LiPo/LiFe/PB battery charger based on LTC4162

Uses LTC4162 to make a multi-cell battery charger that communicates over I2C port with a microcontroller.

kaustubh

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Description

The project uses Analog Device's LTC4162-F to charge my LIFePO4 batteries. There are pin compatible IC versions for LiPo and Lead Acid batteries, hence, this project can easily be used for these battery types without changing the circuit. The primary use case of this project is in base/docking station charger I am building for my robot.

Details

The LTC4162 ICs are attractive as they provide the following benefits:

Wide Charging Input Voltage Range: 4.5V to 35V
High Efficiency Synchronous Operation>16-Bit Digital Telemetry System Monitors VBAT, IBAT, RBAT, TBAT, TDIE, VIN, IIN, VOUT
Charges multiple cell batteries
Input Undervoltage Charge Current Limit Loop>Input MPPT for Solar Panel Inputs
Input Current Limit Prioritizes System Load Output>Low Loss PowerPath™
Instant-On Operation with Discharged or Missing Battery
JEITA Temperature Controlled Charging

Source [ https://www.analog.com/en/products/ltc4162-f.html.html#product-overview ]

I am currently sourcing parts from Mouser and building the sample circuit in KiCad