Switching power supply controller and switching power supply

Details Switching power supply controller and switching power supply Switching power supply controller and switching power supply

2005-11-01

2005-11-01

May, Shawn Riley (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S224000

Reexamination Certificate

active

06960904

ABSTRACT:
An adder11outputs a signal VS indicating a value of (Vr−Vo), and a multiplier12outputs a control signal GS indicating a value of G(Vr−Vo) on the basis of the signal VS. An adder13outputs a signal HS on the basis of the control signal GS and a signal FS outputted from an operation circuit30, and a PWM signal generating circuit20generates a PWM signal KS on the basis of the signal HS and a ramp signal RS outputted from a ramp signal circuit15, and outputs this signal KS to a switching power supply. A counter14counts an on time of the PWM signal KS and retains a count value at a time of receiving a sample signal SMP. The operation circuit30has a high-pass filter31and an integrator32, performs an operation based on a signal DS indicating the count value outputted from the counter14, and outputs the signal FS after the operation.

REFERENCES:
patent: 5731694 (1998-03-01), Wilcox et al.
patent: A 7-222450 (1995-08-01), None
patent: A 2001-251851 (2001-09-01), None
patent: A 2002-186251 (2002-06-01), None
patent: A 2002-238254 (2002-08-01), None
Harada et al., “The Fundamentals of Switched-Mode Converters,” Corona Publishing Co., Ltd., p. 48-79, with partial translation.

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