发明名称 |
SWITCH CONTROL CIRCUIT, POWER SUPPLY DEVICE COMPRISING THE SAME AND DRIVING METHOD OF THE POWER SUPPLY DEVICE |
摘要 |
The invention relates to a switch control circuit, a power supply including the same, and a method for driving the power supply. The power supply includes: a first switch; a second switch coupled in series to the first switch; a transistor coupled to a node where the first switch and the second switch are coupled; a resonance capacitor coupled between the transformer and a primary side ground and to which a resonance current flows; a sense circuit generating a first sense voltage that depends on the resonance current when the resonance current is a positive current; and a switch control circuit detecting a zero voltage switching failure by sensing the resonance current using the first sense voltage at a turn-off time of the first switch for every switching cycle of the first and second switches. |
申请公布号 |
US2014286056(A1) |
申请公布日期 |
2014.09.25 |
申请号 |
US201414222487 |
申请日期 |
2014.03.21 |
申请人 |
FAIRCHILD KOREA SEMICONDUCTOR LTD. |
发明人 |
YOON Jaehan;AHN Byunghak |
分类号 |
H02M3/335 |
主分类号 |
H02M3/335 |
代理机构 |
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代理人 |
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主权项 |
1. A power supply comprising:
a first switch; a second switch coupled in series to the first switch; a transformer coupled to a node where the first switch and the second switch are coupled; a resonance capacitor coupled between the transformer and a primary side ground and to which a resonance current flows; a sense circuit configured to generate a first sense voltage that depends on the resonance current when the resonance current is a positive current; and a switch control circuit configured to detect a zero voltage switching failure by sensing the resonance current using the first sense voltage at a turn-off time of the first switch for every switching cycle of the first and second switches. |
地址 |
Bucheon-si KR |