Linearized controller for switching power converter

Details Linearized controller for switching power converter Linearized controller for switching power converter

2007-09-20

2009-11-03

Vu, Bao Q (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S282000, C323S284000, C323S286000

Reexamination Certificate

active

07612544

ABSTRACT:
A linearized controller to operate a switching power converter which includes an inductor having its first terminal coupled to a first voltage (V1) and its second terminal switched so that it alternately connects to a second, higher voltage (V2) or to a common terminal. A sawtooth voltage generator produces a ramp voltage (Vramp) having a period T and an amplitude which varies in response to a control voltage Vx, and a voltage comparator which compares Vrampto a control voltage Vy. The comparator output controls the switching such that T is divided into intervals t1and t2, during which the second terminal is connected to the common terminal or to V2, respectively. When Vy is maintained in a fixed proportion to V1, V2is driven to be in the same proportion to Vx, independently of changes in V1, providing a boost converter. A buck converter is similarly realized.

REFERENCES:
patent: 7586294 (2009-09-01), Endo
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Erickson, Robert W. et al.; “Fundamentals of Power Electronics”; Second Edition; University of Colorado; Boulder, Colorado, Springer Science+Business Media, Inc.; 2001; pp. 132-133.
Dixon, Lloyd H. , Jr.; “Switching Power Supply Topology Review”; Topic 1; Unitrode Corporation; Lexington, MA; 2001; pp. 1-12.

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