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Mean Well LDH-45B-1050 DC/DC LED Driver CC 1050mA - Step-up
Overview
LDH-45B-1050 is the model of this series: rated current 1050mA, rated power 45.15W, typical efficiency 95%.
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 24VDC input
- VOLTAGE RANGE Non-DALINote.2
- 21~43VDC
- VOLTAGE RANGE DALINote.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 RANGENote.2
- 18~32VDC
- EFFICIENCY (max.)
- 95%
- DC CURRENT (Typ.)
- 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 I use the LDH-45B-1050 for a 1050mA LED downlight module?
Yes, if the downlight is designed for constant current operation at 1050mA and its total LED forward voltage falls within the 21-43V constant current range. This driver is not for constant voltage LED products. Its 45.15W rating also needs to match the load requirement.
Is this driver suitable for signage modules that need constant current instead of constant voltage?
It can be suitable for signage modules that are specified for 1050mA constant current input and operate within the 21-43V CC output range. It should not be used as a constant voltage power supply. The driver is rated up to 45.15W.
Can this power a small LED array in a step-up design?
Yes, this is a step-up constant current LED driver with a 1050mA output and a 21-43V CC range. That makes it appropriate for a small LED array when the array is built for constant current operation and the combined forward voltage stays within that range. The exact number of LEDs depends on each LED's forward voltage.
Is the LDH-45B-1050 a good fit for outdoor or damp-location LED lighting?
The datasheet does not list an IP or waterproof rating, so for outdoor or damp locations it must be protected from water and condensation (humidity rating 20-90% RH non-condensing). The operating temperature range is -40°C to +70°C (refer to the derating curve), which supports use in both very cold and hot conditions. Final suitability still depends on the rest of the fixture.
How do I know if my LED load is compatible with this driver?
The LED load must be a constant current load rated for 1050mA, and the driver's CC output range is 21-43V. The number of LEDs it can run depends on the forward voltage of each LED, not on a fixed LED count. If the load needs constant voltage instead of constant current, this model is not the right match.
What is the difference between the LDH-45B-1050 and the other 1050mA LDH-45B versions?
Within the 1050mA LDH-45B group, the LDH-45B-1050 and LDH-45B-1050W are both 45.15W models with a 21-43V CC range, while the LDH-45B-1050DA and LDH-45B-1050WDA are 45.15W models with a narrower 36-43V CC range. The non-W versions are pin style, and the W versions are wire style. All four are rated for 43V output and 1050mA constant current operation.
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