DC-DC converter

Details DC-DC converter DC-DC converter

2008-04-22

2008-04-22

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

With voltage multiplication means

C323S224000, C361S111000

Reexamination Certificate

active

07362595

ABSTRACT:
A DC-DC converter includes a regeneration preventing circuit to bring a synchronous rectifying switching element to an OFF-state when an output of an error amplifier is lower than a lower-limit potential of a triangular-wave signal, that is, when the output of the error amplifier deviates from a voltage range of the triangular-wave signal in a side (direction), which would cause a smaller ON duty ratio of a main switching element. This configuration prevents a rise of voltage in an input side due to a regenerative operation at startup when a pre-bias voltage exists. Also, the configuration prevents fluctuations of an output voltage at a sudden change of a load current and a drop of the output voltage at transition from a soft start state to a normal operation state when the load current is small.

REFERENCES:
patent: 5177676 (1993-01-01), Inam et al.
patent: 5414341 (1995-05-01), Brown
patent: 5457624 (1995-10-01), Hastings
patent: 5920475 (1999-07-01), Boylan et al.
patent: 6778417 (2004-08-01), Itakura et al.
patent: 2003-259627 (2003-09-01), None
“Low-Input Voltage-Mode Synchronous Buck Controller”, Texas Instruments Jan. 2002.

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