Adaptive low-power zero-cross comparator for discontinuous current mode operated switching mode power supply

US9343968B2 · kind B2 · utility

Assignee

• DIALOG SEMICONDUCTOR INC. · DE

Inventors

• Jindrich Svorc · Swindon, GB
• Martin Faerber · Munich, DE

Key dates

• Filing date: May 16, 2013
• Grant date: May 17, 2016
• Expiry date: Jul 11, 2033

Classification

• Technology area (CPC —): General

Abstract

A time off estimator and an adaptive controller implemented on an integrated circuit to emulate current dependent zero crossing circuitry to permit improved performance of a buck type switching mode power supply. The time off estimator circuit is enhanced by an automatic correction circuit for the timing of a zero crossing where energy to a reference capacitor returns to zero and is turned off awaiting the next cycle where the capacitor is again charged and discharged.