公开(公告)号：EP4243261A1

公开(公告)日：2023-09-13

申请号：EP23156010.3

申请日：2023-02-10

Applicant: STMicroelectronics S.r.l.

Inventor： MORETTI, Emanuele ,  FLORIANI, Ivan ,  ALTAMURA, Giulia

IPC: H02M1/32 ,  H02M3/158 ,  H02M1/00

Abstract: A control module (120) for a switching buck-boost converter (1) including an inductor (12), a capacitor (C OUT ), a first top switch (2) and a second top switch (4), a first bottom switch (6) and a second bottom switch (8) and a diode (24) coupled to the second top switch (4). The control module (120) controls the switching buck-boost converter (1) so as to alternate: first time periods (T switching ), in which the second top switch (4) is open and cycles of charge (T ON ,T' ON ) and discharge (T OFF ,T' OFF ) of the inductor (12) are carried out, during which the inductor (12) is traversed by a current (I L ) that also passes through the diode (24) and charges the capacitor (C OUT ); and second time periods (T OV_MODE ), in which the first and second top switches (2, 4) are open and the first and second bottom switches (6, 8) are closed so that the current (I L ) in the inductor (12) recirculates, and the capacitor (C OUT ) is discharged by a current (I LOAD ) that flows in the load (15). The control module (12) includes a circuit (60) that compares the duration (T OV_MODE ) of each second time period with a limit duration (Tth_ov) and detects the occurrence of an overcurrent if the duration (T OV_MODE ) of the second time period is shorter than the limit duration (Tth_ov).

公开(公告)号：EP4340203A9

公开(公告)日：2024-05-01

申请号：EP23195813.3

申请日：2023-09-06

Applicant: STMicroelectronics S.r.l.

Inventor： FLORIANI, Ivan ,  CASTORINA, Stefano ,  ALTAMURA, Giulia ,  MORETTI, Emanuele

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M1/0025 ,  H02M1/0035 ,  H02M3/1582 ,  H02M1/0009

Abstract: The control device (55) is for a switching voltage regulator (50) having a switching circuit (53). The control device receives a set of measurement signals (VOUT, IL) having a first measurement signal indicative of an output voltage of the switching voltage regulator. The control device has: a burst-mode controller (97) configured to monitor the output voltage with respect to a first threshold (Vth,L) and a second threshold (Vth,H) higher than the first threshold, and to provide, in response, a burst signal (BURST_M); and a driving-signal generation stage (92, 94, 95, 96) configured to provide at least one switching control signal (PWM, T1, T2, T3, T4) for the switching circuit starting from the burst signal and from the set of measurement signals. The driving-signal generation stage has a feedback module (92) configured to provide a control signal (VC, IC) as a function of the burst signal and of an error signal (VE) indicative of a difference between the first measurement signal and a reference signal (VREF).

公开(公告)号：EP4340203A1

公开(公告)日：2024-03-20

申请号：EP23195813.3

申请日：2023-09-06

Applicant: STMicroelectronics S.r.l.

Inventor： FLORIANI, Ivan ,  CASTORINA, Stefano ,  ALTAMURA, Giulia ,  MORETTI, Emanuele

IPC: H02M3/158 ,  H02M1/00

Abstract: The control device (55) is for a switching voltage regulator (50) having a switching circuit (53). The control device receives a set of measurement signals (V OUT , I L ) having a first measurement signal indicative of an output voltage of the switching voltage regulator. The control device has: a burst-mode controller (97) configured to monitor the output voltage with respect to a first threshold (V th,L ) and a second threshold (V th,H ) higher than the first threshold, and to provide, in response, a burst signal (BURST_M); and a driving-signal generation stage (92, 94, 95, 96) configured to provide at least one switching control signal (PWM, T1, T2, T3, T4) for the switching circuit starting from the burst signal and from the set of measurement signals. The driving-signal generation stage has a feedback module (92) configured to provide a control signal (V C , I C ) as a function of the burst signal and of an error signal (V E ) indicative of a difference between the first measurement signal and a reference signal (V REF ).