发明名称 |
LIGHTING POWER SUPPLY DEVICE |
摘要 |
A lighting power supply device includes a control circuit controlling a transistor that controls a drive current flown through a lamp, receiving a pulsating flow converted from an alternating current by a rectifying circuit rectifying the alternating current subjected to phase control by a phase-controlled dimmer, and generating/outputting direct current voltage/current supplied to the lamp. The control circuit includes a time-voltage conversion circuit converting a time decided according to a phase of a voltage corresponding to the pulsating flow into a voltage; and a terminal to which a capacitor with an arbitrary capacitance value is connectable. The time-voltage conversion circuit allows the capacitor to generate a charging voltage corresponding to the phase of the pulsating flow. A sample-and-hold circuit takes in the charging voltage of the capacitor at predetermined timing corresponding to a change of an output of a voltage comparison circuit, and holds/outputs the taken-in voltage until next timing.
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申请公布号 |
US2012249001(A1) |
申请公布日期 |
2012.10.04 |
申请号 |
US201213435779 |
申请日期 |
2012.03.30 |
申请人 |
OKUBO TAKASHI;YAMANAKA YUJI;MITSUMI ELECTRIC CO., LTD. |
发明人 |
OKUBO TAKASHI;YAMANAKA YUJI |
分类号 |
H05B37/02 |
主分类号 |
H05B37/02 |
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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