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Mean Well LDDS-250HW DC/DC LED Driver CC 250mA - Step-down Wire Type
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Mean Well LDDS-250HW DC/DC LED Driver CC 250mA - Step-down Wire Type
Overview
LDDS-250HW is the model of this series: typical efficiency 94%. Type Blank: Remote ON/OFF control.
LDDS-H series is a 45W DC/DC LED driver featuring constant current output. LDDS-H operates from 12~56VDC and offers models with different rated current ranging between 250mA and 1000mA. With the high efficiency up to 96%, The 94V-0 flame retardant plastic case with fully-potted to enhance the heat dissipation allows this series to fit for class Ⅲ commercial track light or DC bus lighting application.
Features
- DC/DC step-down converter
- Constant current output: 250mA to 1000mA
- Wide input voltage: 12 ~ 56VDC(48V typ.)
- Wide output LED forward string voltage: 2 ~ 45VDC
- High efficiency up to 96%
- Built-in EMI filter, comply with BS EN/EN55015
- Remote ON/OFF control.
- Protections: Short circuit / Over temperature / Over current
- Cooling by free air convection
- Compact size and Fully encapsulated
- Suitable for driving illumination LED
- 5 years warranty
Specifications
OUTPUT
- CURRENT RANGE
- 250mA
- VOLTAGE RANGENote.4
- 2 ~ 45VDC
- CURRENT ACCURACY (Typ.)
- ±5% at 48VDC input (or 24VDC)
- RIPPLE & NOISE(max.)Note.2
- 150mVp-p
- SWITCHING FREQENCY
- 40KHz ~ 1000KHz
- EXTERNAL CAPACITANCE LOAD (max.)
- 2.2uF
INPUT
- VOLTAGE RANGE
- 12 ~ 56VDC
- EFFICIENCY (Typ.)Note.3
- 94%
- DC CURRENT Full loadNote.3
- 200mA
- DC CURRENT No load
- 6mA
- FILTER
- Capacitor
REMOTE ON/OFF & 3 IN 1 DIMMING
- REMOTE ON/OFF
- Leave open if not use Power ON with dimming: DIM ~ -Vin >2.5 ~ 15VDC or open circuit Power OFF : DIM ~ -Vin < 0.3VDC or short
PROTECTION
- SHORT CIRCUIT
- Regulated at rated output current Protection type: Can be continued, recovers automatically after fault condition is removed
- OVER TEMPERATURE
- Tj 150℃ typically(IC1) detect on main control IC Protection type : Shut down, recovers automatically after temperature goes down
ENVIRONMENT
- WORKING TEMP.
- -40 ~ + 55℃(Refer to derating curve) @ full load
- WORKING HUMIDITY
- 20% ~ 90% RH non-condensing
- STORAGE TEMP., HUMIDITY
- -55 ~ +125℃, 10 ~ 95% RH
- TEMP. COEFFICIENT
- ±0.03% / ℃
- VIBRATION
- 10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
- OPERATING CASE TEMP. (max.)
- 90℃
SAFETY & EMC
- SAFETY STANDARDS
- EAC TP TC 020/2011 approved
- EMC EMISSION
- Compliance to BS EN/EN55015, EAC TP TC 020
- EMC IMMUNITY
- Compliance to BS EN/EN61000-4-2,3,4,6,8, light industry level, criteria A, EAC TP TC 020
OTHERS
- MTBF
- 650Khrs min. MIL-HDBK-217F (25℃)
- DIMENSION
- 47*12*7mm or 1.85"*0.47"*0.28" inch (L*W*H)
- PACKING
- LDDS-HW: 9.5g, 36pcs/box, 0.43kg/box. 12 box per carton/6kg LDDS-HWB: 9.4g, 36pcs/box, 0.43kg/box. 12 box per carton/6kg
- POTTING MATERIAL
- Expoxy(UL94-V0)
MODEL ENCODING
- Blank (this model)
- Remote ON/OFF control
- B
- 3 in 1 Dimming function
Test conditions and notes5
- 1.All parameters are specified at normal input(48VDC), rated load, 25℃ 70% RH ambient.
- 2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1μf capacitor.
- 3.Test condition: 48VDC input, 36VDC output without Dimming.
- 4.Output voltage will always step down 4 volts from input DC voltage.
- 5.The output of LDDS-H should not be connected to the input of the same unit or output from other sources.
Technical drawings
Typical applications
- DC battery source lighting
- Portable lighting
- Commercial lighting
- DC 48V Track lighting
- DC 24V landscape lighting
- For STUCCHI track adapters
- For class Ⅲ application(SELV)
Downloads
FAQ
Can I use the LDDS-250HW for a 250mA LED downlight?
Yes, if the downlight is a constant-current type that requires 250mA and the LED load stays within the 2-45V output range. This is a step-down constant-current driver, so it should not be paired with a constant-voltage LED product.
Is the LDDS-250HW a good fit for low-current signage modules?
It is intended for constant-current LED loads at 250mA, which can include lower-current signage modules if their operating range fits within 2-45V. Its compact 47 x 12 x 7 mm epoxy-potted body suits tight sign housings when the rest of the system is matched correctly.
Can the LDDS-250HW power a small LED array for compact lighting?
Yes, if the array is built for constant-current operation at 250mA and the total forward voltage remains inside the 2-45V range. The usable LED quantity depends on the forward voltage of each LED rather than a fixed number.
Will the LDDS-250HW work with LED strips?
Only if the strip or module is a constant-current design that expects 250mA. Standard constant-voltage LED strips are not a match, because this driver provides constant current over a 2-45V output range.
Is the LDDS-250HW suitable for outdoor or cold-weather use?
The operating temperature range is -40°C to +55°C at full load, which supports cold-weather use. The datasheet gives no IP rating and specifies 20% to 90% RH non-condensing, so it is not specified for exposed outdoor or wet locations.
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