DC-DC converter

Electricity: power supply or regulation systems – Output level responsive – Using a transformer or inductor as the final control device

Reexamination Certificate

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Details

C323S222000, C323S225000, C323S284000

Reexamination Certificate

active

07075277

ABSTRACT:
A DC—DC converter that receives input of a direct current voltage such as a battery and supplies a controlled direct current voltage to a load is simplified. It comprises a voltage step-down converter section consisting of a first switch2, a first rectifying means3and an inductor4, a voltage step-up converter section consisting of an inductor4, a second switch5and a second rectifying means6, and a control section consisting of an output capacitor7, an error amplifying circuit10, an oscillation circuit11and a pulse width control circuit12. An oscillation voltage Vt from the oscillation circuit11is compared with an error voltage Ve from the error amplifying circuit10and a duty ratio of each switch is adjusted to control the operation of voltage step-down, voltage step-up and step-down, and voltage step-up.

REFERENCES:
patent: 4395675 (1983-07-01), Toumani
patent: 6037755 (2000-03-01), Mao et al.
patent: 6166527 (2000-12-01), Dwelley et al.
patent: 6348781 (2002-02-01), Midya et al.
patent: 6946820 (2005-09-01), Ishii et al.
patent: 55068877 (1980-05-01), None
patent: 2000-166223 (2000-06-01), None

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