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Mean Well LDH-45A-1050W DC/DC LED Driver CC 1050mA - Step-up
Overview
LDH-45A-1050W 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
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. 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
Downloads
FAQ
Can the LDH-45A-1050W be used for a constant current LED downlight?
Yes, this model is intended for constant current LED loads at 1050mA, including LED downlights whose total forward voltage is within the 12-43V CC range. It should not be used in place of a constant voltage power supply for LED products that require fixed-voltage input.
Is this a good fit for compact signage lighting that uses high-power LEDs?
It can be, provided the signage lighting uses a 1050mA constant current LED load and the total forward voltage stays between 12V and 43V. With 45.15W available, it is intended for higher-power constant current LED applications rather than low-power constant voltage modules.
Can I use the LDH-45A-1050W for a small LED array in a sealed fixture?
Yes, a sealed fixture suits it, since the datasheet gives no IP or waterproof rating for the driver itself; the operating temperature range is -40°C to +70°C (refer to the derating curve). The LED array still must be a 1050mA constant current load within the 12-43V CC range.
What kind of LED load matches the LDH-45A-1050W?
The correct match is a constant current LED load rated at 1050mA with a total forward voltage from 12V to 43V. The number of LEDs depends on each LED forward voltage, so the key check is whether the full LED string stays within that CC output range.
What is the difference between the LDH-45A-1050W and the other 1050 output-current LDH models?
LDH-45A-1050 and LDH-45A-1050W are both 45.15W models with a 12-43V CC range, while LDH-45A-1050DA and LDH-45A-1050WDA shift to a 24-43V CC range at the same 45.15W. LDH-45B-1050 and LDH-45B-1050W use a 21-43V CC range, and LDH-45B-1050DA and LDH-45B-1050WDA use 36-43V.
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