Battery Charging Circuit for USB

Published:2011/8/3 7:08:00 Author:Michel | Keyword: USB, Battery Charging Circuit | From:SeekIC

The above picture is battery charging circuit for USB.It is lithium charging circuit with universal serial bus (USB) and the maximum current when it is maximum rating power,5.25V/500mA. In the circuit, LM3622 lithium ion batteries are the controllers.The designing recharging circuit makes USB have the largest power. In normal work situation,the current which is aborbed by the work ability to largest power can not be higher than 5OOmA to satisfy the USB technology index.The biggest charge current is set for 400 mA via limiting resistance R1.And the 100 mA current is provided to charger control circuit etc.During the system starts, LM3525 power switch makes a battery charger and bus remain isolated state.The charging current does not exceed the maximum current provided by the bus.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/Battery_Charging_Circuit_for_USB.html

Print this Page | Comments | Reading(3)