SparkFun LiPo Charger/Booster ‐ 5V/1A 

PRT‐14411 

 

Description 

The SparkFun 5V/1A LiPo Charger/Booster is a no-nonsense circuit for

generating one amp from a Lithium Polymer battery at 5V. This LiPo

charger is a very economical choice that is equipped with a simple booster

circuit utilizing the PAM2401 IC, and includes protection diodes so you can

run multiple cells in series for an extra kick. While the booster circuit is in

operation, this board can draw more current the lower the input voltage,

making it perfect to deliver a strong charge in a small amount of time.

The circuit is constructed by feeding an MCP73831 charge controller IC to

the LiPo port, and to the input of a PAM2401 boost controller. Multiple

connection types are provided for the battery, charge source and switch to

allow flexibility of application, and two LEDs provide feedback on system

status. If you need more than 5V out of your project, the SparkFun LiPo

Charger/Boosters can also be daisy-chained together to get a bigger bang

for your buck.

uses a different IC. Also, this board does not possess any undervoltage or

other battery protection features, so we do recommend that you use it only

with batteries with a built-in protection circuit.

Features



Charger, microUSB, 500mA



Booster, 5V, 1A output



Form factor for our 1,000mAh batteries



Battery isolation switch with optional external connections



Enable pin broken out



Disabled current less than 10uA



LED indicators for power and charge



Super-clean output signal (high-frequency switching)