发明申请
- 专利标题: ZERO STANDBY SWITCHING POWER SUPPLY SOLUTION
- 专利标题(中): 零待机切换电源解决方案
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申请号: US13436779申请日: 2012-03-30
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公开(公告)号: US20130088898A1公开(公告)日: 2013-04-11
- 发明人: XIAORU GAO , YAJIANG ZHU , CHAO CHEN , MEILING ZHANG
- 申请人: XIAORU GAO , YAJIANG ZHU , CHAO CHEN , MEILING ZHANG
- 申请人地址: KY George Town
- 专利权人: BCD Semiconductor Manufacturing Limited
- 当前专利权人: BCD Semiconductor Manufacturing Limited
- 当前专利权人地址: KY George Town
- 优先权: CN201110251226.5 20110829
- 主分类号: H02M3/335
- IPC分类号: H02M3/335
摘要:
A switching mode power supply (SMPS) includes a power transistor coupled to the primary winding of transformer and a resistor coupled between the input power source and a control terminal of the power transistor for triggering a primary current flow through the power transistor for providing startup power. A primary side control circuit is configured to regulate the output of the SMPS. A secondary side control circuit is coupled to the secondary winding and being configured to provide a first electrical signal to the secondary winding when an output voltage of the SMPS is less than a first reference voltage, whereupon an awakening signal is induced in the auxiliary winding and causes the primary side control circuit to provide a turn-on signal to the power transistor. The primary side control circuit is configured to enter a standby mode or a normal operating mode in response to the awakening signal.
公开/授权文献
- US08804380B2 Zero standby switching power supply solution 公开/授权日:2014-08-12
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