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公开(公告)号：US11996777B2
公开(公告)日：2024-05-28
申请号：US17590751
申请日：2022-02-01
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Fabio Cacciotto
CPC classification number: H02M3/33515 , H02M1/08
Abstract: A control circuit for an electronic converter is generates a drive signal of the electronic converter by setting the drive signal to a first logic level in response to a switch-on signal, and to a second logic level in response to a switch-off signal. The control circuit comprises a valley detection circuit and a combinational logic circuit. The control circuit comprises a blanking circuit configured to generate the blanking signal by determining a blanking time, and asserting the blanking signal when the blanking time elapses since the start of the switch-on or the switch-off interval. The control circuit comprises a blanking time adaption circuit to adapt the blanking time as a function of a blanking time adaption signal based on the input voltage, and to increase the blanking time when the input voltage increases, and decrease the blanking time when the input voltage decreases.
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公开(公告)号：US11881784B2
公开(公告)日：2024-01-23
申请号：US17935542
申请日：2022-09-26
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Fabio Cacciotto
CPC classification number: H02M3/33515 , H02M1/08 , H02M3/33523 , H02M1/0009
Abstract: A control circuit for a driving an electronic switch associated with a switching node of a flyback converter includes a comparison circuit configured to generate a switch-off signal by comparing a current measurement signal with a current measurement threshold signal. A valley detection circuit is configured to generate a trigger in a trigger signal when a valley signal indicates a valley in a voltage at the switching node of the flyback converter, and a blanking circuit is configured to generate a switch-on signal by combining the trigger signal with a timer signal provide by a timer circuit. The timer signal indicates whether a blanking time-interval has elapsed.
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公开(公告)号：US11482935B2
公开(公告)日：2022-10-25
申请号：US17174001
申请日：2021-02-11
Applicant: STMicroelectronics S.r.l.
Inventor： Fabio Cacciotto
Abstract: A control circuit for a driving an electronic switch associated with a switching node of a flyback converter includes a comparison circuit configured to generate a switch-off signal by comparing a current measurement signal with a current measurement threshold signal. A valley detection circuit is configured to generate a trigger in a trigger signal when a valley signal indicates a valley in a voltage at the switching node of the flyback converter, and a blanking circuit is configured to generate a switch-on signal by combining the trigger signal with a timer signal provide by a timer circuit. The timer signal indicates whether a blanking time-interval has elapsed.
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