Architecture for switching between an external and internal power source

摘要

The present invention comprises a combination of a new circuit topology utilizing microcontroller ( 202, 302 ) and a modified logic control circuit which enables the replacement of a Schottky diode, commonly used in series with AC adapter, by a MOS transistor switch ( 212, 312 ) to implement airline mode operation of a system, with the added benefits of more efficient power dissipation and minimization of sparking or arcing at the power input terminal.