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Mean Well LDH DC/DC LED Driver CC 350mA - Step-up - with Wire

Name: Mean Well LDH DC/DC LED Driver CC 350mA - Step-up - with Wire
Brand: Mean Well
SKU: LDH-25-350W
Price: 9.44 USD
Availability: InStock

constant currentstep uphigh efficiency up to 95%wire style

SKU LDH-25-350W

$9.44 USD

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Overview

LDH-25-350W is the model of this series: rated current 350mA, rated power 25.2W, typical efficiency 92%/12V 95%/24V.

LDH-25 series is a 25W DC/DC LED driver featuring constant current output. LDH-25 operates from 9.5～32VDC and offers models with different rated current ranging between 250mA and 700mA. With the high efficiency up to 95.5%, The 94V-0 flame retar-dant plastic case the fully-potted silicore e enhance the heat dissipation allows this series to fit solar LED street light. LDH-25 is equipped with various function options, such as dimming methodologies, so as to provide the optimal design flexibility for DC source LED lighting system.

Features

Wide DC input voltage operation 9.5~32V
DC/DC step-up converter
Constant current output : 250mA to 700mA
Wide output LED forward voltage up to 84V DC
High efficiency up to 95.5%
2 in 1 dimming (0-10V, PWM)
Protections: Short circuit / Over voltage
Cooling by free air convection
Fully encapsulated
3 years warranty

Specifications

LDH-25-350WSpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

RATED CURRENT: 350mA
CURRENT ACCURACY(Typ.): ±5% at 12VDC input and 24 VDC Input
VOLTAGE RANGE^Note.2: 12.5~72VDC
RATED POWER: 25.2W
CURRENT RIPPLE: 5%(@rated current)

INPUT

VOLTAGE RANGE^Note.2: 9.5~32VDC
EFFICIENCY (Typ.): 92%/12V 95%/24V
DC CURRENT (Typ.): 2.5A/12VDC, 1.2A/24VDC

DIMMING

DIMMING FUNCTION^Note.2: Leave open if not used 1KHz-3KHz 10V PWM signal or 0-10V DC input
QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(Typ.): 7mA when PWM dimming OFF @12VDC

PROTECTION

SHORT CIRCUIT: Output short circuit, the power supply will be damaged
OVER VOLTAGE: 73~100V
NO LOAD: Output voltage rise to OVP, and drop equal to input voltage, re-power to recovery

ENVIRONMENT

WORKING TEMP.: -40 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes
SOLDERING TEMPERATURE: Wave soldering: 265℃,5s (max.); Manual soldering: 390℃,3s (max.)

SAFETY & EMC

SAFETY STANDARDS: LVD BS EN/EN61347-1, BS EN/EN61347-2-13, EAC TP TC 004 approved
EMC EMISSION^Note.5: Compliance to BS EN/EN55015;EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/EN61547,BS EN/EN61000-4-2,3,4,6,8; light industry level,EAC TP TC 020

OTHERS

MTBF: 12369.5K hrs min. Telcordia TR/SR-332(Bellcore); 896.4Khrs min. MIL-HDBK-217F (25℃)
DIMENSION: 52.4*27.2*24mm (L*W*H)
PACKING: Pin mounted style: 50g, 200pcs/11Kg/0.89CUFT; Lead wire style: 57g, 200pcs/12.4kg/0.98CUFT

Test conditions and notes5

1.All parameters are specified at normal input(12VDC), rated load, 25℃ 70% RH ambient.
2.Non dimming application: Output voltage must step up by 3 Volts from input DC voltage Dimming application: Output voltage must be twice higher than the input DC voltage If input voltage down below 11V, the output current may drop to more than 80% of the rated current
3.This series meets the typical life expectancy of >35,000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 80℃ or less.
4.The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
5.BS EN/EN55015 EMI testing layout is based on DC input with a battery source

Technical drawings

LDH-25-350W Mechanical Specification — Mechanical Specification

LDH-25-350W Standard Application — Standard Application

LDH-25-350W Efficiency VS Load — Efficiency VS Load

LDH-25-350W Application Notes of EMC — Application Notes of EMC

Typical applications

DC battery source lighting
Portable lighting
LED solar street lighting
LED greenhouse lighting
LED Low-bay lighting

Downloads

Certificates3

Mean Well LDH-25-LVD Certificate PDF Download

Mean Well LDH-25-CE-dec Certificate PDF Download

Mean Well LDH-25-UK-dec Certificate PDF Download

Test reports1

Mean Well LDH-25-350 Test Report PDF Download

FAQ

Can I use the LDH-25-350W for a 350 mA LED downlight load?

Yes, this driver is designed for 350 mA constant current output and supports LED loads within a 12.5-72V constant current range. It is intended for constant current lighting loads, not constant voltage LED products.

Is the LDH-25-350W a fit for small LED arrays or channel-letter style LED modules?

It can be a fit when the LED load is specified for 350 mA constant current operation. The usable LED string voltage must stay within 12.5-72V, and the exact number of LEDs depends on the forward voltage of each LED.

Can this step-up driver be used where the LED string voltage is above the source voltage?

Yes, the LDH-25-350W accepts 9.5-32VDC input and can provide constant current output up to 72V. That makes it relevant for constant current LED systems where the required LED voltage is higher than the input supply range.

What should I verify before pairing LEDs with the LDH-25-350W?

Verify that the LEDs are intended for 350 mA constant current drive and that the full load operates inside the 12.5-72V constant current range. The driver does not define a fixed LED count because that depends on each LED's forward voltage.

Can the LDH-25-350W handle wide ambient temperature swings?

Its specified operating temperature range is -40°C to +70°C (refer to the derating curve). No IP rating is listed in the provided specs, so moisture and enclosure protection need to be addressed separately from the driver's temperature rating.

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