发明名称 |
Quick-reset circuit for auxiliary power supply |
摘要 |
Run/standby switching including switching to standby upon excessive current loading are provided in a switched mode power supply useful as an auxiliary power supply in a television. A switching controller IC is coupled between a primary transformer winding on the rectified raw B+ input voltage and ground. A switching transistor is coupled to the control input of the controller and is biased by the raw B+ input voltage for pulling down the control input. A run/standby control circuit and an overcurrent protective circuit disable the switching transistor during run mode operation and enable the switching transistor upon an overcurrent fault. The switched-mode power supply is further provided with a quick-reset capability to enable the power supply to consistently provide output voltages which are within nominal output voltage levels despite rapidly repeated dislocations in the operational mode of the apparatus.
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申请公布号 |
US5956240(A) |
申请公布日期 |
1999.09.21 |
申请号 |
US19960749714 |
申请日期 |
1996.11.15 |
申请人 |
THOMSON CONSUMER ELECTRONICS, INC. |
发明人 |
WILLIAMS, KEVIN MICHAEL |
分类号 |
H02H7/12;H02M1/00;H02M3/28;H02M3/335;H04N5/63;(IPC1-7):H02M3/335 |
主分类号 |
H02H7/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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