| 发明名称 |
POWER SUPPLY DEVICE |
| 摘要 |
A power supply device includes: a switching element that performs synchronous rectification on a power to be induced in a first secondary wiring of a transformer that performs voltage conversion; a first current detection circuit that detects a value of a current to be induced in a second secondary wiring of the transformer; a second current detection circuit that detects a change in the current to be induced in the second secondary wiring, the second current detection circuit having a higher response speed with respect to conversion of the current than that of the first current detection circuit; and a control unit (control circuit) that determines based on the change in the current detected by the second current detection circuit whether or not backflow is occurring, and controls the switching element in accordance with a result of the determination. |
| 申请公布号 |
US2016241151(A1) |
申请公布日期 |
2016.08.18 |
| 申请号 |
US201315027556 |
申请日期 |
2013.11.29 |
| 申请人 |
SHINDENGEN ELECTRIC MANUFACTURING CO., LTD. |
发明人 |
WAKABAYASHI Koji;NITTA Konosuke |
| 分类号 |
H02M3/335;H02M1/088 |
主分类号 |
H02M3/335 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A power supply device comprising:
a switching element configured to perform synchronous rectification on a power to be induced in a first secondary wiring of a transformer configured to perform voltage conversion; a first current detection circuit configured to detect a value of a current to be induced in a second secondary wiring of the transformer; a second current detection circuit configured to detect a change in the current to be induced in the second secondary wiring, the second current detection circuit having a higher response speed with respect to conversion of the current than that of the first current detection circuit; and a control unit configured to
determine based on the change in the current detected by the second current detection circuit whether or not backflow is occurring, andcontrol the switching element in accordance with a result of the determination, wherein the second current detection circuit is configured to detect a minimum value of values of the current, and the control unit is configured to, in a case that the minimum value is detected by the second current detection circuit, determine that backflow is occurring. |
| 地址 |
Tokyo JP |
