Hi,

I am working on a hand held device that will have a polymer Li-Ion battery inside (2000-3000mAh). I want to charge my device via micro USB. For this device I need a battery manager/charger.

Here are my requirements:
- Must be controllable to: enable/disable charging, draw 100mA and draw 500mA from the USB
- Low cost
- Must completely handle single cell Li-Ion battery charging
- Charging method: constant current + constant voltage
- Must have battery thermistor input
- Must have charger status output

I have found two IC's that I think I can use: MAX8601 and LTC4095. I don't know which of them to choose and would like some advice. Other alternatives are also appreciated.

 

Microchip has lots and also tutorials/aplication notes. Start here. If you read through the datasheets, tutorials and apnotes you should be able to get up to speed easily.

 

MCP73871 is an affordable IC that satisfies my requirements. It seems like it can be configured in many ways too.

 

Have a look at this charger http://www.candlepowerforums.com/vb...ment-on-Charger-module-with-TP4056-controller

Under $3.00 on ebay. Hope this helps..........