SparkFun Power Cell LiPo Charger/Booster

The PowerCell board is a single-cell LiPo boost converter (to 3.3V and 5V) and micro USB charger in one. The board comes with a JST connector for a single-cell LiPo battery, a micro USB port for the 5V charging input, and selectable 3.3V and 5V output pins (labeled 'out'). Additionally, two charging pins (labeled 'charge') are broken out, allowing you to use another 5V power source to charge the batteries if you do not have a micro USB cable.

We have also broken out the power-save and activation pins, giving you full control over the regulator. The undervoltage lockout release is also tied to a solder bridge, so you can disable it if desired.

The micro USB charger uses the MCP73831 and allows charging of 3.7V LiPo cells at a maximum charging rate of 100mA. If you want to charge at a faster rate, you will need to connect a separate power supply to the pins labeled '5V' and 'GND' under the 'charge' label.

The boost converter is based on the TPS61200 from TI and features jumpers for selectable 5V and 3.3V outputs, as well as an undervoltage protection at 2.6V (which can be disabled via a solder bridge on the back of the PCB).

Note: This board does not have reverse polarity protection, so please be careful to recognize the polarity of your connections!

Dimensions: 1.03 x 0.95"

Features:

* MCP73831 single-cell LiPo charger with 500mA
* TPS61200 boost converter
* Selectable output voltage of 3.3 or 5V
* 5V at a maximum of 600mA
* 3.3V at a maximum of 200mA
* Undervoltage lockout at 2.6V (with lockout bypass)
* Quiescent current, less than 55uA
* JST connector for LiPo battery
* Micro USB port for the charging power source
* Inductor: 4.7uH, 1.2A Sumida CDRH2D18
* Over-temperature protection.