Tiny USB Li-Po battery charger
This is a tiny, easy to make USB Lithium-Polymer battery charger. It’s based on the MAX1555 charger IC.
In The Forum
- Bus Pirate Support • Be still suffering tuofdezeki
- Tools of the trade • Re: Making Chassis Overlays with a Cameo timb
- Tools of the trade • Re: Cutting mylar stencils with a silohuette cameo timb
- Project development, ideas, and suggestions • Control ft232h remotely vagabond
- General discussion • Re: Square Inch PCB from Electronic Interconnect. brian
- Project development, ideas, and suggestions • FPGA Board : Indirect SPI not working shanjitsingh
Comments
No “Read more…” or link-to-forum….?
The sample circuit is available in MAX1555 datasheet linked in post
I was under the impression a proper USB charger needs to communicate with the USB host to ensure it will supply the full 500mA available from a USB 2.0 port. This MAX1555 part seem incapable of doing this – and off hand I don’t know of another that can.
The MAX1555 charges with just 100mA when USB-powered. When it is used with an external supply (which cannot be done with the circuit linked above) it charges with 280mA.
Sweet, my post ;)
I’ll have one wit ha Microchip up in one or two weeks I hope.
Real PCB’s on the way for that thought. Max1555 is too expensive and hard to get.