发明名称 |
Constant on-time switching regulator, and control method and on-time calculation circuit therefor |
摘要 |
The present invention discloses a constant on-time switching regulator, a control method therefor, and an on-time calculation circuit for calculating an on-time period of a constant on-time switching regulator. The on-time calculation circuit calculates on-time according to practical conditions. It includes: a driver gate receiving a gate signal of a power switch in a switching regulator, the driver gate operating between high and low levels of a first reference voltage and ground; a low pass filter receiving an output from the driver gate and generating a second reference voltage, a ratio between the second reference voltage and the first reference voltage being substantially the same as a duty ratio of the gate signal; and an on-time generator comparing the second reference voltage with a ramp signal to determine an on-time of the power switch. |
申请公布号 |
US8669747(B2) |
申请公布日期 |
2014.03.11 |
申请号 |
US201113135990 |
申请日期 |
2011.07.20 |
申请人 |
FANG LI-WEN;TAI TING-JUNG;YANG CHIH-HAO;RICKTEK TECHNOLOGY CORPORATION, R.O.C. |
发明人 |
FANG LI-WEN;TAI TING-JUNG;YANG CHIH-HAO |
分类号 |
G05F1/10 |
主分类号 |
G05F1/10 |
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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