发明名称 |
Semiconductor device for controlling switching power supply |
摘要 |
A semiconductor device controls a switching power supply. The semiconductor device includes a current inflow terminal; a starter circuit to cause a starting current to flow from the current inflow terminal to a power supply terminal to charge a capacitor externally connected to the power supply terminal; a control unit which controls the starter circuit to turn on to charge the capacitor with the starting current and controls the starter circuit to turn off to perform brown-out detection; a comparator which detects a brown-out state while the starter circuit is turned off; and a brown-out detection unit which receives output signals from the comparator and the control unit as inputs. The brown-out detection is performed while the starter circuit is off, so that the current inflow terminal for the starter circuit is used in common as a voltage detection terminal for detection of the brown-out state. |
申请公布号 |
US8084893(B2) |
申请公布日期 |
2011.12.27 |
申请号 |
US20090385527 |
申请日期 |
2009.04.10 |
申请人 |
FUJII MASANARI;FUJI ELECTRIC SYSTEMS CO., LTD. |
发明人 |
FUJII MASANARI |
分类号 |
H01H35/00 |
主分类号 |
H01H35/00 |
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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