发明名称 |
CONTROL CIRCUIT OF SWITCHING POWER SUPPLY FOR DRIVING LIGHT EMITTING ELEMENTS, AND LIGHT EMITTING DEVICE AND ELECTRONIC APPARATUS USING THE SAME |
摘要 |
A control circuit of a switching power supply for supplying a drive voltage to a light emitting element is provided. The control circuit includes a pulse width modulator which generates a pulse signal whose duty ratio is adjusted such that a detection voltage corresponding to an output voltage of the switching power supply is equal to a predetermined reference voltage, a driver which drives a switching element of the switching power supply based on the pulse signal, and a standby control unit which stops driving of the switching element once a predetermined time has passed after a standby signal steps down to a level indicating a standby state, and to shut down the control circuit and a current source.
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申请公布号 |
US2012229045(A1) |
申请公布日期 |
2012.09.13 |
申请号 |
US201213413928 |
申请日期 |
2012.03.07 |
申请人 |
KIKUCHI HIROKI;IN JUNG-NAM;AHN MIN-KI;ROHM CO., LTD. |
发明人 |
KIKUCHI HIROKI;IN JUNG-NAM;AHN MIN-KI |
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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