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A pulse frequency modulation (PFM) with discrete frequency is designed.
设计了一种离散频率的PF M控制方式。
Then the principle of Pulse Width Modulation and Pulse Frequency Modulation is analyzed in detail.
之后阐述了脉冲宽度调制和脉冲频率调制的工作原理。
It operates both in current mode at high output load and in pulse frequency modulation (PFM) at light load to reduce the power dissipation.
它在重载下工作于电流控制模式，轻载下工作于脉冲频率调制(PF M)模式来降低功耗。
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