发明名称 |
Direct-current power-supply apparatus, control circuit thereof and semiconductor integrated circuit device for power supply |
摘要 |
A direct-current power-supply apparatus provided by the present invention comprises a switching converter for converting an input direct-current power into another direct-current power, a control circuit and an isolation means. The switching converter has a main switch device for generating a pulse voltage from the direct-current input, a synchronous-rectification circuit on the output side of the switching converter and a reverse-current-blocking switch. On the other hand, the control circuit includes a PWM formation unit for driving the main switch device, a synchronous-rectification control unit for controlling an operation to drive the synchronous-rectification circuit and a driving control unit for controlling an operation to drive the reverse-current-blocking switch. The control circuit operates by using a common electric potential appearing on the output side of the switching converter as a reference electric potential. A driving signal is applied to the main switch device through the isolation means. Thus, the direct-current power-supply apparatus is controlled without need for exchanges of the signal for driving the main switch device and a signal isolated between control devices including a switch for synchronous rectification.
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申请公布号 |
US6496395(B2) |
申请公布日期 |
2002.12.17 |
申请号 |
US20010809997 |
申请日期 |
2001.03.14 |
申请人 |
HITACHI LTD.;HITACHI TOHBU SEMICONDUCTOR LTD. |
发明人 |
TOKUNAGA NORIKAZU;ONDA KENICHI;TAKAHASHI TADASHI;ONAKA TAKESHI;SAGA RYOHEI;HAYASHI KATSUNORI |
分类号 |
H02M3/28;H02M3/335;(IPC1-7):H02M3/24 |
主分类号 |
H02M3/28 |
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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