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

constant currentstep uphigh efficiency up to 95%wire style

SKU LDH-45A-1050WDA

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Overview

LDH-45A-1050WDA is the model of this series: rated current 1050mA, rated power 45.15W, typical efficiency 91%. 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-45A-1050WDASpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

RATED CURRENT: 1050mA
CURRENT ACCURACY(Typ.): ±5% at 12VDC input
VOLTAGE RANGE DALI^Note.2: 24~43VDC
NO LOAD OUTPUT VOLTAGE(max.): 50V
RATED POWER: 45.15W
RIPPLE & NOISE (max.)^Note.3: 1.9Vp-p

INPUT

RATED VOLTAGE: 12VDC
VOLTAGE RANGE^Note.2: 9~18VDC
EFFICIENCY (max.): 91%
DC CURRENT (Typ.): 4.2A

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-45A-1050WDA Mechanical Specification — Mechanical Specification

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

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

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

Downloads

Datasheet1

LDH-45A-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-45A-1050 Test Report PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can the LDH-45A-1050WDA drive a 1050mA LED downlight module?

Yes, if the downlight module is a constant current design rated for 1050mA and its total forward voltage is within the 24-43V CC range. This driver is not meant for constant voltage LED products that need a fixed output voltage.

Is the LDH-45A-1050WDA suitable for small architectural LED arrays?

It is suitable for small architectural LED arrays when the array is built as a 1050mA constant current load and remains within the 24-43V output range. The 45.15W rating supports higher-power constant current LED applications within that voltage window.

Can this driver be used in outdoor signage or wet-location fixtures?

Only if the sign or fixture protects it from water: the datasheet gives no IP or waterproof rating and specifies 20-90% RH non-condensing. The operating temperature range is -40°C to +70°C (refer to the derating curve). The connected LED load still needs to be a 1050mA constant current system within the 24-43V CC range.

How should I size an LED string for the LDH-45A-1050WDA?

Size the LED string so the total forward voltage falls between 24V and 43V while the load is designed for 1050mA constant current operation. The number of LEDs depends on each LED forward voltage, so there is no single fixed LED count for this model.

How does the LDH-45A-1050WDA compare to other 1050 output-current versions in the series?

LDH-45A-1050 and LDH-45A-1050W are 45.15W with a 12-43V CC range, while LDH-45A-1050DA and LDH-45A-1050WDA are 45.15W with a 24-43V CC range. LDH-45B-1050 and LDH-45B-1050W are 45.15W with 21-43V, and LDH-45B-1050DA and LDH-45B-1050WDA are 45.15W with 36-43V.

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Model	Power	Voltage	Current	IP Rating
Mean Well LDH-45A-700WDA DC/DC LED Driver CC 700mA - Step-up	44.8W	64V	0.7A	IP67	View
Mean Well LDH-45A-700W DC/DC LED Driver CC 700mA - Step-up	44.8W	64V	0.7A	IP67	View
Mean Well LDH-45A-700DA DC/DC LED Driver CC 700mA - Step-up	44.8W	64V	0.7A	IP67	View
Mean Well LDH-45A-700 DC/DC LED Driver CC 700mA - Step-up	44.8W	64V	0.7A	IP67	View
Mean Well LDH-45A-500WDA DC/DC LED Driver CC 500mA - Step-up	43W	86V	0.5A	IP67	View
Mean Well LDH-45A-500W DC/DC LED Driver CC 500mA - Step-up	43W	86V	0.5A	IP67	View
Mean Well LDH-45A-500DA DC/DC LED Driver CC 500mA - Step-up	43W	86V	0.5A	IP67	View
Mean Well LDH-45A-500 DC/DC LED Driver CC 500mA - Step-up	43W	86V	0.5A	IP67	View
Mean Well LDH-45A-350WDA DC/DC LED Driver CC 350mA - Step-up	30.1W	86V	0.35A	IP67	View
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
Mean Well LDH-45A-1050W DC/DC LED Driver CC 1050mA - Step-up	45.15W	43V	1.05A	IP67	View
Mean Well LDH-45A-1050DA DC/DC LED Driver CC 1050mA - Step-up	45.15W	43V	1.05A	IP67	View
Mean Well LDH-45A-1050 DC/DC LED Driver CC 1050mA - Step-up	45.15W	43V	1.05A	IP67	View

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Mean Well LDH-45A-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

Other LDH-45A Models

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

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