Intersil Americas Inc.

Rami Abou-Hamze

Weihong Qiu

Ben A Dowlat

Steven Patrick Laur

Robert H Isham

Zhixiang Liang

A circuit comprises a first input for receiving a supply voltage and a second input for receiving a sensed current signal from an output of a DC to DC converter. The circuit also includes an output voltage for providing an adjustable drive voltage to a drive circuit. The circuit additionally includes circuitry for adjusting the drive voltage responsive to supply voltage and the sensed current signal.

DC/DC converter with adaptive drive voltage supply

Gate driver topology for maximum load efficiency

A dual-edge modulation controller including first and second ramp circuits, first and second comparators, an error amplifier and pulse control logic. The first ramp circuit provides a leading-edge ramp synchronous with a clock. The error amplifier compares a feedback signal with a reference and provides a compensation signal. The first comparator compares the leading-edge ramp with the compensation signal and asserts a set signal. The second ramp circuit provides a trailing-edge ramp that begins ramping when the set signal is asserted. The second comparator compares the trailing-edge ramp with the compensation signal and asserts a reset signal. The pulse control logic asserts a PWM signal when the set signal is asserted and de-asserts the PWM signal when the reset signal is asserted. The controller may control multiple phases with current balancing. The slew rate of the ramps may be adjusted based on the number of PWM signal asserted.

PWM controller with dual-edge modulation using dual ramps

Growing community of inventors

Los Gatos, CA, United States of America

Rami Abou-Hamze