US 12,455,583 B2
Control device for a switching voltage regulator and switching voltage regulator
Ivan Floriani, Milan (IT); and Elena Brigo, Milan (IT)
Assigned to STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on Apr. 11, 2023, as Appl. No. 18/298,758.
Claims priority of application No. 102022000008930 (IT), filed on May 3, 2022.
Prior Publication US 2023/0359235 A1, Nov. 9, 2023
Int. Cl. H02M 3/158 (2006.01); G05F 1/575 (2006.01); G05F 1/595 (2006.01); H02M 1/00 (2006.01)
CPC G05F 1/575 (2013.01) [G05F 1/595 (2013.01); H02M 1/0009 (2021.05); H02M 3/1582 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control device for a buck or buck-boost type switching voltage regulator, the control device comprising:
a first current detector configured to sense a first measurement signal indicative of a current flowing through a first side of a switching circuit of the voltage regulator, and to provide a first comparison signal as a function of the first measurement signal and of a first threshold;
a second current detector configured to sense a second measurement signal indicative of a current flowing through a second side of the switching circuit of the voltage regulator, and to provide a second comparison signal as a function of the second measurement signal and of a second threshold;
a driving-signal generation circuit configured to generate a switching control signal, based on the first comparison signal, to drive the switching circuit;
a calibration circuit configured to receive an alert signal indicative of a value of the first threshold, to compare the alert signal and the second comparison signal, and to provide a calibration signal in response to the comparison between the alert signal and the second comparison signal; and
a feedback circuit configured to receive the calibration signal and an error signal indicative of a difference between an output voltage of the switching circuit and a nominal voltage, and to provide a loop control signal as a function of the error signal and of the calibration signal,
wherein the first current detector is configured to modify the first threshold based on the loop control signal, wherein the first threshold is a function of the calibration signal.