DC/DC converter

Details DC/DC converter DC/DC converter

1999-05-06

2000-05-02

Han, Y. J.

Electricity: power supply or regulation systems

Output level responsive

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

323225, 323288, G05F 156, G05F 1618

Patent

active

060576758

ABSTRACT:
A feedback amplifier generates a control signal based on an output voltage and a reference voltage. A first ramp signal generating circuit generates a first ramp signal that synchronizes with a pulse signal from an oscillator. A second ramp signal generating circuit generates a second ramp signal according to the state of a latch circuit. A comparator generates a reset signal when the total of the signal representing an inductor current and the respective levels of the first and the second ramp signals becomes higher than the level of the control signal. The latch circuit is set by the pulse signal from the oscillator and is reset by the reset signal. A driver circuit comprises a boost capacitor, and drives the switch according to the state of the latch circuit.

REFERENCES:
patent: 5627460 (1997-05-01), Bazinet et al.
patent: 5705919 (1998-01-01), Wilcox
patent: 5777461 (1998-07-01), Massie et al.
patent: 5814979 (1998-09-01), Grimm
patent: 5955872 (1999-09-01), Grimm

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