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Mean Well LDDS-250HWB DC/DC LED Driver CC 250mA - Step-down Wire Type - 3 in 1 Dimmable

Name: Mean Well LDDS-250HWB DC/DC LED Driver CC 250mA - Step-down Wire Type - 3 in 1 Dimmable
Brand: Mean Well
SKU: LDDS-250HWB
Price: 11.12 USD
Availability: InStock

constant currentstep downhigh efficiency up to 97%IP67wire style

SKU LDDS-250HWB

$11.12 USD

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Available to order

Overview

LDDS-250HWB is the model of this series: typical efficiency 94%.

LDDS-H series is a 45W DC/DC LED driver featuring constant current output. LDDS-H operates from 12~56VDC and offers models with different rated current ranging between 250mA and 1000mA. With the high efficiency up to 96%, The 94V-0 flame retardant plastic case with fully-potted to enhance the heat dissipation allows this series to fit for class Ⅲ commercial track light or DC bus lighting application.

Features

DC/DC step-down converter
Constant current output: 250mA to 1000mA
Wide input voltage: 12 ~ 56VDC(48V typ.)
Wide output LED forward string voltage: 2 ~ 45VDC
High efficiency up to 96%
Built-in EMI filter, comply with BS EN/EN55015
3 in 1 dimming and remote ON/OFF control.
Protections: Short circuit / Over temperature / Over current
Cooling by free air convection
Compact size and Fully encapsulated
Suitable for driving illumination LED
5 years warranty

Specifications

LDDS-250HWBSpecifications from the official datasheet (2026-08-20 edition)

OUTPUT

CURRENT RANGE: 250mA
VOLTAGE RANGE^Note.4: 2 ~ 45VDC
CURRENT ACCURACY (Typ.): ±5% at 48VDC input (or 24VDC)
RIPPLE & NOISE(max.)^Note.2: 150mVp-p
SWITCHING FREQENCY: 40KHz ~ 1000KHz
EXTERNAL CAPACITANCE LOAD (max.): 2.2uF

INPUT

VOLTAGE RANGE: 12 ~ 56VDC
EFFICIENCY (Typ.)^Note.3: 94%
DC CURRENT Full load^Note.3: 200mA
DC CURRENT No load: 6mA
FILTER: Capacitor

REMOTE ON/OFF & 3 IN 1 DIMMING

REMOTE ON/OFF: Leave open if not use Power ON with dimming: DIM ~ -Vin >2.5 ~ 15VDC or open circuit Power OFF : DIM ~ -Vin < 0.3VDC or short
PWM FREQUENCY: 100 ~ 1KHz (4mA at PWM dimming off)
3 IN 1 DIMMING: 0 ~ 10V / PWM / Resistor Dimming

PROTECTION

SHORT CIRCUIT: Regulated at rated output current Protection type: Can be continued, recovers automatically after fault condition is removed
OVER TEMPERATURE: Tj 150℃ typically(IC1) detect on main control IC Protection type : Shut down, recovers automatically after temperature goes down

ENVIRONMENT

WORKING TEMP.: -40 ~ + 55℃(Refer to derating curve) @ full load
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -55 ~ +125℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03% / ℃
VIBRATION: 10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
OPERATING CASE TEMP. (max.): 90℃

SAFETY & EMC

SAFETY STANDARDS: EAC TP TC 020/2011 approved
EMC EMISSION: Compliance to BS EN/EN55015, EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/EN61000-4-2,3,4,6,8, light industry level, criteria A, EAC TP TC 020

OTHERS

MTBF: 650Khrs min. MIL-HDBK-217F (25℃)
DIMENSION: 47*12*7mm or 1.85"*0.47"*0.28" inch (L*W*H)
PACKING: LDDS-HW: 9.5g, 36pcs/box, 0.43kg/box. 12 box per carton/6kg LDDS-HWB: 9.4g, 36pcs/box, 0.43kg/box. 12 box per carton/6kg
POTTING MATERIAL: Expoxy(UL94-V0)

Test conditions and notes5

1.All parameters are specified at normal input(48VDC), rated load, 25℃ 70% RH ambient.
2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1μf capacitor.
3.Test condition: 48VDC input, 36VDC output without Dimming.
4.Output voltage will always step down 4 volts from input DC voltage.
5.The output of LDDS-H should not be connected to the input of the same unit or output from other sources.

Technical drawings

LDDS-250HWB Derating Curve — Derating Curve

LDDS-250HWB Standard Application(LDDS-HW series)(Remote — Standard Application(LDDS-HW series)(Remote

LDDS-250HWB 3 in 1 Dimming Control(LDDS-HWB — 3 in 1 Dimming Control(LDDS-HWB

LDDS-250HWB Efficiency VS Output Voltage(Number — Efficiency VS Output Voltage(Number

LDDS-250HWB Pin Configuration — Pin Configuration

Typical applications

Downloads

Certificates3

Mean Well LDDS-H EMC Certificate PDF Download

Mean Well LDDS-xxxHWx-CE-dec Certificate PDF Download

Mean Well LDDS-xxxHWx-UK-dec Certificate PDF Download

FAQ

Can I use the LDDS-250HWB with a 250mA dimmable LED downlight?

Yes, if the downlight is a constant-current load rated for 250mA and its LED voltage stays within the 2-45V output range. This model is a constant-current step-down driver, so it is not intended for constant-voltage downlights.

Is the LDDS-250HWB appropriate for dimmable signage modules?

It can be used with constant-current signage modules that require 250mA and operate within the 2-45V range. Its 3 in 1 dimming input accepts 0-10V, PWM or resistor dimming control.

Can this model drive a small LED array that needs lower current?

Yes, if the array is designed for constant-current operation at 250mA and the total forward voltage fits within 2-45V. The number of LEDs will vary with the forward voltage of each LED, so there is no single fixed LED count.

How do I know if my LED load is compatible with the LDDS-250HWB?

The load needs to be a constant-current LED load, not a constant-voltage LED strip or module. This driver regulates 250mA across a 2-45V constant-current output range, and the final LED quantity depends on each LED's forward voltage.

What conditions is the LDDS-250HWB built to handle?

This driver operates from -40°C to +55°C at full load (derating above that per the datasheet curve) with 20% to 90% RH non-condensing humidity. The datasheet gives no IP rating, so plan for a protected, non-condensing installation where the LED load is also within the driver's electrical limits.

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