US 12,107,499 B2
Adaptive current threshold controlled SMPS buck converter with pulse frequency modulation
Helene Esch, Seyssinet Pariset (FR); and Alexandre Meillereux, Sassenage (FR)
Assigned to STMicroelectronics (Grenoble 2) SAS, Grenoble (FR)
Filed by STMicroelectronics (Grenoble 2) SAS, Grenoble (FR)
Filed on Apr. 29, 2022, as Appl. No. 17/661,361.
Claims priority of application No. 2104945 (FR), filed on May 10, 2021.
Prior Publication US 2022/0360172 A1, Nov. 10, 2022
Int. Cl. H02M 3/158 (2006.01)
CPC H02M 3/158 (2013.01) 21 Claims
OG exemplary drawing
 
1. A switched-mode power supply (SMPS) buck converter comprising:
a first switch coupled between a first node and an internal node of the SMPS buck converter, the first node arranged to receive a supply potential;
a second switch coupled between the internal node and a second node, the second node arranged to receive a reference potential (GND);
an inductive element arranged to couple the internal node to an output node of the SMPS buck converter; and
a control circuit configured to control the first switch and the second switch such that current pulses in the inductive element have a maximum value selected, by the control circuit, from a first value and a second value based on an average current drawn at the output node being less than a second threshold and the average current drawn at the output node being greater than a first threshold, respectively, the second threshold being less than or equal to the first threshold.