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Mean Well

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
$19.16 USD
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Available to order
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Overview

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

OUTPUT

RATED CURRENT
1050mA
CURRENT ACCURACY(Typ.)
±5% at 12VDC input
VOLTAGE RANGE Non-DALINote.2
12~43VDC
VOLTAGE RANGE DALINote.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 RANGENote.2
9~18VDC
EFFICIENCY (max.)
91%
DC CURRENT (Typ.)
4.2A

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.)
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)
Test conditions and notes3
  1. 1. All parameters are specified at normal input(12VDC,24VDC), rated load, 25℃ 70% RH ambient.
  2. 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. 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

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.

Payment & Security

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

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

$19.16 USD

LDH-45A-1050WDA is the model of this series: rated current 1050mA, rated power 45.15W, 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
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