MEAN WELL NLDD-H series: DC/DC step-down constant-current LED driver - NLDD-500H

Description

NLDD-500H DC/DC LED driver

MEAN WELL NLDD-500H is a DC/DC step-down constant-current LED driver rated at 500 mA, with a 6–52 VDC output operating window and 10–56 VDC input. This pin-style model provides PWM dimming and remote on/off control in a fully encapsulated package for Class III lighting applications (SELV). Select the LED string within its voltage window and keep its operating voltage at least 4 V below the actual input voltage.

Download MEAN WELL NLDD-H Datasheet (PDF)

Combined catalog pages 1–6; NLDD-H revision 2024-10-16.

Output and model selection

Complete model / construction NLDD-500H / NLDD-H series. H denotes pin style. The output current is selected by the complete model code.
Rated output current 500 mA constant current. The family offers separate 350, 500, 700, 1050, 1200 and 1400 mA models; these are model choices, not an adjustment range for this unit.
LED output-voltage window 6–52 VDC, subject to the input-to-output voltage margin.
Typical current accuracy ±5% at 48 VDC input.
Maximum ripple and noise 150 mVp-p. Measurement uses 20 MHz bandwidth and a 12-inch twisted pair terminated with a 0.1 µF capacitor.
Switching frequency 200 kHz. This is the converter switching frequency, separate from the PWM control frequency.

Input and performance

DC input-voltage range 10–56 VDC operating range; 59 VDC maximum. The maximum value does not extend the normal operating range.
Full-load input current 490 mA at 48 VDC input, as listed in the specification table.
No-load input current 5 mA, as listed in the specification table.
Maximum efficiency 96% at full load and 36 VDC or 48 VDC input. Efficiency varies with the operating point; use this model-specific table value and its stated conditions.
Reference measurement conditions Unless otherwise specified: normal 48 VDC input, rated load, +25°C and 70% RH ambient.

Dimming and operating control

PWM application levels The application drawing uses 5 V high and 0 V low control levels at 100–1000 Hz.
PWM current characteristic The output follows PWM current pulses. The illustrated duty/current characteristic is marked ±5% typical; its labeled duty scale begins at 10%. Use the stated on/off thresholds for shutdown rather than treating the plot as a guaranteed continuous low-end dimming range.
Shutdown input current Maximum 2 mA with PWM dimming OFF at 48 VDC input.

Protection and environment

Short-circuit protection Regulated at rated current. The short-circuit condition can be sustained, with automatic recovery after the fault is removed.
Overtemperature protection Typical detection at Tj 165°C on the main control IC, IC1. Output shuts down and recovers automatically after the temperature falls. This is an internal junction threshold, not the allowable ambient temperature.
Cooling and ambient limits Free-air convection. The common specification lists −40 to +50°C subject to derating. For this model, the full-load curve runs from −40 to +50°C and ends at +50°C. Respect the case-temperature and other operating limits as well.
Maximum operating case temperature 90°C.
Humidity and storage Operating humidity: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH.
Temperature coefficient ±0.03%/°C.
Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes along each of the X, Y and Z axes.

Connections and construction

Overall dimensions 32.1 × 20.5 × 12.5 mm (L × W × H). Drawing tolerance: ±1 mm.
Power and control pin assignments Bottom view: pins 1 and 2 = −Vin; 11 and 12 = −Vout; 13 and 14 = +Vout; 22 = PWM DIM; 23 and 24 = +Vin. Other pins are NC. Do not connect −Vin to −Vout.
Pin dimensions Pin diameter 0.60 mm; the catalog states a pin tolerance of ±0.5 mm. The side view shows 3.81 mm pin projection. Use the bottom-view drawing for the exact PCB footprint and pin orientation.
Case and encapsulation Fully encapsulated plastic case rated UL94-V0. The specification table identifies the potting material as epoxy (UL94-V0), while the overview calls it silicone. Confirm the actual compound with the manufacturer if material identity is important to the application.
Soldering limits Wave soldering: 265°C for 5 seconds maximum. Manual soldering: 390°C for 3 seconds maximum.
Unit mass 15.6 g for this pin-style model, explicitly listed as unit weight in the catalog.

Installation requirements

Installation reference scope The catalogue links the general LED installation manual, whose family list does not explicitly name NLDD. Use this model's DC input, output and control diagrams; the reference does not establish AC wiring or circuit-breaker ratings for this module.
DC wiring separation Do not connect -Vin to -Vout. Do not connect this unit's output to its own input or to the output of another power source.
Step-down operating boundary The catalogue specifies an output at least 4 V below the DC input, within the model-specific output-voltage range. Select the LED forward voltage and input together.
PWM reference and unused control Apply PWM relative to -Vin at 100-1000 Hz. Leave the control input open when unused; ON is above 2.5 V up to 5 V or open, and OFF is below 0.8 V or shorted to -Vin.
Exact control connection This pin version uses position 22 for PWM DIM. Use the exact model drawing rather than assuming all current ratings have the same control-pin position.
System EMC verification This module is a component of the final system. Verify EMC with the complete device and use a model-appropriate additional EMI filter if required.

Safety and reference information

Safety approvals LVD BS EN/EN 61347-1, BS EN/EN 61347-2-13, IEC 61347, and EAC TP TC 004 approved. The series is designed for Class III applications (SELV).
EMC references BS EN/EN 55015 and BS EN/EN 61547 compliance. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level; EAC TP TC 020.
MTBF 29984.3 thousand hours minimum, Telcordia SR-332 (Bellcore); 2881.6 thousand hours minimum, MIL-HDBK-217F at 25°C.
Applications and warranty Applications include DC battery-powered lighting, portable lighting, DC 48 V track lighting and DC 24 V landscape lighting, within the electrical and environmental limits above. The catalog states a 3-year manufacturer warranty, subject to the manufacturer’s warranty statement.
Packing reference Catalog packing alternatives include 15 units per tube and 40 units per tray. These logistics quantities do not change the separately specified unit mass or establish the quantity supplied with an individual order.
Download MEAN WELL LED Installation Manual (Catalog Reference)

MEAN WELL NLDD-H series: DC/DC step-down constant-current LED driver - NLDD-500H

Product form

NLDD-500H DC/DC LED driver MEAN WELL NLDD-500H is a DC/DC step-down constant-current LED driver rated at 500 mA, with a... Read more

$10.35 Incl. VAT

    • Guaranteed secure & safe checkout.

      shop pay

    Description

    NLDD-500H DC/DC LED driver

    MEAN WELL NLDD-500H is a DC/DC step-down constant-current LED driver rated at 500 mA, with a 6–52 VDC output operating window and 10–56 VDC input. This pin-style model provides PWM dimming and remote on/off control in a fully encapsulated package for Class III lighting applications (SELV). Select the LED string within its voltage window and keep its operating voltage at least 4 V below the actual input voltage.

    Download MEAN WELL NLDD-H Datasheet (PDF)

    Combined catalog pages 1–6; NLDD-H revision 2024-10-16.

    Output and model selection

    Complete model / construction NLDD-500H / NLDD-H series. H denotes pin style. The output current is selected by the complete model code.
    Rated output current 500 mA constant current. The family offers separate 350, 500, 700, 1050, 1200 and 1400 mA models; these are model choices, not an adjustment range for this unit.
    LED output-voltage window 6–52 VDC, subject to the input-to-output voltage margin.
    Typical current accuracy ±5% at 48 VDC input.
    Maximum ripple and noise 150 mVp-p. Measurement uses 20 MHz bandwidth and a 12-inch twisted pair terminated with a 0.1 µF capacitor.
    Switching frequency 200 kHz. This is the converter switching frequency, separate from the PWM control frequency.

    Input and performance

    DC input-voltage range 10–56 VDC operating range; 59 VDC maximum. The maximum value does not extend the normal operating range.
    Full-load input current 490 mA at 48 VDC input, as listed in the specification table.
    No-load input current 5 mA, as listed in the specification table.
    Maximum efficiency 96% at full load and 36 VDC or 48 VDC input. Efficiency varies with the operating point; use this model-specific table value and its stated conditions.
    Reference measurement conditions Unless otherwise specified: normal 48 VDC input, rated load, +25°C and 70% RH ambient.

    Dimming and operating control

    PWM application levels The application drawing uses 5 V high and 0 V low control levels at 100–1000 Hz.
    PWM current characteristic The output follows PWM current pulses. The illustrated duty/current characteristic is marked ±5% typical; its labeled duty scale begins at 10%. Use the stated on/off thresholds for shutdown rather than treating the plot as a guaranteed continuous low-end dimming range.
    Shutdown input current Maximum 2 mA with PWM dimming OFF at 48 VDC input.

    Protection and environment

    Short-circuit protection Regulated at rated current. The short-circuit condition can be sustained, with automatic recovery after the fault is removed.
    Overtemperature protection Typical detection at Tj 165°C on the main control IC, IC1. Output shuts down and recovers automatically after the temperature falls. This is an internal junction threshold, not the allowable ambient temperature.
    Cooling and ambient limits Free-air convection. The common specification lists −40 to +50°C subject to derating. For this model, the full-load curve runs from −40 to +50°C and ends at +50°C. Respect the case-temperature and other operating limits as well.
    Maximum operating case temperature 90°C.
    Humidity and storage Operating humidity: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH.
    Temperature coefficient ±0.03%/°C.
    Vibration 10–500 Hz, 2G; 10 minutes per cycle, 60 minutes along each of the X, Y and Z axes.

    Connections and construction

    Overall dimensions 32.1 × 20.5 × 12.5 mm (L × W × H). Drawing tolerance: ±1 mm.
    Power and control pin assignments Bottom view: pins 1 and 2 = −Vin; 11 and 12 = −Vout; 13 and 14 = +Vout; 22 = PWM DIM; 23 and 24 = +Vin. Other pins are NC. Do not connect −Vin to −Vout.
    Pin dimensions Pin diameter 0.60 mm; the catalog states a pin tolerance of ±0.5 mm. The side view shows 3.81 mm pin projection. Use the bottom-view drawing for the exact PCB footprint and pin orientation.
    Case and encapsulation Fully encapsulated plastic case rated UL94-V0. The specification table identifies the potting material as epoxy (UL94-V0), while the overview calls it silicone. Confirm the actual compound with the manufacturer if material identity is important to the application.
    Soldering limits Wave soldering: 265°C for 5 seconds maximum. Manual soldering: 390°C for 3 seconds maximum.
    Unit mass 15.6 g for this pin-style model, explicitly listed as unit weight in the catalog.

    Installation requirements

    Installation reference scope The catalogue links the general LED installation manual, whose family list does not explicitly name NLDD. Use this model's DC input, output and control diagrams; the reference does not establish AC wiring or circuit-breaker ratings for this module.
    DC wiring separation Do not connect -Vin to -Vout. Do not connect this unit's output to its own input or to the output of another power source.
    Step-down operating boundary The catalogue specifies an output at least 4 V below the DC input, within the model-specific output-voltage range. Select the LED forward voltage and input together.
    PWM reference and unused control Apply PWM relative to -Vin at 100-1000 Hz. Leave the control input open when unused; ON is above 2.5 V up to 5 V or open, and OFF is below 0.8 V or shorted to -Vin.
    Exact control connection This pin version uses position 22 for PWM DIM. Use the exact model drawing rather than assuming all current ratings have the same control-pin position.
    System EMC verification This module is a component of the final system. Verify EMC with the complete device and use a model-appropriate additional EMI filter if required.

    Safety and reference information

    Safety approvals LVD BS EN/EN 61347-1, BS EN/EN 61347-2-13, IEC 61347, and EAC TP TC 004 approved. The series is designed for Class III applications (SELV).
    EMC references BS EN/EN 55015 and BS EN/EN 61547 compliance. Immunity: BS EN/EN 61000-4-2, -3, -4, -6 and -8, light-industry level; EAC TP TC 020.
    MTBF 29984.3 thousand hours minimum, Telcordia SR-332 (Bellcore); 2881.6 thousand hours minimum, MIL-HDBK-217F at 25°C.
    Applications and warranty Applications include DC battery-powered lighting, portable lighting, DC 48 V track lighting and DC 24 V landscape lighting, within the electrical and environmental limits above. The catalog states a 3-year manufacturer warranty, subject to the manufacturer’s warranty statement.
    Packing reference Catalog packing alternatives include 15 units per tube and 40 units per tray. These logistics quantities do not change the separately specified unit mass or establish the quantity supplied with an individual order.
    Download MEAN WELL LED Installation Manual (Catalog Reference)

    Recently viewed products

      Footer image

      © 2026 MEAN WELL, ,

      • US (USD $) US (USD $)
      • Ach Direct Debit
      • AliPay
      • Amazon
      • American Express
      • Apple Pay
      • Diners Club
      • Discover
      • Google Pay
      • Mastercard
      • PayPal
      • Shop Pay
      • USDC
      • Visa