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Mean Well LDD-300HW DC/DC LED Driver CC 300mA - Step-down
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Mean Well LDD-300HW DC/DC LED Driver CC 300mA - 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 Rating15.6 Watt
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Output Voltage52 Volt
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Rated Current0.3 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-300HW for low-current LED downlights?
Yes, if the downlight requires a constant current driver at 300mA and the LED load stays within the 2-52V CC range. With a 15.6W rating, it is aimed at lower-power constant current fixtures rather than higher-power arrays. It is not a replacement for a constant voltage LED driver.
Is the LDD-300HW suitable for long-series small LED arrays?
It can be, because the constant current range extends up to 52V while maintaining a 300mA output. That wider CC range makes it useful for low-current arrays whose total forward voltage is higher than the low-voltage LDD-L and LDD-LW versions allow. The exact number of LEDs depends on the forward voltage of each LED.
Can this driver work for signage modules that need low current but higher LED string voltage?
Yes, when the signage module assembly is designed for 300mA constant current and the total LED load remains between 2V and 52V. Its 15.6W rating suits lower-power module assemblies, and the IP67 Waterproof construction supports harsher environments. It should only be used with constant current modules, not constant voltage signage systems.
How do I determine compatibility for the LDD-300HW?
Your LED load must be specified for 300mA constant current, with a total forward-voltage requirement inside the 2-52V CC range. The number of LEDs depends on each LED's forward voltage, so this driver cannot be matched by LED count alone. Because it is a step-down design, the input source must also stay within the listed 9-56VAC range.
How does the LDD-300HW compare with other 300mA LDD models?
At 300mA, the LDD-300H, LDD-300HS, and LDD-300HW all use a 2-52V constant current range and are rated at 15.6W. The LDD-300L and LDD-300LW are 9.6W with a 2-32V range, while the LDD-300LS is 8.4W with a 2-28V range. The key difference is the available CC voltage range and power, with the HW version in the higher-voltage 300mA group.
Is the LDD-300HW appropriate for outdoor or wide-temperature use?
Yes, it is rated IP67 Waterproof and operates from -40°C to +85°C. Those specs make it suitable for demanding environmental conditions when the rest of the assembly is built to the same standard. The compact 31.8 × 20.3 × 12.2 mm body can also help in sealed fixtures.
