Patent ID: 8427008
Filing Date: 2013-04-23
Classification: H02M,H05B

Abstract:
1. An electronic power supply circuit, comprising: a step-up converter structured to receive an input voltage and to convert the input voltage into first and second output voltages to power first and second circuit branches, respectively; a timer circuit coupled to the step-up converter and configured to generate timer signals configured to control the converter to alternately generate the first output voltage to power the first circuit branch and the second output voltage to power the second circuit branch; a regulation circuit configured to regulate overvoltages across an output capacitor during commutations between the first and second output voltages, the regulation circuit including: a commutation circuit configured to activate, in accordance with the timer signals from the timer circuit, the step-up converter, the commutation circuit including: a second comparator configured to compare the second gate signal with the input voltage and to provide a second activation signal to the step-up converter in response to the second gate signal reaching the input voltage.