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Mean Well LDDS-300HW DC/DC LED Driver CC 300mA - Step-down Wire Type

Name: Mean Well LDDS-300HW DC/DC LED Driver CC 300mA - Step-down Wire Type
Brand: Mean Well
SKU: LDDS-300HW
Price: 9.21 USD
Availability: InStock

constant currentstep downhigh efficiency up to 97%IP67wire style

SKU LDDS-300HW

$9.21 USD

Shipping calculated at checkout.

Available to order

Overview

LDDS-300HW is the model of this series: typical efficiency 95%.

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-300HWSpecifications from the official datasheet (2026-08-20 edition)

OUTPUT

CURRENT RANGE: 300mA
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: 95%
DC CURRENT Full load^Note.3: 250mA
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-300HW Derating Curve — Derating Curve

LDDS-300HW Standard Application(LDDS-HW series)(Remote — Standard Application(LDDS-HW series)(Remote

LDDS-300HW 3 in 1 Dimming Control(LDDS-HWB — 3 in 1 Dimming Control(LDDS-HWB

LDDS-300HW Efficiency VS Output Voltage(Number — Efficiency VS Output Voltage(Number

LDDS-300HW 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 the LDDS-300HW be used for a 300mA LED downlight?

Yes, if the downlight is a constant-current design that requires 300mA and its LED load falls within the 2-45V output range. Because this is a constant-current driver, it is not the correct match for constant-voltage lighting products.

Is the LDDS-300HW suitable for architectural signage modules?

It can be used for constant-current signage modules that need 300mA and operate within the 2-45V output range. Its compact, epoxy-potted 47 x 12 x 7 mm body fits slim sign housings.

Can I use this driver for a compact LED array in a small fixture?

Yes, provided the LED array is rated for constant-current 300mA operation and stays within the 2-45V range. The exact number of LEDs depends on the forward voltage of each LED rather than a preset count.

What LEDs are compatible with the LDDS-300HW?

Compatible loads are constant-current LEDs that need 300mA and fit inside the 2-45V output range. Constant-voltage strips are not compatible, and the LED count depends on the forward voltage of the LEDs being used.

How does the LDDS-300HW compare with other LDDS-HW and LDDS-HWB versions?

All listed siblings share the same 2-45V output range. The difference is output current: 250mA on the 250 models, 300mA on the 300 models, 350mA on the 350 models, 500mA on the 500 models, 700mA on the 700 models, and 1000mA on the 1000 models; HW versions use remote ON/OFF, HWB versions add 3 in 1 dimming.

Payment & Security

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Mean Well ODLC-65A-1050 Power Supply 65W 1050mA (Auxiliary DC output)	65.1W	62V	1.05A	IP67	View
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