DC/DC Step-Down Regulator Module - 9A, 300W

The DC/DC Step-Down Regulator Module is a non-isolated CC/CV buck converter for adjustable power conversion. It supports an input voltage of 7V-32V and a continuously adjustable output voltage of 0.8V-28V. The module provides up to 9A output current and a maximum output power of 300W. It includes short-circuit protection and adjustable constant current control. The module is designed for terminal wiring and features a dual-color indicator.

Features of DC/DC Step-Down Regulator Module - 9A, 300W

• Non-isolated CC/CV module
• Adjustable output voltage
• Adjustable constant current
• Short-circuit protection
• Dual-color indicator
• Terminal wiring
• High output power
• High conversion efficiency

Specifications of DC/DC Step-Down Regulator Module - 9A, 300W

• Module size: 65 x 47 x 23.5 mm
• Input voltage: 7V-32V
• Output voltage: 0.8V-28V continuously adjustable
• Output current: 9A max
• Constant current range: 0.2A-9A adjustable
• Conversion efficiency: up to about 95%
• Output power: 300W max
• Operating frequency: 300KHz
• Output ripple: 20M bandwidth
• Work temperature: industrial grade (-40 degree to +80 degree)
• No-load current: typical 20mA
• Module properties: non-isolated step-down constant current, constant voltage module (CC CV) charging module
• Lowest pressure: 1V
• Input 24V output 12V 5A ripple around 50mV (excluding noise)
• Output short circuit protection: Yes, constant current
• Input reverse polarity for protection: None
• Output prevent backflow: None
• Wiring: Terminal
• Load regulation: ± 1% (constant)
• Voltage regulation: ± 1%
• Dynamic response speed: 5% 200uS
• Potentiometer adjustment direction: clockwise increase, counterclockwise decrease
• Potentiometer CV location: close to input voltage for voltage adjustment
• Potentiometer CC location: close to output voltage for current adjustment
• Operating temperature: industrial grade (-40 °c to +85 °c)
• Indicator: dual color indicator, red charging light, green fully charged light
• Max output current: 12A
• Fixed turn lamp current: 0.1 times the current value
• Current sensing resistor: high-precision current sensing resistor
• Temperature drift: less than 1% at 20° to 100° constant current 1A
• Four high frequency capacitance included
• Package includes: 1 Pcs DC Buck Converter Module

How to Use DC/DC Step-Down Regulator Module - 9A, 300W

1. Set the required input voltage, float voltage, and charging current.
2. Adjust the constant voltage potentiometer to about 5V.
3. Measure output short-circuit current with a multimeter on the 10A current scale and set the current potentiometer.
4. Adjust the constant voltage potentiometer to the float voltage or maximum LED operating voltage.
5. Connect the battery or LED and test the output.

More Info

• Suitable for battery charging and LED constant current drive.
• Applications listed include vehicle-mounted power supply and low voltage system power supply.
• Applications listed include 6V, 12V, 14V, and 24V battery charge.