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

Description

LDH-45B-500W DC/DC LED driver

MEAN WELL LDH-45B-500W is a fully encapsulated DC/DC step-up constant-current LED driver with 500 mA rated output, a 21–86 VDC LED operating window and 43 W rated power. This wire-style version uses 18–32 VDC input and provides PWM and analog dimming with remote on/off control. Select the LED string so its voltage stays within the stated window and is at least 3 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-45B-500W / LDH-45. B selects the 18–32 VDC input range. W: wire style with PWM and analog dimming.
Rated current / power 500 mA constant current / 43 W. Keep voltage, current and power within their stated limits together.
LED output-voltage window 21–86 VDC for this non-DALI version.
Required step-up margin Output voltage must exceed the actual DC input by at least 3 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 24 VDC input.
Maximum ripple and noise 1.7 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 18–32 VDC operating range; 24 VDC rated/reference input. Observe input polarity and the load limits below.
Typical input current 2.1 A at the catalog reference conditions.
Efficiency specification / plots The specification table lists 94% in its “EFFICIENCY (max.)” row. Page 10 separately plots the LDH-45B-500 example at 24 VDC input and LED Vf = 3.25 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 B-input curve: 100% load over 18–32 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 24 VDC input, rated load, +25°C and 70% RH ambient.

Dimming and operating control

Undimmed operation Leave Analog DIM and PWM DIM open for rated-current operation. Leave any unused dimming input open.
PWM dimming / on-off Apply a 1–10 kHz PWM signal between PWM DIM and DIM−. High level: above 2 V and no more than 8 V; low level below 0.5 V. Open circuit enables operation. A low signal, a short between these control terminals, or 0% PWM duty switches output current off.
PWM current characteristic Output current varies with PWM duty; the 1 kHz and 10 kHz curves differ and are not a universal one-to-one duty/current relationship. The plots use 12/24 VDC input at full load and state ±10% tolerance.
Analog dimming / on-off Apply 0.25–1.3 VDC between Analog DIM and DIM− for current adjustment. Maximum operating control voltage is 8 V; current remains constant from 1.3 to 8 V. Open circuit enables operation. Below 0.2 V or a short between these control terminals switches output current off.
Analog characteristic / shutdown current The analog-current curve is shown at 12/24 VDC input and full load with ±10% tolerance. Typical input quiescent current is 7 mA when PWM dimming is off, or 7 mA when analog dimming is off.
Control-reference connections DIM− is the dimming-signal reference. Do not connect DIM− to Vout− or Vin−. Pin/position 4 is Analog DIM; pin/position 5 is PWM DIM.
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 B-input branch, the 100% load curve extends from −40 to +70°C and ends there. Apply the input-voltage and LED-load limits as well.
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 Wire positions: 1 Vin+ red; 2 Vin− black; 6 Vout− black; 7 Vout+ red. Do not connect Vin− to Vout−; connect the LED string to Vout+ and Vout−.
Control connections Wire positions: 3 DIM− black; 4 Analog DIM white; 5 PWM DIM blue.
Wire / pin dimensions The drawing shows 100 ±10 mm leads at both ends and 8 mm stripped ends. No wire gauge is specified on this mechanical page.
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.
Analogue and PWM connection boundary Use the separate analogue DIM and PWM DIM inputs relative to DIM-. Do not connect DIM- to Vout- or Vin-. Leave unused dimming inputs open. The analogue adjustment range is 0.25-1.3 V with an 8 V maximum; PWM frequency is 1-10 kHz.
Output headroom The output must be at least 3 V above the DC input for this non-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.
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-45B-500W

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

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    Description

    LDH-45B-500W DC/DC LED driver

    MEAN WELL LDH-45B-500W is a fully encapsulated DC/DC step-up constant-current LED driver with 500 mA rated output, a 21–86 VDC LED operating window and 43 W rated power. This wire-style version uses 18–32 VDC input and provides PWM and analog dimming with remote on/off control. Select the LED string so its voltage stays within the stated window and is at least 3 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-45B-500W / LDH-45. B selects the 18–32 VDC input range. W: wire style with PWM and analog dimming.
    Rated current / power 500 mA constant current / 43 W. Keep voltage, current and power within their stated limits together.
    LED output-voltage window 21–86 VDC for this non-DALI version.
    Required step-up margin Output voltage must exceed the actual DC input by at least 3 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 24 VDC input.
    Maximum ripple and noise 1.7 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 18–32 VDC operating range; 24 VDC rated/reference input. Observe input polarity and the load limits below.
    Typical input current 2.1 A at the catalog reference conditions.
    Efficiency specification / plots The specification table lists 94% in its “EFFICIENCY (max.)” row. Page 10 separately plots the LDH-45B-500 example at 24 VDC input and LED Vf = 3.25 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 B-input curve: 100% load over 18–32 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 24 VDC input, rated load, +25°C and 70% RH ambient.

    Dimming and operating control

    Undimmed operation Leave Analog DIM and PWM DIM open for rated-current operation. Leave any unused dimming input open.
    PWM dimming / on-off Apply a 1–10 kHz PWM signal between PWM DIM and DIM−. High level: above 2 V and no more than 8 V; low level below 0.5 V. Open circuit enables operation. A low signal, a short between these control terminals, or 0% PWM duty switches output current off.
    PWM current characteristic Output current varies with PWM duty; the 1 kHz and 10 kHz curves differ and are not a universal one-to-one duty/current relationship. The plots use 12/24 VDC input at full load and state ±10% tolerance.
    Analog dimming / on-off Apply 0.25–1.3 VDC between Analog DIM and DIM− for current adjustment. Maximum operating control voltage is 8 V; current remains constant from 1.3 to 8 V. Open circuit enables operation. Below 0.2 V or a short between these control terminals switches output current off.
    Analog characteristic / shutdown current The analog-current curve is shown at 12/24 VDC input and full load with ±10% tolerance. Typical input quiescent current is 7 mA when PWM dimming is off, or 7 mA when analog dimming is off.
    Control-reference connections DIM− is the dimming-signal reference. Do not connect DIM− to Vout− or Vin−. Pin/position 4 is Analog DIM; pin/position 5 is PWM DIM.
    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 B-input branch, the 100% load curve extends from −40 to +70°C and ends there. Apply the input-voltage and LED-load limits as well.
    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 Wire positions: 1 Vin+ red; 2 Vin− black; 6 Vout− black; 7 Vout+ red. Do not connect Vin− to Vout−; connect the LED string to Vout+ and Vout−.
    Control connections Wire positions: 3 DIM− black; 4 Analog DIM white; 5 PWM DIM blue.
    Wire / pin dimensions The drawing shows 100 ±10 mm leads at both ends and 8 mm stripped ends. No wire gauge is specified on this mechanical page.
    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.
    Analogue and PWM connection boundary Use the separate analogue DIM and PWM DIM inputs relative to DIM-. Do not connect DIM- to Vout- or Vin-. Leave unused dimming inputs open. The analogue adjustment range is 0.25-1.3 V with an 8 V maximum; PWM frequency is 1-10 kHz.
    Output headroom The output must be at least 3 V above the DC input for this non-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.
    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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