DC/AC converter and its controller IC

Details DC/AC converter and its controller IC DC/AC converter and its controller IC

2007-06-26

2007-06-26

Chen, Shih-Chao (Department: 2821)

Electric power conversion systems

Current conversion

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

C363S073000, C315S291000

Reexamination Certificate

active

10501706

ABSTRACT:
An inverter has a semiconductor switch circuit in the primary winding of a transformer such that each of the switches of the switch circuit is controlled by pulse-width modulation (PWM) to supply a constant ac current and a constant ac voltage to a load, such as a cold cathode fluorescent light, connected to a secondary winding of the transformer. A common slow-start control circuit is provided in the inverter circuit to enable a common slow startup of the PWM control of the output voltage and output current. This arrangement suppresses an excessive voltage and an inrushing current during a startup.

REFERENCES:
patent: 5444336 (1995-08-01), Ozawa et al.
patent: 6008589 (1999-12-01), Deng et al.
patent: 6075325 (2000-06-01), Kouno et al.
patent: 6377480 (2002-04-01), Sase et al.
patent: 56-007493 (1981-01-01), None
patent: 04-190679 (1992-07-01), None

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