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Mean Well LDDS-250HW DC/DC LED Driver CC 250mA - Step-down Wire Type

constant currentstep downhigh efficiency up to 97%IP67wire style

SKU LDDS-250HW

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Overview

LDDS-250HW is the model of this series: typical efficiency 94%. Type Blank: Remote ON/OFF control.

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
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-250HWSpecifications 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

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)

MODEL ENCODING

Blank (this model): Remote ON/OFF control
B: 3 in 1 Dimming function

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-250HW Derating Curve — Derating Curve

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

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

LDDS-250HW Pin Configuration — Pin Configuration

Typical applications

Downloads

Datasheet1

LDDS-250HW datasheetLDDS-H-SPEC.PDF · 2026-08-20 edition PDF Download

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-250HW for a 250mA LED downlight?

Yes, if the downlight is a constant-current type that requires 250mA and the LED load stays within the 2-45V output range. This is a step-down constant-current driver, so it should not be paired with a constant-voltage LED product.

Is the LDDS-250HW a good fit for low-current signage modules?

It is intended for constant-current LED loads at 250mA, which can include lower-current signage modules if their operating range fits within 2-45V. Its compact 47 x 12 x 7 mm epoxy-potted body suits tight sign housings when the rest of the system is matched correctly.

Can the LDDS-250HW power a small LED array for compact lighting?

Yes, if the array is built for constant-current operation at 250mA and the total forward voltage remains inside the 2-45V range. The usable LED quantity depends on the forward voltage of each LED rather than a fixed number.

Will the LDDS-250HW work with LED strips?

Only if the strip or module is a constant-current design that expects 250mA. Standard constant-voltage LED strips are not a match, because this driver provides constant current over a 2-45V output range.

Is the LDDS-250HW suitable for outdoor or cold-weather use?

The operating temperature range is -40°C to +55°C at full load, which supports cold-weather use. The datasheet gives no IP rating and specifies 20% to 90% RH non-condensing, so it is not specified for exposed outdoor or wet locations.

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Model	Power	Voltage	Current	IP Rating
Mean Well LDDS-700HWB DC/DC LED Driver CC 700mA - Step-down Wire Type - 3 in 1 Dimmable	45W	45V	0.7A	IP20	View
Mean Well LDDS-700HW DC/DC LED Driver CC 700mA - Step-down Wire Type	45W	45V	0.7A	IP20	View
Mean Well LDDS-500HWB DC/DC LED Driver CC 500mA - Step-down Wire Type - 3 in 1 Dimmable	45W	45V	0.5A	IP20	View
Mean Well LDDS-500HW DC/DC LED Driver CC 500mA - Step-down Wire Type	45W	45V	0.5A	IP20	View
Mean Well LDDS-350HWB DC/DC LED Driver CC 350mA - Step-down Wire Type - 3 in 1 Dimmable	45W	45V	0.35A	IP20	View
Mean Well LDDS-350HW DC/DC LED Driver CC 350mA - Step-down Wire Type	45W	45V	0.35A	IP20	View
Mean Well LDDS-300HWB DC/DC LED Driver CC 300mA - Step-down Wire Type - 3 in 1 Dimmable	45W	45V	0.3A	IP20	View
Mean Well LDDS-300HW DC/DC LED Driver CC 300mA - Step-down Wire Type	45W	45V	0.3A	IP20	View
Mean Well LDDS-250HWB DC/DC LED Driver CC 250mA - Step-down Wire Type - 3 in 1 Dimmable	45W	45V	0.25A	IP20	View
Mean Well LDDS-1000HWB DC/DC LED Driver CC 1000mA - Step-down Wire Type - 3 in 1 Dimmable	45W	45V	1A	IP20	View
Mean Well LDDS-1000HW DC/DC LED Driver CC 1000mA - Step-down Wire Type	45W	45V	1A	IP20	View

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