Patent
PWM/PFM Control Circuit and Switching Power Supply Circuit
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TLDR
In this article, a PWM/PFM control circuit has a differential time generating means for forming a differential-time signal representing the difference between the pulse width of PWM and PFM control signals, 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.Abstract:
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.read more
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References
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Switching regulator capable of increasing regulator efficiency under light load
TL;DR: In this paper, a switching regulator of which efficiency is increased while the switching regulator is operated under low load condition is disclosed, which is arranged by a reference voltage circuit, an error amplifier for entering thereinto the reference voltage and a measuring voltage produced by subdividing an output voltage from the switch regulator.
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