DC-DC converter and power-supply switching circuit

Details DC-DC converter and power-supply switching circuit DC-DC converter and power-supply switching circuit

1999-07-20

2000-08-15

Riley, Shawn

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323901, G05F 110

Patent

active

061041734

ABSTRACT:
A power-supply switching portion compares an input voltage and an output voltage, after a boost converter circuit is started. Before a step-up operation is started, that is, in a condition in which the input voltage is higher than the output voltage, the power-supply switching portion provides, via a first MOSFET, the input voltage to a power-supply line. The power-supply line supplies operation power for the boost converter circuit. After the step-up operation is started, that is, in a condition in which the output voltage is equal to or higher than the input voltage, the power-supply switching portion provides, via a second MOSFET, the output voltage, instead of the input voltage, to the power-supply line.

REFERENCES:
patent: 4370701 (1983-01-01), Western
patent: 5142218 (1992-08-01), Palara et al.
patent: 5581453 (1996-12-01), Ueta et al.
patent: 5880942 (1999-03-01), Leu

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