Status indicating circuit for paralleled switching power supplie

Details Status indicating circuit for paralleled switching power supplie Status indicating circuit for paralleled switching power supplie

1988-09-19

1989-08-08

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323283, 363 41, 363 56, G05F 1569

Patent

active

048556653

ABSTRACT:
A keep-alive circuit for a regulated switched-type power supply for forcing the power supply to generate power pulses under conditions where the apparent output voltage level is such as to cause the regulator circuit normally to reduce the power pulses effectively to zero. The keep-alive circuitry responds to the absence of the power pulses over a predetermined time interval to modify the regulating circuit so that the regulating circuit responds to a different output voltage level to force the power supply to generate a power pulse under the aforesaid conditions. The action is made cyclic and the power supply is thereby caused to generate a series of low frequency power pulses indicating that it is still alive.

REFERENCES:
patent: 3824450 (1974-07-01), Johnson et al.
patent: 4074182 (1978-02-01), Weischedel
patent: 4194147 (1980-03-01), Payne et al.
patent: 4359679 (1982-11-01), Regan

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