公开(公告)号：US11463005B2

公开(公告)日：2022-10-04

申请号：US16859467

申请日：2020-04-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Huijuan Li ,  Ronnie Antone Bean ,  Benjamin McCue ,  Ryan Erik Lind

IPC: H02M3/158 ,  H02M1/00

Abstract: In some examples, a converter circuit can be configured to operate in a buck-boost mode. The converter circuit can include a ramp generator that can be configured to generate first and second ramp signals that at least partially overlap respective portions of a buck-boost region during each intermediate clock cycle between clock cycles of a clock signal. By generating the first and second ramp signals during each intermediate clock cycle, first and second drivers can be provided to toggle switches of a power stage, such that an output voltage provided by the power stage can be averaged out over clock cycles of the clock signal to allow for a gradual transition between buck and boost modes of operation of the converter circuit. In some examples, the converter circuit can be configured to operate in a test mode and can be configured to implement trimming of a ramp signal.