Blocking oscillator switched mode power supply

Details Blocking oscillator switched mode power supply Blocking oscillator switched mode power supply

1984-03-12

1986-06-03

Salce, Patrick R.

Electric power conversion systems

Current conversion

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

331112, 363 37, H02P 1322, H02M 3335

Patent

active

045933472

ABSTRACT:
An improved blocking oscillator switched mode power supply, which is protected against a voltage rise on the primary side of a transformer of the switched mode power supply, which occurs in a no-load operation and could endanger the circuit. In a design of the blocking oscillator switched mode power supply according to the invention, the output of the variable gain amplifier, connected in known manner to an input of the pulse duration modulator (or pulse width modulator) of the control circuit of the blocking oscillator, is connected through an operational amplifier, which serves as comparator and is actuated by an auxiliary voltage to an additional input of the pulse duration modulator. The pulse duration modulator is provided in the usual manner for controlling the base of a switching transistor, forming a connection between one end of the primary side of the transformer and the terminal for the reference potential. Furthermore, for the solution of the problem referred to in a design of the switched mode power supply corresponding to the invention, the output of a pulse processing circuit is connected via a switching circuit or respectively via a capacitor to the input of the variable gain amplifier, actuated at the same time by the output of the control voltage generator in the usual manner.

REFERENCES:
patent: 4017787 (1977-04-01), Hara et al.
patent: 4335423 (1982-06-01), Koizumi et al.
patent: 4450514 (1984-05-01), Peruth
patent: 4481565 (1984-11-01), Colton
Funkschau 1975, "Ein Sperrwandler-Netzmodul mit Netztrennung", Dangschat et al., pp. 40 to 43.
"Schaltnetzteile", by Wuestehube et al., pp. 182 to 183.
"Schaltnetzteile mit der IS TDA 4600", Siemens publication, pp. 6 and 7.

Affiliated with

Also associated with

Rating

Blocking oscillator switched mode power supply does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Blocking oscillator switched mode power supply, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blocking oscillator switched mode power supply will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1235608