Description
This Lithium Ion and Lithium Polymer Battery Charger is based on the MCP73833 chip, designed for charging single 3.7V/4.2V Li-ion or LiPo batteries via a USB mini-B connection. It provides an efficient three-stage charging process: a preconditioning charge, followed by a constant-current fast charge, and finishing with a constant-voltage trickle charge to keep your battery topped-up.
Key Features:
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Adjustable Fast-Charge Current:
- The default fast-charge current is 500mA, but it can be easily adjusted from 100mA to 1000mA by soldering a through-hole resistor on-board.
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Three LED Indicators:
- Power LED: Lights up when the charger is powered.
- Charging LED: Indicates when charging is in progress.
- Complete LED: Shows when charging is finished.
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Separate JST Connectors:
- Keep the battery connected while passing power through the additional JST connector without removing the battery.
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Thermistor Support:
- The chip supports a 10K NTC thermistor (included as a plain 10K resistor), which can be replaced with the thermistor for temperature monitoring when using high charge rates.
Specifications:
- Input: 5V via mini-B USB connector.
- For Charging: Single 3.7V/4.2V Lithium Ion/Lithium Polymer Batteries (not for older 3.6V/4.1V cells).
- Adjustable Current: 500mA (default), adjustable from 100mA to 1000mA.
- Breakouts: 0.1″ (2.54mm) for battery, DC input, and status LEDs.
What’s Included:
- Assembled and Tested Charger Board.
- Free 2-Pin JST Cable.
- Batteries and USB Cable not Included.
Perfect for your DIY electronics projects, this charger is designed for safe and efficient battery charging with easy-to-use functionality.
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