Patent ID: 8169198
Filing Date: 2012-05-01
Classification: H02M

Abstract:
1. An anti-ring asynchronous boost converter having a power input to receive an input voltage, comprising: an inductor connected between the power input and a phase node; a power switch serially connected to the inductor by the phase node and controlled by a PWM signal; a diode connected between the phase node and a power output of the converter; and a charge bypass circuit shunt to the inductor; wherein the charge bypass circuit establishes a bypass path therethrough in response to a detection signal if a phase node voltage ringing is detected, the charge bypass circuit comprises: wherein one of the two transistors is a high voltage transistor and connected between the first transistor and the phase node, whereby bypass current flows from the phase node to the power input through the high voltage transistor when the phase node voltage is higher than the input voltage.