Torpedo is a switching power supply with battery charger for LiPo (configuration SEPIC). It has three different power sources (USB, battery and external); input voltage from 3 to 20 volts, the minimum current of 500 mA output with possibility of arriving at 1A and beyond with external source; conversion efficiency over 70%; charger for LiPo single cell incorporated; transition from battery power to another source without interruption; 5-V output with high stability under varying load and low ripple. The charger is built around the known integrated MCP73831-2, scheduled for charging single-cell LiPo batteries with 4.2 volts. A red LED indicates the state of charge (on for charging the battery, off for charging and off battery or flashing Pickup battery). Feeder connections: PWR is the output, BAT to attack the battery, the main PS1 and USB power supply IN of the USB power input.

Pay attention: respect the polarity of the battery. The reverse polarity causes damage to the device.