Jim Wilson is an electronics engineer with Allied Healthcare Products Inc., St. Louis, Mo. He holds a BS in physics from Washington University, St. Louis, and an MS in physics from SIUE, Edwardsville,Ill. Email address: wilsonj@alliedhpi.com
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June 25, 2009[Ideas For Design] Seamless Power Switcher And Battery Charger Solution Targets Portable Devices
In today’s world, there are many applications for portable devices. These devices must have extremely low or no battery drain when turned off and need to charge their on-board batteries when connected to an external power supply, whether the device is turned on or not. This circuit provides seamless switching from batteries to external power and provides a simple charging solution. In addition, there are several output signals for a microcontroller (MCU). This...
