Power supply for switching operation, electronic apparatus...

Details Power supply for switching operation, electronic apparatus... Power supply for switching operation, electronic apparatus...

2008-01-01

2008-01-01

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S351000

Reexamination Certificate

active

07315159

ABSTRACT:
An object of this invention is to finely set the voltage at high speed without decreasing the efficiency. In a power supply for switching operation including a switching circuit, an output circuit, a control table which stores data on the ON and OFF periods of the switching circuit in correspondence with a set voltage, an arithmetic processing unit which performs reading operation from the control table and PWM operation, and a digital control unit which controls the switching circuit by outputting a PWM signal, feedback control based on the output voltage is performed in a case where the output voltage is not changed. When changing the output voltage, the feedback control is switched over to control based on data in the control table to change the output voltage at high speed.

REFERENCES:
patent: 6663209 (2003-12-01), Yoshida
patent: 6791305 (2004-09-01), Imai et al.
patent: 6956360 (2005-10-01), Matsuura et al.
patent: 7038438 (2006-05-01), Dwarakanath et al.
patent: 7042202 (2006-05-01), Sutardja et al.
patent: 2001-225457 (2001-08-01), None
patent: 2003-259629 (2003-09-01), None

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