Invention Grant
US08854018B2 Control circuit for reducing touch current of a power converter and operation method thereof
有权
用于降低功率转换器的触摸电流的控制电路及其操作方法
- Patent Title: Control circuit for reducing touch current of a power converter and operation method thereof
- Patent Title (中): 用于降低功率转换器的触摸电流的控制电路及其操作方法
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Application No.: US13789651Application Date: 2013-03-07
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Publication No.: US08854018B2Publication Date: 2014-10-07
- Inventor: Kuo-Chien Huang , Chen-Lun Yang , Hsin-Hung Lu
- Applicant: Leadtrend Technology Corp.
- Applicant Address: TW Science-Based Industrial Park, Hsin-Chu
- Assignee: Leadtrend Technology Corp.
- Current Assignee: Leadtrend Technology Corp.
- Current Assignee Address: TW Science-Based Industrial Park, Hsin-Chu
- Agent Winston Hsu; Scott Margo
- Main IPC: G05F5/00
- IPC: G05F5/00 ; H02M1/42 ; H02M3/24 ; H02M1/00
Abstract:
A control circuit for reducing touch current of a power converter includes an auxiliary pin, a zero-crossing signal generator, a feedback pin, a frequency limiting signal generator, and a gate signal generator. The auxiliary pin receives a voltage corresponding to an auxiliary winding of the power converter. The zero-crossing signal generator generates a zero-crossing signal according to the voltage and a first reference voltage. The feedback pin receives a feedback voltage corresponding to an output voltage of the power converter. The frequency limiting signal generator generates a frequency limiting signal according to the feedback voltage and a second reference voltage. The frequency limiting signal limits the gate control signal to a predetermined frequency. The gate signal generator generates a gate control signal to a power switch of the power converter according to the frequency limiting signal and the zero-crossing signal.
Public/Granted literature
- US20130250620A1 CONTROL CIRCUIT FOR REDUCING TOUCH CURRENT OF A POWER CONVERTER AND OPERATION METHOD THEREOF Public/Granted day:2013-09-26
Information query
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