Mean Well NLDD-1400HW DC/DC Step-Down LED Driver 1.4A 2-48V 6-50V Input

The NLDD-1400HW from Mean Well is a non-isolated step-down DC/DC LED driver that delivers a constant 1.4 A output current with high efficiency up to 96%. Unlike many drivers that require AC input, this unit operates directly from a 6–50 VDC source, making it ideal for low-voltage LED lighting systems, battery-powered applications, or DC bus architectures. Its 3-in-1 dimming capability (0-10 VDC, PWM, or resistance) provides flexible brightness control without additional hardware.

Highlights

• Wide DC input range: 6–50 VDC
• Constant output current: 1.4 A (1400 mA)
• Output voltage range: 2–48 VDC
• High efficiency up to 96%
• 3-in-1 dimming: 0-10 VDC, PWM, resistance
• Compact through-hole SIP package
• Free air convection cooling
• Short circuit and over temperature protection

In daily use

Designed for integration into LED luminaires and custom lighting systems, the NLDD-1400HW provides stable current regulation across a wide output voltage range. Its non-isolated buck topology ensures minimal power loss, and the wide operating temperature range from -40°C to +65°C (case) suits demanding environments. The 3-in-1 dimming interface allows precise light control using standard dimming signals, making it compatible with many lighting controllers.

Full specifications

• Input voltage range: 6–50 VDC
• Output current: 1.4 A ±3%
• Output voltage range: 2–48 VDC
• Efficiency: up to 96%
• Dimming: 0-10 VDC, PWM, resistance
• Protections: short circuit, over temperature
• Operating temperature (case): -40°C to +65°C
• Storage temperature: -40°C to +85°C
• Switching frequency: 330 kHz
• No load power consumption: <0.5 W
• MTBF: >1,800,000 hours
• Mounting: through-hole (SIP)
• Cooling: free air convection

Final note

With its compact size, high efficiency, and flexible dimming options, the NLDD-1400HW is a reliable choice for low-voltage LED driving applications where space and thermal management are critical.