Product: D-PLANET [4-PACK] 5A DC-DC Adjustable Buck Converter 4~38v to 1.25-36v Step Down Power Supply High Efficiency Voltage Regulator Module
Brand: dkplnt
Product Features

 This product is a 180 KHz fixed frequency PWM buck (step-down) DC/DC module,capable of driving a 5A load with high efficiency, low ripple and excellent line and load regulation. 

Parameters:
 Input Voltage: DC 4-38V, error ±0.1V 
 Output Voltage: DC 1.25V to 36V 
 Output Current: 5A(MAX) It is recommended to use under 4.5A (NOTE: When using high power, add a heat sink to the power supply chip)
 Size: 5.4x2.3x1.8CM 
 Weight: 16g 

  Fuction:
 1.Built in over-temperature protection function 
2.Built in current limit function 
3.Built in output short-circuit protection function 

 How to use
 1.Access the power supply (4-38V), the power indicator light, the module is working properly.
 2.Adjust the blue potentiometer knob (usually clockwise rotation boost, counterclockwise rotationStep-down) and monitor the output voltage with a multimeter to reach the required voltage. 
 3.A customer reflects the module output voltage can not be adjusted, always equal to the input voltage. When you encounter this problem, please first counterclockwise rotation potentiometer 10 laps above, and then use the module can be normal adjustment of the voltage.
Input voltage range：4～38V (Note:input voltage not over 38V)
Output voltage range：1.25-36VDC adjustable.Output current: 0-5A,Output power: 75W
High conversion efficiency up to 96%
Updated Version: updated from LM2596 and better than it, with reverse voltage protection, over-temperature and short-circuit protection, thus making it much safer to use
100% SATISFICATION SERVICE: If there are any problem with our products, please feel free to contact us. you can request a refund for any single module and no need to return it.; Any problems you can contact us and we will try our best to resolve it till you satisfied.

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