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Mean Well

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

constant currentstep uphigh efficiency up to 95%pin style
SKU LDH-45A-1050
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Overview

LDH-45A-1050 is the model of this series: rated current 1050mA, rated power 45.15W, typical efficiency 91%. Type Blank: PIN style, PWM+analog 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%
  • PWM + analog dimming and remote ON/OFF control [(Blank) type or W type]
  • Protections: Short circuit / Over voltage / Under voltage
  • Cooling by free air convection
  • Fully encapsulated
  • 3 years warranty

Specifications

LDH-45A-1050Specifications 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
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)

MODEL ENCODING

A
9~18VDC input range
B
18~32VDC input range
Blank (this model)
PIN style, PWM+analog dimming
W
Wire style, PWM+analog dimming
DA
PIN style, DALI dimming
WDA
Wire style, DALI dimming
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 output voltage must step up by 3 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-1050 Mechanical Specification
Mechanical Specification
LDH-45A-1050 Standard Application
Standard Application
LDH-45A-1050 Efficiency VS Output Voltage(Number
Efficiency VS Output Voltage(Number
LDH-45A-1050 Application Notes of EMC
Application Notes of EMC

Downloads

FAQ

Can I use the LDH-45A-1050 for high-output LED downlights that need 1050mA constant current?

Yes, if the downlight is designed for 1050mA constant current operation and the total LED forward voltage is within the 12-43V CC range. This model provides up to 45.15W, which makes it suitable for higher-power constant current LED loads.

Is the LDH-45A-1050 suitable for outdoor signage or exposed lighting modules?

The datasheet gives no IP or waterproof rating, so for outdoor signage or exposed modules it must be installed where it is protected from water and condensation. The driver still needs to match a constant current LED load of 1050mA with a combined forward voltage in the 12-43V range.

How do I determine if my LED array is compatible with the LDH-45A-1050?

The array must be specified for 1050mA constant current operation, and the total LED forward voltage must stay within the 12-43V CC range. The number of LEDs depends on the forward voltage of each LED, so there is no single fixed LED count that applies to every load.

Is the LDH-45A-1050 rated for harsh environmental conditions?

It is rated for operation from -40°C to +70°C (refer to the derating curve) at 20-90% RH non-condensing; no IP or waterproof rating is listed. It meets LVD safety standards EN61347-1 and EN61347-2-13 and is EAC approved.

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

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

Log in to see price

LDH-45A-1050 is the model of this series: rated current 1050mA, rated power 45.15W, typical efficiency 91%. Type Blank: PIN style, PWM+analog 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%
  • PWM + analog dimming and remote ON/OFF control [(Blank) type or W type]
  • Protections: Short circuit / Over voltage / Under voltage
  • Cooling by free air convection
  • Fully encapsulated
  • 3 years warranty
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