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Mean Well LDH-45B-1050WDA DC/DC LED Driver CC 1050mA - Step-up

Name: Mean Well LDH-45B-1050WDA DC/DC LED Driver CC 1050mA - Step-up
Brand: Mean Well
SKU: LDH-45B-1050WDA
Price: 19.84 USD
Availability: InStock

constant currentstep uphigh efficiency up to 95%wire style

SKU LDH-45B-1050WDA

$19.84 USD

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Available to order

Overview

LDH-45B-1050WDA is the model of this series: rated current 1050mA, rated power 45.15W, typical efficiency 95%. Type WDA: Wire style, DALI dimming.

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%
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-45B-1050WDASpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

RATED CURRENT: 1050mA
CURRENT ACCURACY(Typ.): ±5% at 24VDC input
VOLTAGE RANGE DALI^Note.2: 36~43VDC
NO LOAD OUTPUT VOLTAGE(max.): 50V
RATED POWER: 45.15W
RIPPLE & NOISE (max.)^Note.3: 1.2Vp-p

INPUT

RATED VOLTAGE: 24VDC
VOLTAGE RANGE^Note.2: 18~32VDC
EFFICIENCY (max.): 95%
DC CURRENT (Typ.): 2A

ANALOG DIMMING & ON/OFF CONTROL

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

PROTECTION

SHORT CIRCUIT: Protection type : Power OFF and fuse open
OVER VOLTAGE (max.): 50V 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)

MODEL ENCODING

A: 9~18VDC input range
B: 18~32VDC input range
Blank: PIN style, PWM+analog dimming
W: Wire style, PWM+analog dimming
DA: PIN style, DALI dimming
WDA (this model): Wire style, DALI dimming

Test conditions and notes3

1. All parameters are specified at normal input(12VDC,24VDC), rated load, 25℃ 70% RH ambient.
2. 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-45B-1050WDA Mechanical Specification — Mechanical Specification

LDH-45B-1050WDA Standard Application — Standard Application

LDH-45B-1050WDA Efficiency VS Output Voltage(Number — Efficiency VS Output Voltage(Number

LDH-45B-1050WDA Application Notes of EMC — Application Notes of EMC

Downloads

Datasheet1

LDH-45B-1050WDA datasheetLDH-45-spec.pdf · 2024-10-16 edition PDF Download

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-45B-1050 Test Report PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can I use the LDH-45B-1050WDA for a 1050mA LED downlight with a 36-43V LED string?

Yes, if the downlight is designed for constant current operation at 1050mA and the total forward voltage falls within 36-43V. This model is a constant current driver, not a constant voltage power supply. Its output power is rated at 45.15W.

Is this driver suitable for 1050mA signage modules with a higher forward-voltage requirement?

It can be suitable when the signage module needs 1050mA constant current and operates within the 36-43V CC range. That makes it more specific to higher-voltage LED loads than the wider 21-43V versions. It should not be used for constant voltage signage modules.

Can the LDH-45B-1050WDA drive a small LED array that falls in the upper part of this series voltage range?

Yes, this model is intended for constant current LED arrays at 1050mA where the combined LED forward voltage is between 36V and 43V. Because its constant current window starts at 36V, lower-voltage arrays are outside its specified range. The number of LEDs depends on the forward voltage of each LED.

Will this driver hold up in wet or cold outdoor conditions?

The datasheet gives no IP or waterproof rating, and humidity is specified at 20-90% RH non-condensing, so it must be protected from water in outdoor use. Its operating temperature range is -40°C to +70°C (refer to the derating curve), so it is designed for both low and high ambient temperatures within that span. The rest of the lighting system should provide the needed protection.

How do I determine if my LED load is compatible with the LDH-45B-1050WDA?

The load must require 1050mA constant current and operate within the driver's 36-43V CC output range. The number of LEDs depends on each LED's forward voltage, so compatibility is based on total forward voltage rather than a fixed LED count. If the load is constant voltage, this driver is not the correct choice.

What separates the LDH-45B-1050WDA from the other 1050mA LDH-45B models?

The LDH-45B-1050WDA is a 45.15W, 1050mA wire-style model with a 36-43V CC range. The LDH-45B-1050DA has the same 36-43V range in pin style, while the LDH-45B-1050 and LDH-45B-1050W use a wider 21-43V CC range at the same 45.15W and 1050mA ratings. All four have a 43V output rating.

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Mean Well LDH-45B-1050WDA DC/DC LED Driver CC 1050mA - Step-up

Overview

Features

Specifications

OUTPUT

INPUT

ANALOG DIMMING & ON/OFF CONTROL

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

MODEL ENCODING

Technical drawings

Downloads

Datasheet1

Certificates3

Test reports1

Catalogues1

FAQ

Payment & Security

Write a review

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Mean Well LDH-45B-1050WDA DC/DC LED Driver CC 1050mA - Step-up

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