在第二子模式(“低输出功率子模式”)中,使用脉冲宽度调制来调节VOUT,但转换器开关频率固定在第一频率。
In a second sub-mode ('low output power sub-mode'), VOUT is regulated using pulse width modulation, but the converter switching frequency is fixed at a first frequency.
在某些实施例中,转换器具有第三子模式(“高输出功率子模式”),其中使用脉冲宽度调制,但开关频率固定在第二频率。
In some embodiments, the converter has a third sub-mode (' high output power sub-mode '), in which pulse width modulation is used but the switching frequency is fixed at a second frequency.
之后阐述了脉冲宽度调制和脉冲频率调制的工作原理。
Then the principle of Pulse Width Modulation and Pulse Frequency Modulation is analyzed in detail.
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