MEAN WELL LDD-300LW DC/DC Constant Current LED Driver, 9-36 VDC Input, 300 mA, 2-30 VDC Output, IP67

DC/DC constant current LED driver delivering a stable 300 mA output with an efficiency up to 95%. The LDD-300LW accepts a wide 9-36 VDC input, making it ideal for battery-powered and low-voltage lighting systems. Its buck topology ensures precise current regulation for LED strings up to 30 VDC, while PWM and analog dimming (1-10VDC) enable smooth brightness control. Housed in a compact, wire-lead package with IP67 protection, it withstands harsh environments and operates from -40 to +70 °C.

Advantages

High efficiency up to 95% reduces heat and energy waste. Wide input voltage range supports 12V and 24V systems. Both PWM and analog dimming offer flexible control. IP67-rated for dust-tight and waterproof installations. Non-isolated buck design keeps size and cost low. Built-in short circuit and over-temperature protection enhance reliability. Certified to UL, CUL, CE, and FCC standards.

Suitable for

• LED strip and module lighting in architectural and decorative applications
• Outdoor signage and landscape lighting exposed to moisture
• Automotive and marine LED lighting powered by 12V/24V batteries
• Industrial machine vision and inspection lighting
• Retail display lighting requiring dimming control

Key specifications

• Input voltage: 9 - 36 VDC
• Output current: 300 mA constant
• Output voltage: 2 - 30 VDC
• Maximum output power: 9 W
• Efficiency: up to 95%
• Dimming: PWM + analog (1-10VDC)
• Protection: short circuit, over temperature
• Operating temperature: -40 to +70 °C
• IP rating: IP67
• Mounting: wire leads
• Certifications: UL, CUL, CE, FCC

Recommendations

For best results, pair the LDD-300LW with a regulated DC power supply within the 9-36 V range. Ensure adequate heat dissipation in enclosed fixtures. Use twisted pair wiring for PWM dimming signals to minimize noise. Verify LED forward voltage total does not exceed 30 VDC at 300 mA.