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Mean Well LDD-350HW DC/DC LED Driver CC 350mA - Step-down
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Mean Well LDD-350HW DC/DC LED Driver CC 350mA - Step-down
Description
Description
Features
| DC/DC step-down converter |
| Constant current output: 300mA to 1500mA |
| Wide input voltage: 9~56VDC |
| Wide output LED string voltage: 2~52VDC |
| High efficiency up to 97% |
| Built-in EMI filter, comply with BS EN/EN55015 and FCC part15 without additional input filter and capacitors |
| Build-in PWM and remote ON/OFF control |
| Protections: Short circuit/Over temperature |
| Cooling by free air convection |
| Fully encapsulated with IP67 level for pin and wire style |
| Non-potted, optional conformal coating for SMD style(HSC type) |
| Compact size |
| Low cost, high reliability |
| Suitable for driving illumination LED |
| 3 years warranty |
General Specification
| Current accuracy | ±3% at 24VDC input ; ±4% at 48VDC input for LDD-H/HW ; ±5% for LDD-HS |
| Over temperature protection | Protection type : Shut down, recovers automatically after temperature goes down |
| Efficiency | 97% at full load and 36VDC/48VDC input for LDD-H/HW ; 96% at full load and 36VDC/48VDC input for LDD-HS(typical) |
| Short circuit protection | Regulated at rated output current |
| Working temperature | -40°C to +85°C |
| EMC | Compliance to EN55015 class B, EN61000-4-2,3,4,6,8, EAC TP TC 020 |
| Temp. Coefficient | ±0.03% / °C |
| Dimension (LxWxH) (mm) | 31.8*20.3*12.2mm or 1.25"*0.8"*0.48" inch for LDD-H/HW ; 31.8*20.3*11.4mm or 1.25"*0.8"*0.45" inch for LDD-HS |
| Potting material | Expoxy(UL94-V0) for LDD-H/HW ; without potted for LDD-HS |
Specifications
Specifications
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BrandMean Well
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SeriesLDD Series
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Power Rating18.2 Watt
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Output Voltage52 Volt
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Rated Current0.35 Ampere
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Input Voltage9V~56V
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No of Output1
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Dimming ControlPWM
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Standards MetCE,EAC
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Operation ModeConstant Current
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Operating Temperature-40°C~85°C
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Warranty3 Year
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Length1.25 in
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Width0.8 in
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Height0.48 in
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Weight0.04 lb
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Frequently Asked Questions
Can I use the LDD-350HW for a 350mA LED downlight with a higher forward voltage string?
Yes, this model is useful for 350mA constant current downlight loads that need a wider voltage window. Its constant current range is 2-52V with up to 18.2W, so it supports higher-voltage LED strings than the 3-45V versions.
Is the LDD-350HW a good fit for LED signage modules?
It can be used for signage modules that are specified for 350mA constant current operation. The load needs to remain within the 2-52V constant current range, and this driver should not be used as a constant voltage source.
Can this model power a small LED array in a compact housing?
Yes, it is designed for compact constant current LED systems and measures 31.8 × 20.3 × 12.2 mm. The LED array must be a 350mA load with a total forward voltage inside 2-52V and a total load within 18.2W.
How do I size LED strings for the LDD-350HW?
This driver delivers 350mA constant current over a 2-52V range. The number of LEDs depends on each LED's forward voltage, so you size the string by total forward voltage rather than assuming a specific LED count.
Can the LDD-350HW handle outdoor or industrial temperature swings?
It is rated IP67 and has an operating temperature range of -40°C to +85°C. That makes it suitable for sealed LED assemblies that may see water exposure, dust, and wide temperature variation.
How does the LDD-350HW differ from other 350mA LDD options?
At 350mA, LDD-350H, LDD-350HS, and LDD-350HW are 18.2W with a 2-52V constant current range, LDD-350H-DA and LDD-350H-WDA are 15.75W with a 3-45V range, LDD-350L and LDD-350LW are 11.2W with a 2-32V range, and LDD-350LS is 9.8W with a 2-28V range. The LDD-350HW matches the highest 350mA voltage range and power in the wire-style version.
