Digital controlled power supply

Details Digital controlled power supply Digital controlled power supply

2011-04-12

2011-04-12

Vu, Bao Q (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S284000, C323S280000, C323S281000

Reexamination Certificate

active

07923980

ABSTRACT:
In a digital controlled power supply including a digital controller for generating a PWM signal which is used to turn on and off a switching element to obtain an output voltage for a load based on an input voltage, the digital controller includes an AD converter for receiving an analog output current from the power supply and converting the current into a digital value to produce a digital output current value, an arithmetic processing unit for conducting an arithmetic operation of a pulse width for each period of a sampling frequency of the AD converter or a frequency of carrier wave as a criterion to obtain the PWM signal, and a frequency controller for variably controlling the frequency of carrier wave and the sampling frequency on the basis of the digital output current value from the AD converter.

REFERENCES:
patent: 2006/0172783 (2006-08-01), Leung et al.
patent: 06-319260 (1994-11-01), None
Leonard Crane, Selecting the Best Inductor for Your DC-DC Converter, Revised Mar. 2, 2005, Coilcraft, Document 469-5, p. 4, <<http://www.inductors.ru/pdf/Doc469—selecting—inductors.pdf>>.

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