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Mean Well LDH-45B-500DA DC/DC LED Driver CC 500mA - Step-up
Overview
LDH-45B-500DA 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 the LDH-45B-500DA be used for a 500mA constant current LED downlight array?
Yes, if the downlight array is designed for 500mA constant current operation. The full LED load must fall within the 36-86V CC output range and stay within the 43W maximum power.
Is this driver a fit for 500mA LED signage modules?
It can be a fit for constant current signage modules that are specified for 500mA. Because it is a constant current driver and not a constant voltage supply, the LED string's total forward voltage must be within 36-86V.
Can I use this driver with a small LED array that has a higher forward voltage string?
Yes, this step-up constant current model is intended for 500mA LED arrays within a 36-86V output range. That makes it better suited to higher-voltage 500mA arrays than lower-range CC drivers.
Is the LDH-45B-500DA suitable for outdoor or sealed fixture environments?
The datasheet does not list an IP or waterproof rating, so outdoors it must be mounted in a sealed fixture that keeps out water and dust. Its operating temperature range is -40°C to +70°C (refer to the derating curve), at 20-90% RH non-condensing humidity.
What should I check to confirm LED compatibility?
Confirm that the LED load needs 500mA constant current and that its total forward voltage falls within the 36-86V CC range. The number of LEDs depends on each LED's forward voltage, so there is no single fixed LED quantity for this driver.
What are the key differences in the LDH-45B-500 family?
LDH-45B-500 and LDH-45B-500W are both 500mA, 21-86V, 43W models, while LDH-45B-500DA and LDH-45B-500WDA are 500mA, 36-86V, 43W models. The main published differences are the CC voltage range and version suffixes, not the nominal wattage.
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