发明名称 |
CONSTANT-VOLTAGE AND CONSTANT-CURRENT BUCK CONVERTER AND CONTROL CIRCUIT |
摘要 |
A control circuit is provided for a buck converter that includes at least an inductor coupled to an output of the buck converter. The control circuit includes a power switch configured for coupling to a line voltage and configured for charging the inductor, an input line voltage sampling circuit, and a constant-voltage (CV) and constant-current (CC) control module coupled to the power switch. During a charging period of the inductor, the CV and CC control module is configured to control the power switch to provide a constant output current by maintaining a constant peak inductor current, even when the input line voltage changes. During a discharging period of the inductor, the CV and CC control module is configured to monitor the sensed output voltage to control the power switch to provide a constant output voltage. |
申请公布号 |
US2014239930(A1) |
申请公布日期 |
2014.08.28 |
申请号 |
US201314033341 |
申请日期 |
2013.09.20 |
申请人 |
Wang Hu;Zhu Yajiang;Fei Ruixia;Lv Shuzhuang |
发明人 |
Wang Hu;Zhu Yajiang;Fei Ruixia;Lv Shuzhuang |
分类号 |
H02M3/10 |
主分类号 |
H02M3/10 |
代理机构 |
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代理人 |
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主权项 |
1. A control circuit for a buck converter, the buck converter including at least an inductor coupled to an output of the buck converter, the control circuit comprises:
a power switch configured for coupling to a line voltage and configured for charging the inductor; an input line voltage sampling circuit; and a constant-voltage (CV) and constant-current (CC) control module coupled to the power switch, wherein the CV and CC control module is configured to:
during a charging period of the inductor, control the power switch to provide a constant output current by maintaining a constant peak inductor current when the input line voltage changes; andduring a discharging period of the inductor, to monitor the sensed output voltage to control the power switch to provide a constant output voltage. |
地址 |
Shanghai CN |