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Mean Well LDH-45B-500WDA DC/DC LED Driver CC 500mA - Step-up
Overview
LDH-45B-500WDA is the model of this series: rated current 500mA, rated power 43W, typical efficiency 94%.
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 24VDC input
- VOLTAGE RANGE Non-DALINote.2
- 21~86VDC
- VOLTAGE RANGE DALINote.2
- 36~86VDC
- NO LOAD OUTPUT VOLTAGE(max.)
- 100V
- RATED POWER
- 43W
- RIPPLE & NOISE (max.)Note.3
- 1.7Vp-p
INPUT
- RATED VOLTAGE
- 24VDC
- VOLTAGE RANGENote.2
- 18~32VDC
- EFFICIENCY (max.)
- 94%
- DC CURRENT (Typ.)
- 2.1A
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-45B-500WDA with a 500mA LED downlight array?
Yes, if the downlight array is designed for constant current operation at 500mA. This model delivers 500mA across a 36-86V constant current range with up to 43W, so the combined forward voltage of the LEDs must stay inside that window. It is not intended for constant voltage LED loads.
Is the LDH-45B-500WDA a good fit for high-voltage signage modules?
It can be, provided the signage modules are constant current modules rated for 500mA. The 36-86V output range makes it better suited to higher-forward-voltage strings than lower-voltage constant current loads. For signage products that require constant voltage input, a constant voltage driver is the correct choice instead.
Can this model power a compact outdoor LED array?
It can, if the outdoor housing keeps it dry: the datasheet gives no IP or waterproof rating, and the operating range is -40°C to +70°C (refer to the derating curve). Electrically, the array must be a 500mA constant current load within the 36-86V output window. Its maximum output power is 43W.
What should I check before pairing LEDs with the LDH-45B-500WDA?
Check that your LEDs are meant for 500mA constant current drive and that their combined forward voltage falls within 36-86V. The actual number of LEDs depends on each LED's forward voltage, so there is no single fixed LED count for this model. This driver should not be paired with strips or modules that require constant voltage.
Is the LDH-45B-500WDA suitable for exposed or harsh conditions?
It operates from -40°C to +70°C (refer to the derating curve) at 20-90% RH non-condensing, but no IP or waterproof rating is given, so the enclosure must keep out splashing and weather. The housing remains compact at 75.0 × 53.0 × 22.7 mm. Environmental suitability does not change the need to keep the LED load within the 36-86V constant current range.
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