Patent ID: 6414470
Filing Date: 2002-07-02
Classification: H02J,H02M

Abstract:
An apparatus for current balance in a multi-phase DC-to-DC converter having a converter output for providing an output voltage and a plurality of channels each configured for generating a channel current, said apparatus comprising:a voltage sense circuit for sensing said output voltage and generating a voltage sense signal; a plurality of current sense circuits each corresponding to one of said plurality of channels for sensing said channel current and generating a current sense signal for said corresponding channel; a comparator for receiving said voltage sense signal and a reference signal and generating an error signal; and a plurality of multi-input pulse width modulators each for generating a PWM signal for regulating said channel current of said corresponding channel by a first input pair comparing said error signal with a ramp signal and one or more second input pair each comparing said current sense signal of said corresponding channel with each other of said plurality of current sense signals.