Control circuit and control method of current mode control...

Details Control circuit and control method of current mode control... Control circuit and control method of current mode control...

2011-01-25

2011-01-25

Vu, Bao Q (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S284000

Reexamination Certificate

active

07876077

ABSTRACT:
The invention presents a control circuit and a control method of DC-DC converter capable of suppressing subharmonic oscillation of coil current even if the on-duty is over 50%. An error amplified signal V1is an output voltage of an error amplifier ERA1. An offset voltage unit Ve2outputs a lower limit set voltage V2obtained by subtracting offset voltage e2from error amplified signal V1. A voltage comparator COMP2compares lower limit set voltage V2output from offset voltage Ve2, and output voltage signal VIL. When the voltage value of output voltage signal VIL is decreased to lower limit set voltage V2(region E2), the output of voltage comparator COMP2changes from low level to high level. As a result, main transistor FET1is set in conductive state. On the other hand, when the voltage value of output voltage signal VIL reaches an error amplified signal V1(region E1), main transistor FET1is set in non-conductive state.

REFERENCES:
patent: 4426734 (1984-01-01), Tults et al.
patent: 5481178 (1996-01-01), Wilcox et al.
patent: 5731731 (1998-03-01), Wilcox et al.
patent: 5734259 (1998-03-01), Sisson et al.
patent: 5739709 (1998-04-01), Banno
patent: 5939871 (1999-08-01), Tanaka
patent: 6157182 (2000-12-01), Tanaka et al.
patent: 6183918 (2001-02-01), Nishiki
patent: 6396252 (2002-05-01), Culpepper et al.
patent: 6580258 (2003-06-01), Wilcox et al.
patent: 6873140 (2005-03-01), Saggini et al.
patent: 6922042 (2005-07-01), Umemoto et al.
patent: 7180274 (2007-02-01), Chen et al.
patent: 2006/0061343 (2006-03-01), Lipcsei et al.
patent: 11-041924 (1999-02-01), None
patent: 2003-244953 (2003-08-01), None
patent: 2004-040856 (2004-02-01), None
patent: 2004-248374 (2004-09-01), None
patent: 2005-039925 (2005-02-01), None

Affiliated with

Also associated with

Rating

Control circuit and control method of current mode control... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control circuit and control method of current mode control..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control circuit and control method of current mode control... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2725410