PWM controller with temperature regulation of switching...

Details PWM controller with temperature regulation of switching... PWM controller with temperature regulation of switching...

2007-09-25

2007-09-25

Chang, Joseph (Department: 2817)

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

C331S111000

Reexamination Certificate

active

11204533

ABSTRACT:
A circuit for controlling the switching frequency of an oscillator for a PWM controller for a switching mode power supply, comprising a first stage providing a signal which is related to the temperature of the controller for the switching mode power supply; and an oscillator having an oscillation frequency and being responsive to the signal from the first stage for changing the oscillation frequency such that the oscillation frequency decreases as the temperature increases and vice versa.

REFERENCES:
patent: 3911374 (1975-10-01), Busse et al.
patent: 4928218 (1990-05-01), Kluttz
patent: 5498995 (1996-03-01), Szepesi et al.
patent: 6356161 (2002-03-01), Nolan et al.

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