公开(公告)号：US20190058385A1

公开(公告)日：2019-02-21

申请号：US15858640

申请日：2017-12-29

Applicant: Texas Instruments Incorporated

Inventor： Orlando Lazaro ,  Kevin Scoones ,  Alvaro Aguilar ,  Jeffrey Anthony Morroni ,  Sombuddha Chakraborty

IPC: H02M1/08 ,  H02M3/158 ,  H03K7/08 ,  H02M1/14

Abstract: In described examples of methods and control circuitry to control a multi-level power conversion system, the control circuitry generates PWM signals having a duty cycle to control an output signal. The duty cycle is adjustable in different switching cycles. States of the system's switches are adjustable in one or more intervals within the switching cycles. In response to a voltage across a capacitor of the system being outside a non-zero voltage range, the control circuitry adjusts states of the switches in two intervals to discharge or charge the capacitor in a given switching cycle.