Controller having output current control for a power converter

Details Controller having output current control for a power converter Controller having output current control for a power converter

2005-11-17

2008-08-19

Sterrett, Jeffrey L. (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021150, C363S021070, C363S021080

Reexamination Certificate

active

07414865

ABSTRACT:
A controller controls the output current by measuring and controlling the switching current of the power converter. A first circuit generates a first signal in accordance with the switching current. A second circuit detects a discharge-time of the transformer. A third circuit generates a third signal by integrating the first signal with the discharge-time. The time constant of the third circuit is programmed and correlated with the switching period of the switching signal, therefore the third signal is proportional to the output current. A switching circuit generates a switching signal and controls the pulse width of the switching signal in accordance with the third signal and a reference voltage. Therefore, the output current of the power converter can be regulated.

REFERENCES:
patent: 5982640 (1999-11-01), Naveed et al.
patent: 5986897 (1999-11-01), Majid et al.
patent: 6061257 (2000-05-01), Spampinato et al.
patent: 6445598 (2002-09-01), Yamada
patent: 6519165 (2003-02-01), Koike
patent: 6611439 (2003-08-01), Yang et al.
patent: 6977824 (2005-12-01), Yang et al.
patent: 7075802 (2006-07-01), Yamashita
patent: 2002/0039298 (2002-04-01), Riggio et al.

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