US 12,267,011 B2
Circuit for controlling converters, corresponding converter device and method
Alberto Cattani, Cislago (IT); Stefano Ramorini, Arluno (IT); and Alessandro Gasparini, Cusano Milanino (IT)
Assigned to STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on Dec. 15, 2020, as Appl. No. 17/122,132.
Application 17/122,132 is a continuation of application No. 16/406,834, filed on May 8, 2019, granted, now 10,897,200.
Claims priority of application No. 102018000005280 (IT), filed on May 11, 2018.
Prior Publication US 2021/0099087 A1, Apr. 1, 2021
Int. Cl. H02M 3/158 (2006.01); H02M 3/156 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 3/1566 (2021.05)] 9 Claims
OG exemplary drawing
 
1. A method, comprising:
generating an output signal from a converter device comprising a first half-bridge arrangement of first high-side and first low-side electronic switches driven by first drive signals and a second half-bridge arrangement of second high-side and second low-side electronic switches driven by second drive signals;
deriving a feedback signal as a function of the output signal;
determining a difference between a reference signal and the feedback signal to generate a control signal;
generating a ramp signal;
generating an intermediate signal at an intermediate node between the high-side and low-side electronic switches in the half-bridge arrangement;
applying a gain scaling to the intermediate signal to generate a gain scaled intermediate signal;
summing the ramp signal and the gain scaled intermediate signal to generate a summed signal;
comparing the control signal to the summed signal to generate a PWM-modulated signal;
controlling the first and second high-side switches and first and second low-side electronic switches in the half-bridge arrangement in response to the PWM-modulated signal;
in response to a change in operating state from using the first half-bridge arrangement to using the second half bridge arrangement, changing the gain scaling from a first gain value to a second gain value; and
in response to a change in operating state from using the second half-bridge arrangement to using the first half bridge arrangement, changing the gain scaling from the second gain value to the first gain value.