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公开(公告)号：US11245336B2
公开(公告)日：2022-02-08
申请号：US16893325
申请日：2020-06-04
Applicant: Infinno Technology Corp.
Inventor： Yuan-Kai Cheng , Chun-Chiang Chen
Abstract: An over-current protection module for a flyback power supply having a transformer includes: a switch control unit, configured to generate a control signal in a first period to control a transistor switch coupled to a primary side of the transformer, wherein the transistor switch is turned on in a first duty cycle of the control signal and the transistor switch is turned off in a second duty cycle of the control signal; a transformation unit, configured to generate a compensation current according to the second duty cycle; a timing control unit, configured to output the compensation current to an impedance unit to generate an impedance cross voltage in a shut-off period of the transistor switch of the first period; and a current control unit, configured to determine an over-current reference voltage according to the impedance cross voltage for the over-current protection module in a second period following the first period.
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公开(公告)号：US20210021197A1
公开(公告)日：2021-01-21
申请号：US16893325
申请日：2020-06-04
Applicant: Infinno Technology Corp.
Inventor： Yuan-Kai Cheng , Chun-Chiang Chen
Abstract: An over-current protection module for a flyback power supply having a transformer includes: a switch control unit, configured to generate a control signal in a first period to control a transistor switch coupled to a primary side of the transformer, wherein the transistor switch is turned on in a first duty cycle of the control signal and the transistor switch is turned off in a second duty cycle of the control signal; a transformation unit, configured to generate a compensation current according to the second duty cycle; a timing control unit, configured to output the compensation current to an impedance unit to generate an impedance cross voltage in a shut-off period of the transistor switch of the first period; and a current control unit, configured to determine an over-current reference voltage according to the impedance cross voltage for the over-current protection module in a second period following the first period.
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公开(公告)号：US20170310226A1
公开(公告)日：2017-10-26
申请号：US15491983
申请日：2017-04-20
Applicant: Infinno Technology Corp.
Inventor： Yuan-Kai Cheng
CPC classification number: H02M1/36 , H02M1/34 , H02M3/33523 , H02M2001/0006 , H02M2001/344
Abstract: A control module for a flyback power converting device is coupled between a primary side winding of the flyback power converting device and a power end and includes a switch unit coupled to the primary side winding; wherein the control module conducts a connection between the primary side winding and the power end when the switch unit is disconnected; wherein the power end is able to provide an operation current to the control module.
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