Low trickle current startup bias circuit and method of operation

Details Low trickle current startup bias circuit and method of operation Low trickle current startup bias circuit and method of operation

1998-11-16

2000-04-25

Tso, Edward H.

Electric power conversion systems

Current conversion

With starting arrangement

363 53, 363 89, 323901, H02M 114, H02M 7125, H02M 542

Patent

active

060551666

ABSTRACT:
For use with a power converter having a power supply control circuit, a current startup bias circuit and a method of operating the same. In one embodiment, the circuit includes: (1) a charge reservoir that receives and stores a trickle current during a startup period of the power converter, a voltage of the charge reservoir increasing as the charge reservoir stores the trickle current and (2) a latch, coupled to the charge reservoir, that activates when the voltage reaches a threshold to couple the charge reservoir to the power supply control circuit and initiate operation thereof.

REFERENCES:
patent: 5600552 (1997-02-01), McCavit et al.
patent: 5661642 (1997-08-01), Shimashita
patent: 5812385 (1998-09-01), Leu
patent: 5880942 (1999-03-01), Leu
patent: 5889393 (1999-03-01), Wrathall

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