发明授权
US08199532B2 Isolated voltage converter with feedback on the primary winding, and corresponding method for controlling the output voltage
有权
具有初级绕组反馈的隔离式电压转换器,以及控制输出电压的相应方法
- 专利标题: Isolated voltage converter with feedback on the primary winding, and corresponding method for controlling the output voltage
- 专利标题(中): 具有初级绕组反馈的隔离式电压转换器,以及控制输出电压的相应方法
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申请号: US12324194申请日: 2008-11-26
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公开(公告)号: US08199532B2公开(公告)日: 2012-06-12
- 发明人: Michele Grande , Salvatore Tumminaro , Claudio Adragna
- 申请人: Michele Grande , Salvatore Tumminaro , Claudio Adragna
- 申请人地址: IT Agrate Brianza
- 专利权人: STMicroelectronics S.r.l.
- 当前专利权人: STMicroelectronics S.r.l.
- 当前专利权人地址: IT Agrate Brianza
- 代理机构: Graybeal Jackson LLP
- 优先权: ITTO2007A0859 20071129
- 主分类号: H02M3/335
- IPC分类号: H02M3/335 ; H02M5/42 ; H02M7/68 ; H02M3/24 ; H02M7/44
摘要:
An embodiment of a voltage converter, designed to convert an input voltage into a regulated output voltage, having: a voltage transformer having a primary winding receiving the input voltage, a secondary winding supplying the output voltage (Vout), and an auxiliary winding supplying a feedback signal correlated to the output voltage; a control switch, connected to the primary winding; and a control circuit, connected to a control terminal of the control switch for controlling switching thereof as a function of the feedback signal. The control circuit is provided with a sampling stage that samples the feedback signal and supplies a sampled signal. An averager stage is connected to the output of the sampling stage and implements a low-pass filtering of the sampled signal so as to reduce undesirable oscillations due to sampling.