Switched-mode power supply having a standby state

Details Switched-mode power supply having a standby state Switched-mode power supply having a standby state

1986-07-30

1987-08-18

Salce, Patrick R.

Electric power conversion systems

Current conversion

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

363 19, H02M 3335

Patent

active

046881590

ABSTRACT:
A switched-mode power supply circuit having an operating state and a stand-by state in which the value of a first output voltage is considerably lower than in the operating state, whereas the value of a second output voltage is substantially the same. With the aid of a duration-determining circuit (Tr7, Tr8, R17, C12) which is controlled by a switch (Tr6) operative during the stand-by state, a low-frequency burst mode is maintained during this state in which the switch of the supply circuit conducts a number of consecutive times and subsequently becomes non-conductive during a given period. As a result the dissipation in the circuit is reduced.

REFERENCES:
patent: 3956669 (1976-05-01), Del Ciello
patent: 4024577 (1977-05-01), Diethelm
patent: 4486822 (1984-12-01), Marinus
patent: 4532457 (1985-07-01), Hoferl
patent: 4595977 (1986-06-01), von der Ohe

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