this DC model's specific pinout and application limits; the general manual does not establish AC wiring or circuit-breaker ratings for this unit.
Short-circuit limitation The specified short-circuit response is power off with the fuse open. Automatic short-circuit recovery is not specified.
DALI connection boundary Use the DA- and DA+ connections for this DALI version; pin 5 is absent. The catalogue lists 16 groups and 64 addresses, with a minimum dimming level of about 8%. The analogue and PWM input specifications belong to the non-DA version.
Output headroom The output must be at least 12 V above the DC input for this DALI version, within the model-specific output-voltage range.

Safety and reference information

Safety approvals LVD BS EN/EN 61347-1, BS EN/EN 61347-2-13, and EAC TP TC 004 approved. The DALI marking on the cover is specifically for DA types.
EMC emission / immunity Emission: BS EN/EN 55015 and EAC TP TC 020. Immunity: BS EN/EN 61547; BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level; EAC TP TC 020.
Battery / DC-bus EMC conditions For battery supply, the catalog states compliance with BS EN/EN 55015 without additional input filter and capacitors. For DC-bus supply, additional EMC filter components are required; follow the page 11 circuit and validate the complete installation.
Recommended EMC circuit Page 11 shows C1 = 47 µF across the DC-source lines, LF1 = 47 mH in the supply/input path, and LF2 = 10.4 mH between the controller and dimming connection.
MTBF 12195.2 thousand hours minimum: Telcordia SR-332 (Bellcore); 1179.3 thousand hours minimum: MIL-HDBK-217F at 25°C.
Unit mass / warranty 138 g, the catalog PACKING reference per unit; not a measured shipping-package weight. The catalog states a 3-year manufacturer warranty, subject to the manufacturer’s terms.
Download MEAN WELL LED Installation Manual (Catalog Reference)

MEAN WELL LDH-45 series: DC/DC step-up constant-current LED driver - LDH-45A-500DA

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LDH-45A-500DA DC/DC LED driver MEAN WELL LDH-45A-500DA is a fully encapsulated DC/DC step-up constant-current LED driver with 500 mA rated... Read more

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    Description

    LDH-45A-500DA DC/DC LED driver

    MEAN WELL LDH-45A-500DA is a fully encapsulated DC/DC step-up constant-current LED driver with 500 mA rated output, a 24–86 VDC LED operating window and 43 W rated power. This pin-style version uses 9–18 VDC input and provides DALI dimming. Select the LED string so its voltage stays within the stated window and is at least 12 V above the actual input voltage.

    Download MEAN WELL LDH-45 Datasheet (PDF)

    Combined catalog pages 7–11; LDH-45 revision 2024-10-16.

    Output and model selection

    Complete model / series LDH-45A-500DA / LDH-45. A selects the 9–18 VDC input range. DA: pin style with DALI dimming.
    Rated current / power 500 mA constant current / 43 W. Keep voltage, current and power within their stated limits together.
    LED output-voltage window 24–86 VDC for this DALI version.
    Required step-up margin Output voltage must exceed the actual DC input by at least 12 V, as required by specification note 2. This condition applies in addition to the tabulated LED-voltage window.
    Maximum no-load voltage 100 V.
    Typical current accuracy ±5% at 12 VDC input.
    Maximum ripple and noise 2.5 Vp-p. Measurement: 20 MHz bandwidth, a 12-inch twisted pair, and a parallel 0.1 µF termination capacitor.

    Input and performance

    DC input / reference voltage 9–18 VDC operating range; 12 VDC rated/reference input. Observe input polarity and the load limits below.
    Typical input current 4.1 A at the catalog reference conditions.
    Efficiency specification / plots The specification table lists 90% in its “EFFICIENCY (max.)” row. Page 10 separately plots the LDH-45A-500 example at 12 VDC input and LED Vf = 3.33 V; those illustrative curves vary with LED count and can show higher local values. Use the table entry as the stated specification; the example peaks are not a guaranteed efficiency for every load or suffix.
    Input-voltage loading A-input curve: 75% load at 9 VDC, rising to 100% at 12 VDC; 100% from 12 to 18 VDC.
    Polarity / wiring voltage drop Connect positive and negative input terminals correctly. Do not apply negative input voltage. Account for the voltage drop of the supply wiring at the operating input current.
    Reference measurement conditions Unless otherwise stated: normal 12 VDC input, rated load, +25°C and 70% RH ambient.

    Dimming and operating control

    DALI interface Use the DA+ and DA− connections for DALI control. The catalog specifies 16 groups and 64 addresses.
    DALI dimming range Minimum dimming level is about 8% of output. The catalog refers the DALI characteristic to the illustrated 10 kHz curve; do not interpret this as an external PWM input on the DA version.
    DALI connection positions Position 3 = DA−; position 4 = DA+. Position 5 is absent on the DA version. Use the dedicated DALI wiring diagram.
    Dim-off residual output voltage At dim-off, the output voltage drops to the input-voltage level. For complete darkness, select a luminaire that remains off when driven at that input voltage; dim-off does not mean a zero-volt output.

    Protection and environment

    Short-circuit protection The catalog specifies “Power OFF and fuse open.” No automatic short-circuit recovery is specified.
    Maximum overvoltage protection 100 V. Protection holds a constant output voltage and shuts off output current; it recovers automatically after the fault is removed.
    Undervoltage protection Undervoltage protection is listed among the series features. No separate trip threshold or recovery value is specified in this catalog; operate within the stated input range.
    Cooling / ambient limits Free-air convection. The shared specification gives −40 to +70°C, subject to the derating graph. For this A-input branch, the 100% load curve extends from −40 to +60°C and ends there. The A curve does not authorize operation from +60 to +70°C.
    Humidity / storage Working humidity: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH.
    Temperature coefficient ±0.03%/°C over 0–50°C.
    Vibration 10–500 Hz, 2G; 10 minutes per cycle; 60 minutes along each of the X, Y and Z axes.

    Connections and installation

    Dimensions / construction 75 × 53 × 22.7 mm (L × W × H); fully encapsulated. Mechanical drawing tolerance: ±1 mm.
    Input / output connections Bottom-view pins: 1 Vin+; 2 Vin−; 6 Vout−; 7 Vout+. Follow the numbered bottom-view drawing when designing the mating board. Do not connect Vin− to Vout−; connect the LED string to Vout+ and Vout−.
    Control connections Pins: 3 DA−; 4 DA+; no pin 5.
    Wire / pin dimensions Pin diameter: 1.0 mm ±0.05 mm; the side view shows 3.5 mm pin projection. Use the bottom-view drawing for exact pin coordinates.
    Soldering limits Catalog maximums: wave soldering 265°C for 5 seconds; manual soldering 390°C for 3 seconds.
    DC input polarity and wiring drop Connect the positive and negative DC input terminals correctly. Do not apply a negative input voltage. Account for voltage drop in the input wiring because the input current can be high.
    Input and output separation Do not connect Vin- to Vout-. Follow the pin or lead-wire diagram for this exact model; identical wire colors do not make the input and output negative connections interchangeable.
    Dim-off output voltage When dimmed off, the output voltage falls to approximately the input voltage. Complete darkness requires an LED string that remains off at that input voltage; dim-off is not a zero-output-voltage isolation state.
    Battery and DC-bus EMC The catalogue states battery-source compliance with BS EN/EN 55015 without additional input filters or capacitors. A DC-bus source requires the model-specific additional EMC filter circuit shown in the catalogue.
    Installation reference scope The catalogue links the general LED installation manual, whose family list does not explicitly name LDH. Use this DC model's specific pinout and application limits; the general manual does not establish AC wiring or circuit-breaker ratings for this unit.
    Short-circuit limitation The specified short-circuit response is power off with the fuse open. Automatic short-circuit recovery is not specified.
    DALI connection boundary Use the DA- and DA+ connections for this DALI version; pin 5 is absent. The catalogue lists 16 groups and 64 addresses, with a minimum dimming level of about 8%. The analogue and PWM input specifications belong to the non-DA version.
    Output headroom The output must be at least 12 V above the DC input for this DALI version, within the model-specific output-voltage range.

    Safety and reference information

    Safety approvals LVD BS EN/EN 61347-1, BS EN/EN 61347-2-13, and EAC TP TC 004 approved. The DALI marking on the cover is specifically for DA types.
    EMC emission / immunity Emission: BS EN/EN 55015 and EAC TP TC 020. Immunity: BS EN/EN 61547; BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level; EAC TP TC 020.
    Battery / DC-bus EMC conditions For battery supply, the catalog states compliance with BS EN/EN 55015 without additional input filter and capacitors. For DC-bus supply, additional EMC filter components are required; follow the page 11 circuit and validate the complete installation.
    Recommended EMC circuit Page 11 shows C1 = 47 µF across the DC-source lines, LF1 = 47 mH in the supply/input path, and LF2 = 10.4 mH between the controller and dimming connection.
    MTBF 12195.2 thousand hours minimum: Telcordia SR-332 (Bellcore); 1179.3 thousand hours minimum: MIL-HDBK-217F at 25°C.
    Unit mass / warranty 138 g, the catalog PACKING reference per unit; not a measured shipping-package weight. The catalog states a 3-year manufacturer warranty, subject to the manufacturer’s terms.
    Download MEAN WELL LED Installation Manual (Catalog Reference)

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