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Mean Well LDH-45A-350WDA DC/DC LED Driver CC 350mA - Step-up

Name: Mean Well LDH-45A-350WDA DC/DC LED Driver CC 350mA - Step-up
Brand: Mean Well
SKU: LDH-45A-350WDA
Price: 19.84 USD
Availability: InStock

constant currentstep uphigh efficiency up to 95%wire style

SKU LDH-45A-350WDA

$19.84 USD

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Available to order

Overview

LDH-45A-350WDA is the model of this series: rated current 350mA, rated power 30.1W, typical efficiency 91%.

Features

DC/DC step-up converter
Constant current output : 350mA to 1050mA
Wide output LED string voltage up to 126VDC
High efficiency up to 95%
PWM + analog dimming and remote ON/OFF control [(Blank) type or W type]
DALI dimming [(Blank)DA type or WDA type]
Protections: Short circuit / Over voltage / Under voltage
Cooling by free air convection
Fully encapsulated
3 years warranty

Specifications

LDH-45A-350WDASpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

RATED CURRENT: 350mA
CURRENT ACCURACY(Typ.): ±5% at 12VDC input
VOLTAGE RANGE Non-DALI^Note.2: 12~86VDC
VOLTAGE RANGE DALI^Note.2: 24~86VDC
NO LOAD OUTPUT VOLTAGE(max.): 100V
RATED POWER: 30.1W
RIPPLE & NOISE (max.)^Note.3: 2.5Vp-p

INPUT

RATED VOLTAGE: 12VDC
VOLTAGE RANGE^Note.2: 9~18VDC
EFFICIENCY (max.): 91%
DC CURRENT (Typ.): 2.8A

PWM DIMMING & ON/OFF CONTROL

REMOTE ON/OFF: Leave open if not used Power ON with dimming: PWM signal >2~8VDC or open circuit, between PWM DIM and DIM- Power OFF : PWM signal <0.5VDC or short or PWM duty is equal to 0%, between PWM DIM and DIM-
PWM DIMMING FREQUENCY: 1K~10KHz
QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(Typ.): 7mA when PWM dimming OFF

ANALOG DIMMING & ON/OFF CONTROL

REMOTE ON/OFF: Leave open if not used Power on with dimming: DC input >0.25~8VDC or open circuit, between Analog DIM and DIM- Power off : DC input <0.2VDC or short, between Analog DIM and DIM-
DIM INPUT VOLTAGE RANGE: 0.25~1.3VDC
MAX OPERATION VOLTAGE: 8V; The output current remains constant when voltage changes from 1.3V to 8V
QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(Typ.): 7mA when Analog dimming OFF

PROTECTION

SHORT CIRCUIT: Protection type : Power OFF and fuse open
OVER VOLTAGE (max.): 100V Protection type : Constant output voltage and shut off o/p current, recovers automatically after fault condition is removed

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: 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: 12195.2K hrs min. Telcordia SR-332 (Bellcore) ; 1179.3K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 75*53*22.7mm (L*W*H)
PACKING: 138g;100pcs/14.8Kg/0.83CUFT[(Blank) type or (Blank) DA type],1.04CUFT(W type or WDA type)

Test conditions and notes3

1. All parameters are specified at normal input(12VDC,24VDC), rated load, 25℃ 70% RH ambient.
2. (Blank) type and W type output voltage must step up by 3 Volts from input DC voltage; (Blank)DA type and WDA type output voltage must step up by 12 Volts from input DC voltage.
3. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf parallel capacitor.

Technical drawings

LDH-45A-350WDA Mechanical Specification — Mechanical Specification

LDH-45A-350WDA Standard Application — Standard Application

LDH-45A-350WDA Efficiency VS Output Voltage(Number — Efficiency VS Output Voltage(Number

LDH-45A-350WDA Application Notes of EMC — Application Notes of EMC

Downloads

Certificates3

Mean Well LDH-45-EMC Certificate PDF Download

Mean Well LDH-45(DA)-CE-dec Certificate PDF Download

Mean Well LDH-45(DA)-UK-dec Certificate PDF Download

Test reports1

Mean Well LDH-45A-350 Test Report PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can I use the LDH-45A-350WDA for 350mA LED downlights with a longer series string?

Yes, if the downlight uses constant current at 350mA and the total LED forward voltage stays within the 24-86V constant current range. This model is suited to higher-voltage LED strings because its regulated output starts at 24V and goes up to 86V. The connected load also needs to stay within 30.1W.

Is this a good driver for constant current signage modules in a sealed outdoor housing?

It can be used for constant current signage modules that require 350mA and fall within the 24-86V output range. The datasheet gives no IP or waterproof rating, so the sealed housing must keep moisture out, and the -40°C to +70°C operating range (refer to the derating curve) covers wide temperature swings. It is not intended for fixed-voltage LED products.

Can the LDH-45A-350WDA run a small LED array that needs more than a low string voltage?

Yes, this step-up constant current driver is intended for 350mA LED arrays whose total forward voltage sits in the 24-86V range. That makes it better suited to higher-voltage arrays than lower-voltage constant current strings. The array must also remain within the 30.1W rating.

What matters most when checking LED compatibility with the LDH-45A-350WDA?

The LED load must be a constant current load rated for 350mA, and its total forward voltage must fit the 24-86V constant current range. The number of LEDs depends on each LED's forward voltage, so compatibility is based on total string voltage rather than a set LED count. The driver's maximum output voltage is 86V and its power rating is 30.1W.

Will this driver handle cold, hot, or wet environments for LED assemblies?

It operates from -40°C to +70°C (refer to the derating curve) at 20-90% RH non-condensing, so it handles cold and hot ambients. The datasheet gives no IP or waterproof rating, so in wet locations it must be protected by the LED assembly's housing. Its compact dimensions are 75.0 × 53.0 × 22.7 mm.

Payment & Security

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Model	Power	Voltage	Current	IP Rating
Mean Well LDH-45A-350W DC/DC LED Driver CC 350mA - Step-up	30.1W	86V	0.35A	IP67	View
Mean Well LDH-45A-350DA DC/DC LED Driver CC 350mA - Step-up	30.1W	86V	0.35A	IP67	View
Mean Well LDH-45A-350 DC/DC LED Driver CC 350mA - Step-up	30.1W	86V	0.35A	IP67	View

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Mean Well LDH-45A-350WDA DC/DC LED Driver CC 350mA - Step-up

Overview

Features

Specifications

OUTPUT

INPUT

PWM DIMMING & ON/OFF CONTROL

ANALOG DIMMING & ON/OFF CONTROL

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

Technical drawings

Downloads

Certificates3

Test reports1

Catalogues1

FAQ

Payment & Security

Other LDH-45A Models

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Mean Well LDH-45A-350WDA DC/DC LED Driver CC 350mA - Step-up

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