Patent ID: 7960956
Filing Date: 2011-06-14
Classification: H02M

Abstract:
1. A controller for DC-DC converters of the type associated with a half-bridge driving stage of at least one inductive load, with a pair of power MOS transistors in Highside and Lowside configuration being driven by a corresponding converter, the controller including an input for connection to a terminal of the inductive load, the controller comprising: a read block for reading an inductive load phase current at the terminal; an over current comparator having a first input coupled to an output of the read block; a bypass compensation network including an error amplifier block having a first input coupled to the terminal through a voltage divider, and a second input coupled to a reference potential; and a bypass impedance having a first terminal coupled to the voltage divider and a second terminal coupled to the first input of the over current comparator, so as to bypass the error amplifier in coupling the voltage at the terminal, after division, to the over current comparator, wherein an output of the error amplifier block is coupled to a second input of the over current comparator, and an output of the over current comparator is supplied to the DC-DC converter.