Smooth transitioning buck-boost DC-DC converter
First Claim
1. Circuitry configured to operate in both a first mode and a second mode, and comprising:
- control circuitry configured to provide a first mode timing signal and a second mode timing signal; and
switching circuitry configured to provide a switching output signal, wherein;
during the first mode, when a first pulse-width of the switching output signal is less than a first pulse-width threshold, the first pulse-width is limited based on both the first mode timing signal and the second mode timing signal; and
during the second mode, when a second pulse-width of the switching output signal is less than a second pulse-width threshold, the second pulse-width is limited based on both the first mode timing signal and the second mode timing signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A buck-boost DC-DC converter, which includes converter control circuitry, converter switching circuitry, and a first inductive element, is disclosed. The converter control circuitry provides a buck mode timing signal and a boost mode timing signal. The converter switching circuitry provides a switching output signal. During a buck mode of the buck-boost DC-DC converter, when a buck pulse-width of the switching output signal is less than a buck pulse-width threshold, the buck pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. During a boost mode of the buck-boost DC-DC converter, when a boost pulse-width of the switching output signal is less than a boost pulse-width threshold, the boost pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. The first inductive element receives and filters the switching output signal to provide a converter output signal.
-
Citations
20 Claims
-
1. Circuitry configured to operate in both a first mode and a second mode, and comprising:
-
control circuitry configured to provide a first mode timing signal and a second mode timing signal; and switching circuitry configured to provide a switching output signal, wherein; during the first mode, when a first pulse-width of the switching output signal is less than a first pulse-width threshold, the first pulse-width is limited based on both the first mode timing signal and the second mode timing signal; and during the second mode, when a second pulse-width of the switching output signal is less than a second pulse-width threshold, the second pulse-width is limited based on both the first mode timing signal and the second mode timing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification