Computer power supply with optically isolated shutdown circuits

Details Computer power supply with optically isolated shutdown circuits Computer power supply with optically isolated shutdown circuits

1989-09-14

1990-05-29

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

361 18, 307125, 323325, 323349, H02H 710

Patent

active

049300628

ABSTRACT:
A computer D.C. power supply comprises an AC-DC converter for converting alternating-current power from an external A.C. power source to direct-current power. A rectifier is connected to the A.C. power source to supply a D.C. voltage to a first light-emitting diode to cause it to emit light to a phototransistor, which is connected in the AC-DC converter for activating it in response to that light. A photo-thyristor is also connected to the rectifier and is optically coupled with a second light-emitting diode for establishing a low-impedance path across the first light-emitting diode in response to light from the second light-emitting diode. A switching circuit, connected to the output terminals of the AC-DC converter, is responsive to a shutdown command signal applied from a computer for activating the second light-emitting diode to cause light to be emitted therefrom to the photo-thyristor. A latching circuit is connected between the rectifier circuit and a gate electrode of the photo-thyristor to keep it conducting until the alternating-current power is turned off.

REFERENCES:
patent: 4709320 (1987-11-01), Konopka
patent: 4847720 (1989-07-01), Dezonno

Affiliated with

Also associated with

Rating

Computer power supply with optically isolated shutdown circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Computer power supply with optically isolated shutdown circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer power supply with optically isolated shutdown circuits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-525204