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PWM/PFM Control Circuit and Switching Power Supply Circuit
PWM/PFM Control Circuit and Switching Power Supply Circuit
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机译:PWM / PFM控制电路和开关电源电路
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摘要
A PWM/PFM control circuit has a differential time generating means for forming a differential time signal representing a differential time corresponding to a difference between the pulse width of a PWM control signal and the pulse width of a PFM control signal on condition that the pulse width of the PWM control signal is smaller than the pulse width of the PFM control signal, and the oscillation frequency of a reference signal serving as a reference for forming the PWM control signal is controlled based on the differential time signal to a low value in accordance with the differential time.
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