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Mean Well LDD-300LW DC/DC LED Driver CC 300mA - Step-down
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Mean Well LDD-300LW DC/DC LED Driver CC 300mA - Step-down
Description
Description
Features
| DC/DC step-down converter |
| Constant current output: 300mA to 700mA |
| Wide input voltage: 9~36VDC |
| Wide output LED string voltage: 2~32VDC |
| High efficiency up to 95% |
| Built-in EMI filter, comply with BS EN/EN55015 and FCC part15 without additional input filter and capacitors |
| Built-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 |
| Compact size |
| Low cost, high reliability |
| Suitable for driving illumination LED |
| 3 years warranty |
General Specification
| Current accuracy | ±5% at 24VDC input |
| Over temperature protection | Protection type : Shut down, recovers automatically after temperature goes down |
| Efficiency | 95% at full load and 24VDC/36VDC input for LDD-300~700L/LW ; 95% at full load and 24VDC input for LDD-300~700LS |
| Short circuit protection | Protection type: Can be continued, recovers automatically after fault condition is removed |
| 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) | 22.6*9.9*8.9mm or 0.89"*0.39"*0.35" inch for LDD-300~700L/LW ; 25.4*10.5*9.3mm or 1"*0.4135"*0.366" inch for LDD-300~700LS |
| Potting material | Expoxy(UL94-V0) for LDD-300~700L/LW ; without potted for LDD-300~700LS |
Specifications
Specifications
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BrandMean Well
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SeriesLDD Series
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Power Rating9.6 Watt
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Output Voltage32 Volt
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Rated Current0.3 Ampere
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Input Voltage9V~36V
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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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Length0.89 in
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Width0.39 in
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Height0.35 in
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Weight0.04 lb
File Downloads
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Payment & Security
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Frequently Asked Questions
Can I use the LDD-300LW for compact low-current LED downlights?
Yes, if the downlight is a constant current design that requires 300mA and the LED load stays within the 2-32V CC range. Its 9.6W rating makes it a fit for lower-power downlight assemblies. It should not be used where the fixture expects a constant voltage driver.
Is the LDD-300LW a good fit for very small LED arrays or indicator-style lighting?
It can be, because it provides 300mA constant current across a 2-32V range in a compact 22.6 × 9.9 × 8.9 mm package. That makes it useful for smaller constant current LED arrays where space is tight. The exact LED quantity depends on the forward voltage of each LED.
Can the LDD-300LW be used with small waterproof signage modules?
Yes, if the signage module assembly is specified for 300mA constant current and the total LED forward-voltage requirement falls between 2V and 32V. The IP67 Waterproof rating supports use in exposed or moisture-prone locations. It is not the right match for constant voltage signage modules.
How do I check whether my LEDs are compatible with the LDD-300LW?
The load must require 300mA constant current and have a total forward-voltage requirement within the 2-32V CC output range. The number of LEDs depends on each LED's forward voltage, so a fixed LED count should not be assumed. Since this is a step-down driver, the input source also needs to stay within the 9-36VAC range.
How is the LDD-300LW different from other 300mA LDD siblings?
Within the 300mA family, the LDD-300H, LDD-300HS, and LDD-300HW are 15.6W with a 2-52V range, while the LDD-300L and LDD-300LW are 9.6W with a 2-32V range. The LDD-300LS is 8.4W with a 2-28V range. The main differences are the maximum constant current voltage range, wattage, and package style.
Is the LDD-300LW suitable for harsh temperature and moisture conditions?
Yes, it is rated IP67 Waterproof and has an operating temperature range of -40°C to +85°C. Those specs support use in demanding environments when the full fixture or system is designed accordingly. Its 0.02 kg weight and small body help where enclosure space is limited.
