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公开(公告)号：US11699956B2
公开(公告)日：2023-07-11
申请号：US17989877
申请日：2022-11-18
Applicant: STMicroelectronics S.r.I.
Inventor： Claudio Adragna , Francesco Ferrazza
CPC classification number: H02M3/33569 , H02M1/08
Abstract: In an embodiment, a method for operating an ACF converter includes: turning on a low-side transistor that is coupled between a primary winding of a transformer and a reference terminal to cause a forward current to enter the primary winding, turning off the low-side transistor; after turning off the low-side transistor, turning on a high-side transistor that is coupled between the primary winding and a clamp capacitor to cause a reverse current to flow through the primary winding; and after turning on the high-side transistor, when an overcurrent of the reverse current is not detected, keeping the high-side transistor on for a first period of time, and turning off the high-side transistor after the first period of time, and when the overcurrent of the reverse current is detected, turning off the high-side transistor without keeping the high-side transistor on for the first period of time.
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公开(公告)号：US20230141001A1
公开(公告)日：2023-05-11
申请号：US17989877
申请日：2022-11-18
Applicant: STMicroelectronics S.r.I.
Inventor： Claudio Adragna , Francesco Ferrazza
CPC classification number: H02M3/33569 , H02M1/08
Abstract: In an embodiment, a method for operating an ACF converter includes: turning on a low-side transistor that is coupled between a primary winding of a transformer and a reference terminal to cause a forward current to enter the primary winding, turning off the low-side transistor; after turning off the low-side transistor, turning on a high-side transistor that is coupled between the primary winding and a clamp capacitor to cause a reverse current to flow through the primary winding; and after turning on the high-side transistor, when an overcurrent of the reverse current is not detected, keeping the high-side transistor on for a first period of time, and turning off the high-side transistor after the first period of time, and when the overcurrent of the reverse current is detected, turning off the high-side transistor without keeping the high-side transistor on for the first period of time.
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