发明名称 |
SWITCHING REGULATOR, CONTROL CIRCUIT THEREOF, CONTROL METHOD THEREOF AND ELECTRONIC APPARATUS |
摘要 |
A control circuit for controlling a switching transistor of a switching regulator includes a hysteresis comparator circuit comparing a feedback voltage according to an output signal of the switching regulator with a reference voltage and a threshold voltage and outputting a pulse width modulation signal as an output signal of the hysteresis comparator circuit, where the threshold voltage has a hysteresis according to the pulse width modulation signal. The control circuit further includes a driver driving the switching transistor based on the pulse width modulation signal, a phase comparator generating a phase difference signal based on a phase difference between a reference clock signal and a pulse signal corresponding to the pulse width modulation signal, and a loop filter generating a control voltage by filtering the phase difference signal. The hysteresis comparator circuit is further configured to control a response speed thereof depending on the control voltage.
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申请公布号 |
US2013038300(A1) |
申请公布日期 |
2013.02.14 |
申请号 |
US201213570652 |
申请日期 |
2012.08.09 |
申请人 |
ROHM CO., LTD.;YANAGIDA OSAMU |
发明人 |
YANAGIDA OSAMU |
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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