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发明授权
CN105896943B 一种控制电路、控制方法及应用其的开关电源 有权

一种控制电路、控制方法及应用其的开关电源
摘要：
本发明公开了一种控制电路、控制方法及应用其的开关电源，所述电压调节电路根据不同时间段内输出电压信号的差值产生第二补偿信号，在第一工作时间段，控制和驱动电路根据所述第一补偿信号产生所述开关关断信号；在第二工作时间段内，控制和驱动电路根据所述第二补偿信号产生所述开关关断信号。从而使得在电路正常工作状态中，功率级电路的输出电压能够维持正常值，在系统电路工作在睡眠状态中，通过第二补偿信号可以补偿输出电压的跌落，维持输出电压的稳定，降低输出电压纹波，从而降低输出端的瓷片电容噪声。
摘要（英）：

A control circuit for generating a switching control signal to control switching operations of a power switch in a power stage circuit, can include: a first control loop configured to receive a first voltage feedback signal, and to generate a first compensation signal; a voltage regulating circuit configured to receive an output voltage signal of the power stage circuit, and to generate a second compensation signal according to a difference between an output voltage signal of the power stage circuit during different time periods; and control and driving circuit configured to receive the first and second compensation signals and a sense voltage signal that represents a current through an inductor of the power stage circuit, and to generate an OFF signal, and a switching control signal according to the OFF signal and an ON signal.

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