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Mean Well LDH-45B-1050WDA DC/DC LED Driver CC 1050mA - Step-up
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Mean Well LDH-45B-1050WDA DC/DC LED Driver CC 1050mA - Step-up
Overview
LDH-45B-1050WDA 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-1050WDA for a 1050mA LED downlight with a 36-43V LED string?
Yes, if the downlight is designed for constant current operation at 1050mA and the total forward voltage falls within 36-43V. This model is a constant current driver, not a constant voltage power supply. Its output power is rated at 45.15W.
Is this driver suitable for 1050mA signage modules with a higher forward-voltage requirement?
It can be suitable when the signage module needs 1050mA constant current and operates within the 36-43V CC range. That makes it more specific to higher-voltage LED loads than the wider 21-43V versions. It should not be used for constant voltage signage modules.
Can the LDH-45B-1050WDA drive a small LED array that falls in the upper part of this series voltage range?
Yes, this model is intended for constant current LED arrays at 1050mA where the combined LED forward voltage is between 36V and 43V. Because its constant current window starts at 36V, lower-voltage arrays are outside its specified range. The number of LEDs depends on the forward voltage of each LED.
Will this driver hold up in wet or cold outdoor conditions?
The datasheet gives no IP or waterproof rating, and humidity is specified at 20-90% RH non-condensing, so it must be protected from water in outdoor use. Its operating temperature range is -40°C to +70°C (refer to the derating curve), so it is designed for both low and high ambient temperatures within that span. The rest of the lighting system should provide the needed protection.
How do I determine if my LED load is compatible with the LDH-45B-1050WDA?
The load must require 1050mA constant current and operate within the driver's 36-43V CC output range. The number of LEDs depends on each LED's forward voltage, so compatibility is based on total forward voltage rather than a fixed LED count. If the load is constant voltage, this driver is not the correct choice.
What separates the LDH-45B-1050WDA from the other 1050mA LDH-45B models?
The LDH-45B-1050WDA is a 45.15W, 1050mA wire-style model with a 36-43V CC range. The LDH-45B-1050DA has the same 36-43V range in pin style, while the LDH-45B-1050 and LDH-45B-1050W use a wider 21-43V CC range at the same 45.15W and 1050mA ratings. All four have a 43V output rating.
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