公开(公告)号：US20240072675A1

公开(公告)日：2024-02-29

申请号：US17898916

申请日：2022-08-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jose V. FORMENTI ,  Robert MARTINEZ ,  Michael CORRY ,  Sombuddha CHAKRABORTY

IPC: H02M3/335 ,  H02M1/00 ,  H02M3/00

CPC classification number: H02M3/33576 ,  H02M1/0035 ,  H02M3/01

Abstract: A system includes a control circuit having a voltage input and a control circuit output. The control circuit produces a control voltage at the control circuit output having a magnitude inversely related to a magnitude of an input voltage at the input voltage input. A VCO has a VCO control input and a VCO clock output. The VCO control input is coupled to the control circuit output. The VCO produces a VCO clock on the VCO clock output having a frequency that is a function of the control voltage. A protection circuit has a first clock input, a second clock input, and a protection circuit output. The second clock input is coupled to the VCO clock output. The protection circuit generates a protection circuit output signal at the protection circuit output based on a difference in frequency between a clock signal at the first clock input and the VCO clock.