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Mean Well LDH-45A-500DA DC/DC LED Driver CC 500mA - Step-up
Overview
LDH-45A-500DA is the model of this series: rated current 500mA, rated power 43W, typical efficiency 90%.
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
- 500mA
- CURRENT ACCURACY(Typ.)
- ±5% at 12VDC input
- VOLTAGE RANGE Non-DALINote.2
- 12~86VDC
- VOLTAGE RANGE DALINote.2
- 24~86VDC
- NO LOAD OUTPUT VOLTAGE(max.)
- 100V
- RATED POWER
- 43W
- RIPPLE & NOISE (max.)Note.3
- 2.5Vp-p
INPUT
- RATED VOLTAGE
- 12VDC
- VOLTAGE RANGENote.2
- 9~18VDC
- EFFICIENCY (max.)
- 90%
- DC CURRENT (Typ.)
- 4.1A
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.)
- 100V 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-500DA for a 500mA LED downlight with a higher-voltage LED string?
Yes, if the downlight is a constant current 500mA load and its total LED forward voltage stays within 24-86V. This model is better suited to higher-voltage strings than lower-voltage constant current loads because its regulated range starts at 24V. The connected load must also stay within 43W.
Is this driver a fit for outdoor signage modules that need 500mA constant current?
It can be a fit for constant current signage modules operating at 500mA with a total forward voltage in the 24-86V range. The -40°C to +70°C operating range (refer to the derating curve) covers wide temperature swings, but no IP or waterproof rating is given, so the sign must protect it from water. It should not be used where the LED product expects fixed-voltage output.
Can the LDH-45A-500DA power a compact LED array that needs a boosted output voltage?
Yes, this is a step-up constant current driver with 500mA output, up to 86V output voltage, and a 24-86V constant current range. It works for small LED arrays that need a higher LED string voltage while staying inside the 43W limit. It is intended for constant current loads, not fixed-voltage LED assemblies.
How should I verify LED compatibility with the LDH-45A-500DA?
Your LED load must require constant current at 500mA, and the total forward voltage of the LED string must fall within 24-86V. The number of LEDs depends on each LED's forward voltage, so compatibility is based on the summed forward voltage rather than a fixed LED quantity. The driver is rated for 43W maximum.
Is the LDH-45A-500DA suitable for wet and temperature-variable locations?
It operates from -40°C to +70°C (refer to the derating curve) at 20-90% RH non-condensing, so it handles variable temperatures, but the datasheet gives no IP or waterproof rating. In wet locations it must be housed so that water and condensation cannot reach it. The housing dimensions are 75.0 × 53.0 × 22.7 mm.
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