发明名称 |
POWER FACTOR CONTROL CIRCUIT AND POWER FACTOR CONTROL METHOD |
摘要 |
A power factor control circuit has a power factor controller that determines if the power factor control circuit is operated at a continuous current mode (CCM) or a discrete current mode (DCM), and outputs PWM signals corresponding to the present current mode. A duty cycle of the PWM signals is equal to a sum of a feed-forward control parameter and a current compensation parameter. The current compensation parameter contains a difference value between a reference current and an inductor current in the power factor control circuit. Accordingly, a switching power supply circuit can acquire the PWM signals corresponding to the present current mode to effectively resolve the issue of harmonic distortion.
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申请公布号 |
US2013076317(A1) |
申请公布日期 |
2013.03.28 |
申请号 |
US201113240247 |
申请日期 |
2011.09.22 |
申请人 |
YEH CHIA-AN;CHEN HSIANG-YI |
发明人 |
YEH CHIA-AN;CHEN HSIANG-YI |
分类号 |
G05F1/70 |
主分类号 |
G05F1/70 |
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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