公开(公告)号：US20170237345A1

公开(公告)日：2017-08-17

申请号：US15585399

申请日：2017-05-03

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Gregory MANLOVE ,  James MCKENZIE ,  Robert CHIACCHIA ,  Yi Ding GU ,  Jian LI

IPC: H02M3/156 ,  H02M1/32 ,  H02M3/158 ,  G05F1/56 ,  H02M3/142 ,  G05F1/10

CPC classification number: G05F1/10 ,  G05F1/562 ,  H02M1/32 ,  H02M3/142 ,  H02M3/156 ,  H02M3/158 ,  H02M2001/0019 ,  H02M2001/0025

Abstract: A current mode switching regulator circuit and operating method includes a variable duty cycle power switch controller, a voltage feedback loop that provides a feedback signal based on the output voltage, a current feedback loop that provides a current sense signal based on the output current, and an offset circuit having an external signal input and coupled to the current feedback loop. The power switch controller controls the switching regulator circuit to generate an output voltage and an output current. The offset circuit is configured to provide an offset output control signal, independently of the voltage feedback loop, to control the power switch controller so as to vary a duty cycle of the power switch controller based on the current sense signal and an external offset signal applied to the external signal input.