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Mean Well LDH-45A-1050DA DC/DC LED Driver CC 1050mA - Step-up
Overview
LDH-45A-1050DA 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 I use the LDH-45A-1050DA for a 1050mA LED downlight array?
Yes, if the downlight array is designed for constant current operation at 1050mA and its total forward voltage stays within the 24-43V constant current range. This is a constant current step-up driver, so it is intended for LED loads rather than constant voltage LED tape or strips.
Is the LDH-45A-1050DA suitable for powering signage LED modules?
It can be suitable for signage modules only when the modules are constant current types rated for 1050mA and the total LED forward voltage falls inside the 24-43V CC range. It is not the right match for constant voltage signage modules that expect a fixed voltage supply.
Can this driver run a small high-power LED array in an enclosed outdoor fixture?
It can, provided the fixture protects the driver from water: the datasheet gives no IP or waterproof rating, and the operating temperature range is -40°C to +70°C (refer to the derating curve). The LED array still needs to be a 1050mA constant current load that operates within the 24-43V output range and 45.15W power limit.
How do I know if my LED load is compatible with the LDH-45A-1050DA?
Match the load to 1050mA constant current output and make sure the combined LED forward voltage is within 24-43V. 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.
How does the LDH-45A-1050DA compare with other 1050mA LDH series models?
Within the 1050 output-current group, LDH-45A-1050 and LDH-45A-1050W are 45.15W models with a 12-43V CC range, while LDH-45A-1050DA and LDH-45A-1050WDA are 45.15W models with a 24-43V CC range. LDH-45B-1050 and LDH-45B-1050W are 45.15W with a 21-43V CC range, and LDH-45B-1050DA and LDH-45B-1050WDA are 45.15W with a 36-43V CC range.
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