It is a Power Supply Module/Adapter/Charger/PWM Controller,  Input Voltage: DC 4.5~30V, Output Voltage: DC 0.8~30V, Output Constant Current Range: 0.1~5A, Application: DIY Power adapter/Charger, industrial equipments, electronic equipment, Communications Equipment, Power Tools, Car Driving Recorder, Car GPS, Car audio, LCD TV, Advertising screen, LED lights, Fan, intercom and monitor system, etc.

• Module properties: non-isolated step-down module (BUCK)
• Input Voltage: DC 4.5~30V
• Output Voltage: DC 0.8~30V
• Output Constant Current Range: 0.1~5A
• Operating temperature: -40°c to +85°c
• Working frequency: 300KHz
• PWM control frequency range: 100-300Hz
• Conversion efficiency: up to 95%
• Short circuit protection: YES ( the Limit current is the Setting constant current value)
• Over-temperature protection: Yes (Over-temperature Automatically shuts down the output)
• Input reverse polarity protection: None ( please install diode at input port )
• Output anti irrigation protection: None ( please follow the picture to install the Anti-irrigation diode )
• Charging indication: charging Red light, full charged Green light
• Installation: four 3mm screws
• Wiring: Connection: V-IN input, V-OUT output
• Dimensions: 60 x 26 x 20mm

• DIY voltage Regulator, with constant current, can protect the load.
• The power supply for electronic equipment.
• For a variety of battery charging, Setting the charging voltage and charging current according to the different voltage and battery capacity, with charging indicator,
• convenient to observe the state of charge.
• solar panels power supply for battery charging, With constant current, which prevents battery overcharge.
• Driver high-power LED, Free series-parallel combination, With PWM control input, Available SCM to Control the LED brightness (PWM control frequency range 100-300Hz).
• Use as a car power supply, Power supply for electronic equipment.

• 1 x DC Buck Converter ( Power Supply Module/Voltage Regulator/Adapter/Charger )