Buck-boost control logic for PWM regulator

Details Buck-boost control logic for PWM regulator Buck-boost control logic for PWM regulator

2006-05-05

2008-10-07

Sterrett, Jeffrey L. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a transformer or inductor as the final control device

C323S225000, C323S283000

Reexamination Certificate

active

07432689

ABSTRACT:
A PWM regulator is operated either a buck mode or a boost mode depending on whether the input voltage is above or below the desired regulated output voltage. The technique uses two sawtooth ramps 180 degrees out of phase. Where the two ramps cross each other is a buck/boost transition level. An error voltage, corresponding to a required duty cycle to achieve a regulated voltage, is compared to the two ramps. The transition from one mode to the other occurs when the error voltage passes the buck/boost transition level of the two ramps. A logic circuit supplies PWM pulses to either buck switching transistors or the boost switching transistors in a power stage of the regulator, depending on the whether the error voltage is above or below the buck/boost transition level, to achieve the regulated voltage.

REFERENCES:
patent: 6166527 (2000-12-01), Dwelley et al.
patent: 6348781 (2002-02-01), Midya et al.
patent: 7268525 (2007-09-01), Ishii et al.

Affiliated with

Also associated with

Rating

Buck-boost control logic for PWM regulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Buck-boost control logic for PWM regulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Buck-boost control logic for PWM regulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3999828