DC-DC converter with step-up and step-down control capable...

Details DC-DC converter with step-up and step-down control capable... DC-DC converter with step-up and step-down control capable...

2005-05-18

2008-10-28

Sterrett, Jeffrey L. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a transformer or inductor as the final control device

C323S284000, C332S110000

Reexamination Certificate

active

07443147

ABSTRACT:
When both step-up PWM control and step-down PWM controls are executed, the offset of the ON/OFF switching timing for step-up PWM control and/or the offset of ON/OFF switching timing for step-down PWM control are changed to become identical. By synchronizing ON/OFF switching timing for step-up PWM control and ON/OFF switching timing for step-down PWM control, the loss on switching can be reduced.

REFERENCES:
patent: 5402060 (1995-03-01), Erisman
patent: 5914591 (1999-06-01), Yasuda et al.
patent: 6166527 (2000-12-01), Dwelley et al.
patent: 6275016 (2001-08-01), Ivanov
patent: 6580253 (2003-06-01), Kanakubo et al.
patent: 6788033 (2004-09-01), Vinciarelli
patent: 2006/0208718 (2006-09-01), Nitta et al.
patent: 2006/0238182 (2006-10-01), Yoshino
patent: 10-225108 (1998-08-01), None
Schoichi Nitta, Voltage Step-Up/Ste-Down DC-DC Converter, Nov. 18, 2004, Japanese Patent Office, JP 2004-328964 A, pp. 1-15.

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