Invention Grant
US09318950B2 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.: US14337251Application Date: 2014-07-22
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Publication No.: US09318950B2Publication Date: 2016-04-19
- Inventor: Hsin-Hung Lu , Chen-Lun Yang
- 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
- Priority: TW102126346A 20130723
- Main IPC: H02M1/42
- IPC: H02M1/42
Abstract:
A control circuit for reducing touch current of a power converter includes an auxiliary pin, a zero-crossing signal generator, a frequency limiting signal generator, and a gate signal generator. The auxiliary pin is used for receiving a voltage generated by an auxiliary winding of the power converter. The zero-crossing signal generator is used for generating a zero-crossing signal according to the voltage generated by the auxiliary winding and a first reference voltage. The frequency limiting signal generator is used for generating a frequency limiting signal according to a gate control signal, a burst mode signal, and the voltage generated by the auxiliary winding. The frequency limiting signal is used for limiting the gate control signal to a predetermined frequency. The gate signal generator is used for generating the 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
- US20150028821A1 CONTROL CIRCUIT FOR REDUCING TOUCH CURRENT OF A POWER CONVERTER AND OPERATION METHOD THEREOF Public/Granted day:2015-01-29
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