Mean Well NLDD-1400H DC/DC Step-Down Constant Current LED Driver 6-50V Input, 2-48V Output, 1400mA, PWM Dimming, PCB Mount

LED lighting designers and electronics engineers often need a compact, efficient way to drive high-power LEDs from a wide range of DC sources. The Mean Well NLDD-1400H is a non-isolated step-down (buck) DC/DC converter that delivers a constant current of 1400 mA, making it ideal for powering LED modules in architectural lighting, signage, and industrial illumination systems. Its wide input voltage range of 6 to 50 VDC accommodates various DC buses, while the output voltage can vary from 2 to 48 VDC to match the LED string forward voltage.

Key specifications

• Input voltage: 6 - 50 VDC
• Output current: 1400 mA (1.4 A)
• Output voltage: 2 - 48 VDC
• Topology: Step-down (Buck)
• Output type: Constant Current (CC)
• Dimming: PWM dimming
• Efficiency: Up to 96%
• Protection: Short circuit, over temperature
• Operating temperature: -40 to +65 °C
• Isolation: Non-isolated
• Control: Remote ON/OFF
• Mounting: Through hole / PCB mount
• Series: NLDD
• Number of outputs: 1

Why choose it

The NLDD-1400H combines high efficiency with a compact PCB-mount design, reducing heat generation and simplifying thermal management in space-constrained luminaires. Its PWM dimming capability allows precise brightness control, while built-in short-circuit and over-temperature protection enhance system reliability. The wide operating temperature range ensures stable performance in demanding environments.

Ideal use cases

• LED strip and module driving in architectural lighting
• Signage and channel letter illumination
• Industrial and task lighting with DC power sources
• Portable or battery-powered LED systems

Good to know

As a non-isolated converter, the NLDD-1400H requires careful design consideration for safety and EMI compliance. It is intended for integration into end products by qualified professionals. The unit is sold individually and does not include additional accessories.