6-40V na 1,2-35V, 20A CC/CV Buck Converter, step-down

DC-DC 300W Synchronous Rectification Non-Isolated Buck, Constant Current, Constant Voltage

Synchronous Rectification Non-Isolated Buck, Constant Current, Constant Voltage. High-power LED constant current drive, Lithium battery charging (including LiFePO4), 4V, 6V, 12V, 14V, 24V battery charging, Nickel-cadmium/Nickel-metal hydride battery (pack) charging, Solar panels, Wind turbines

Specification:

• Input Voltage: 6-40VDC
• Output Voltage: Continuously adjustable (1.2-35VDC), long-term use below 32V (Suitable for applications where input voltage is higher than output voltage; cannot boost voltage)
• Output Current: Max 20A, long-term use within 15A (Add a cooling fan if power tube temperature exceeds 65°C; please derate for high voltage output)
• Current Limit Range: 0.2-20A (Adjustable). Add a fan if module temperature exceeds 65°C.
• Minimum Dropout Voltage: 3V
• Switching Frequency: 150KHZ
• Conversion Efficiency: Up to approx. 96% (Efficiency depends on voltage dropout and usage environment)
• Output Ripple: Ripple approx. 50mV (excluding noise), 20M bandwidth (for reference only), measured at 24V input.
• Operating Temperature: -10℃ to +75℃ (Please monitor the power tube temperature during actual use; strengthen heat dissipation or derate if temperature is too high)
• Potentiometer Adjustment Direction: Clockwise (Increase), Counterclockwise (Decrease)
• Output Short Circuit Protection: Yes (Instantaneous protection) Constant Current (set to the current constant current value; cannot be short-circuited for a long time)
• Input Reverse Polarity Protection: No
• Output Reverse Current Protection: No, for loads with their own power source or inductive loads, an external diode is required!
• Connection Method: Terminal Block
• Module Dimensions: 60*53*30MM 

Wiring Diagram:

Product Usage
Output Current Adjustment Method:

1. Adjust the CV potentiometer to set the output voltage to your required value according to your load requirements.

2. Turn the CC potentiometer counterclockwise approx. 30 turns (i.e., set the output current to minimum). Connect the LED, then adjust the CC potentiometer to your desired current. For battery charging, use a fully discharged battery, connect it to the output, and adjust the CC potentiometer to your desired current. (For charging, it is essential to use a fully discharged battery for accurate adjustment, because the more remaining charge the battery has, the smaller the charging current will be.)