It use a MCP7386 (U4) for recharging the battery and a LTC3402EMS (U2) for converting the voltage up to 5V.

I decide to make it for a little cam recorder that use a raspberry pi zero.

The connector makes available the following voltages:

1: +Vbat, the positive terminal of the battery

2: SW1, terminal for an external switch for detaching the battery from the boost converter and consequently turn off the power supply. It's connected to the same terminal as the Vbat.

3: SW2, the other terminal for the external switch.

4: +5V the output voltage of the boost converter

5: GND

6: GND

The diodes D1, D2, D5 are used for showing the status of the battery.

The connector J4 is a mini USB connector for providing the voltage and recharge the battery.

The BOM is the following:









































Apr 13,2019
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