Method and circuit for controlling the output characteristics of

Details Method and circuit for controlling the output characteristics of Method and circuit for controlling the output characteristics of

1996-05-21

1997-08-12

Nguyen, Matthew V.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 20, H02M 3335

Patent

active

056572115

ABSTRACT:
The invention relates to a method and a circuit to control the output voltage and current of a switched-mode power supply. In order to restrict the output current, a voltage value proportional to the primary current of a switched-mode power supply is measured and compared to a variable reference voltage U.sub.ext the value of which is determined by the total effect of the constant charging current of a capacitor C.sub.ext and a discharge circuit operating in step with the secondary diode of the power supply. If the voltage value proportional to the primary current is bigger than said reference voltage, the switching pulses of the primary current switch are shortened. In order to restrict the output voltage, an image voltage is generated for the secondary voltage of the power supply transformer which is filtered and rectified and combined with the aforementioned reference voltage in order to produce pulse-width-modulated switching pulses of the primary current switch.

REFERENCES:
patent: 5331532 (1994-07-01), Iwai et al.
patent: 5448466 (1995-09-01), Erckert
patent: 5499175 (1996-03-01), Noro
International Conference on Consumer Electronics IEEE 1991, 5-7 Jun., 1991, Rosemont, IL pp. 58-59, Kieffer et al, "Switch mode power supply, new concept".
Revue Generale De L'Electricite, No. 5, May 1992, Paris, pp. 117-123, "un controleur de'alimentation fly-back avec controle efficace des surcharges".
Eighth Annual Applied Power Electronics Conference and Exposition, 7-11 May 1993 San Diego, California, pp. 527-532, Gass et al.

Affiliated with

Also associated with

Rating

Method and circuit for controlling the output characteristics of does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and circuit for controlling the output characteristics of, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and circuit for controlling the output characteristics of will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-164668