Start-up circuit for a switch mode power supply

Details Start-up circuit for a switch mode power supply Start-up circuit for a switch mode power supply

1993-10-08

1995-09-19

Pellinen, A. D.

Electric power conversion systems

Current conversion

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

363 49, 323901, H02M 3335

Patent

active

054521955

ABSTRACT:
An integrated control circuit forms a driver stage of an output transistor of a switch mode power supply. During a start-up interval of a run mode operation, the control circuit does not consume supply current and does not produce a switching control signal for switching the transistor. During an initialization interval that follows the start-up interval, a reference voltage source that is included in the control circuit is turned on and internal conditions in the control circuit are defined. The switching control signal is generated following the initialization interval.

REFERENCES:
patent: 4277824 (1981-07-01), Alberkrack
patent: 4864485 (1989-09-01), Rilly
patent: 5072353 (1991-12-01), Feldtkeller
Elektronik 3/2.2 1990, Bauelemente, pp. 44 to 48 Wilfried Blaesner "Schaltnezteile mit Stromregelung einfach realisiert".
Eleltronik 9/27.4 1990, Stromversorgung, pp. 134 to 140 Wilfried Blaesner "Erhohte Betriebssicherheit und niedrigere Kosten".

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