公开(公告)号：US11356020B2

公开(公告)日：2022-06-07

申请号：US16546869

申请日：2019-08-21

Applicant: Texas Instruments Incorporated

Inventor： Zhangyi Xie ,  Zhenglin Pu ,  Yu Wang

IPC: H02M3/158 ,  H02M1/00

Abstract: A circuit comprising a frequency to voltage converter having an input configured to receive a signal and an output coupled to a first node and another frequency to voltage converter having an input configured to receive a reference clock and an output coupled to a second node. The circuit also comprises a voltage source coupled between the first node and a third node, a voltage source coupled between the second node and a fourth node, a switch coupled between the first node and the third node, and a switch coupled between the second and fourth nodes. The circuit further comprises a comparator having an input coupled to the second node, another input coupled to the third node, and an output, a logic circuit having an input coupled to the comparator output and an output, and a counter having an input coupled to the logic circuit output and an output.

公开(公告)号：US10432092B2

公开(公告)日：2019-10-01

申请号：US16032718

申请日：2018-07-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Zhangyi Xie ,  Zhenglin Pu ,  Yu Wang

IPC: H02M3/158 ,  H02M1/00

Abstract: A controller is configured to perform self-calibration to maintain approximately a desired switching frequency of a power converter. The self-calibration performed by the controller at least partially mitigates detrimental effects associated with variation in an actual switching frequency of the power converter from a designed switching frequency. The controller maintains approximately the desired switching frequency, in one example, in view of a delay inherent in the control by the controller of the power converter.