Switched power pack with protective device for limiting output v

Details Switched power pack with protective device for limiting output v Switched power pack with protective device for limiting output v

1989-06-16

1990-07-31

Wong, Peter S.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 21, 363 97, H02M 3335

Patent

active

049454633

ABSTRACT:
A switched power pack with a protective device for limiting output voltage such as in television receivers includes an avalanche-proof MOS transistor as the switching transistor in the switched power pack. The switched power pack is dimensioned so that a voltage safety margin of 10 through 20% is provided between the reliable continuous operation of the switched power pack and the destruction limit of the MOS transistor so that in the case of malfunction the output voltage of the switched power pack cannot rise to such an extent that the allowable high voltage level of the picture tube is exceeded and thereby emit dangerously high levels of x-radiation.

REFERENCES:
patent: 4389702 (1983-06-01), Clemente et al.
patent: 4686617 (1987-08-01), Colton
patent: 4737853 (1988-04-01), Graves et al.
patent: 4739462 (1988-04-01), Farnsworth et al.

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