300W 20A DC-DC Buck Converter Step Down Module Constant Current LED

Discover the 300W 20A DC-DC Buck Converter Step Down Module Constant Current LED — a standout decor pick featuring adjustable design for dependable, everyday performance.

Specifications

Current Type: DC

EU LVD Voltage: Low voltage: Below 50Vac or 75Vdc

Type: Other

is_customized: No

Product Selling Points:

1. Guaranteed product quality

2. User-friendly operation

3. Stable performance

4. Exquisite appearance

5. Wide range of applications

Introduction to Synchronous Rectification Technology:

Synchronous rectification is an innovative technique that replaces rectifier diodes with specialized power MOSFETs featuring extremely low on-state resistance to reduce rectification losses. It significantly enhances the efficiency of DC/DC converters and eliminates the dead-time voltage caused by the Schottky barrier voltage. Power MOSFETs are voltage-controlled devices exhibiting linear voltage-current characteristics during conduction. When used as rectifiers, the gate voltage must synchronize with the phase of the rectified voltage to complete rectification, hence the term “synchronous rectification.” Synchronous rectification technology substantially reduces rectification losses at the output stage of switching power supplies, thereby improving conversion efficiency and lowering the power supply's self-heating.

Module Parameters:

Module Type: Synchronous Rectification Non-Isolated Buck Constant Current Constant Voltage Module CC CV Charging Module

Input Voltage: DC 6-40V

Output Voltage: Continuously adjustable (1.2-35VDC), sustained operation below 32V (suitable for applications where input voltage exceeds output voltage; cannot boost voltage)

Output Current: Max 20A, continuous 15A (Add fan cooling if power transistor temperature exceeds 65°C; derate for high-voltage outputs)

Current Limit Range: 0.2-20A (adjustable). Add fan if module exceeds 65°C.

Minimum Dropout Voltage: 3V

Operating Frequency: 150kHz

Conversion Efficiency: Up to ~96% (efficiency depends on voltage drop and operating environment)

Output Ripple: Approx. 50mV ripple (excluding noise) at 20MHz bandwidth (for reference only). Measured at 24V input.

Operating Temperature: -10°C to +75°C (Monitor power transistor temperature during actual use. Enhance cooling or derate if temperatures are excessively high).

Potentiometer Adjustment Direction: Clockwise (increase), counterclockwise (decrease).

Output Short-Circuit Protection: Yes (instantaneous protection). Constant current (currently set constant current value cannot be short-circuited for extended periods).

Input Reverse Polarity Protection: No.

Output Reverse Current Protection: No. For loads with built-in capacitance or inductive loads, an external diode is required!

Wiring Method: Terminal blocks

Output Current Adjustment Method:

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

2. Turn the CC potentiometer counterclockwise approximately 30 turns (setting output current to minimum). Connect an LED and adjust the CC potentiometer to your desired current. For battery charging: fully discharge the battery before connecting it to the output. Adjust the CC potentiometer to your desired charging current. (For charging accuracy, always calibrate with a fully discharged battery, as remaining charge reduces required charging current.)

Package Contents:

Step-Down Converter Module*1

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