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 ).

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：EP4113815A1

公开(公告)日：2023-01-04

申请号：EP22180463.6

申请日：2022-06-22

Applicant: STMicroelectronics S.r.l.

Inventor： FLORIANI, Ivan ,  BRIGO, Elena

IPC: H02M3/158 ,  H02M1/00 ,  G05F1/575

Abstract: A control device (62) for a switching voltage regulator (52) configured to operate in a plurality of operating conditions and having a switching circuit (60). The control device has a first input configured to receive a measurement signal representative of an output voltage of the switching circuit; a state-determination block (89), coupled to the first input and configured to generate an actual operating condition signal (MOD, DIAG) of the switching voltage regulator; and a driving signals generation module (91, 92, 94) configured to generate at least one switching command signal for the switching circuit from an error signal representative of a difference between the output voltage and a nominal voltage. The driving signals generation module has an error-compensation circuit (91, 100) having a transfer function and configured to generate a control signal (Vc, Ic, Ioc) from the error signal and the actual operating condition signal, wherein the control signal is a function of the actual operating condition of the switching voltage regulator.

公开(公告)号：EP4297258A1

公开(公告)日：2023-12-27

申请号：EP23178174.1

申请日：2023-06-08

Applicant: STMicroelectronics S.r.l.

Inventor： CASTORINA, Stefano ,  BRIGO, Elena ,  FLORIANI, Ivan

IPC: H02M1/00 ,  H02M3/158

Abstract: The control device (55) is for a switching voltage regulator (50) having a switching circuit (53). The control device receives an input voltage (V in ) and an output voltage (V out ) of the switching circuit and a measurement signal indicative of a current (I L ) of the switching circuit. The control device has: a feedback module (92) that detects an error signal (V E ) indicative of a difference between the output voltage and a nominal voltage (V ref ), and provides a control signal (I c ) as a function of the error signal; a threshold-correction module (98, 100, 102) that provides an offset signal (I bias ) and a ramp signal (I slope ); and a driving-signal generation module (94, 96, 97) coupled to the feedback module and to the threshold-correction module, which receives the measurement signal, compares the measurement signal with a threshold (I th ) and, in response, provides a modulated signal (PWM, T1, T2, T3, T4) for driving the switching circuit. The threshold is a function of the control signal, of the offset signal, and of the ramp signal. The threshold-correction module provides the offset signal as a function of the input voltage and/or of the output voltage.

公开(公告)号：EP4274070A1

公开(公告)日：2023-11-08

申请号：EP23170768.8

申请日：2023-04-28

Applicant: STMicroelectronics S.r.l.

Inventor： FLORIANI, Ivan ,  BRIGO, Elena

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

Abstract: The control device (55) is for a switching voltage regulator (50) of the buck or buck-boost type. The regulator has a switching circuit (53) with a first side (88) and a second side (89). The control device has: a first detector (94) of a first measurement signal (V ds ) indicative of a current (I ds ) flowing in the first side, and providing a first comparison signal (COMP_HS) as a function of a first threshold (V th,HS ); a second detector (95) of a second measurement signal (V RS ) indicative of a current (I RS ) flowing in the second side, and providing a second comparison signal (COMP_LS) as a function of a second threshold (V th,LS ); a driving-signals generation module (96) which generates a switching control signal (PWM) from the first comparison signal to drive the switching circuit; a calibration module (149) which receives an alert signal (COMP_HS, IMAX_FLAG) indicative of the first threshold (I th,HS , V th,HS ), compares the alert signal and the second comparison signal, and provides a calibration signal (CAL) in response; and a feedback module (92) which provides a control signal (I c,ds ) as a function of an error signal and of the calibration signal. The first detector modifies the first threshold from the loop control signal. The first threshold is therefore a function of the calibration signal.

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：EP4340199A1

公开(公告)日：2024-03-20

申请号：EP23196890.0

申请日：2023-09-12

Applicant: STMicroelectronics S.r.l.

Inventor： FLORIANI, Ivan ,  BRIGO, Elena

IPC: H02M1/38 ,  H02M3/158 ,  H02M7/5387

Abstract: Control module for an electronic circuit (2,4,16,18;DH1,DL1,GH1,GL1) which includes at least a first and a second switch (2,4;GH1,GL1), including: an event detector stage (130), which receives logic electrical signals (PWM,DCM,OV,REG_MOD;sROT,sSENSE); a pulse generator circuit (132), which is coupled to the event detector stage and generates a dead time signal (sPULSE) as a function of edges of the logic electrical signals detected by the event detector stage, the dead time signal including pulses delimited, each, by an edge of a first type and by a subsequent edge of a second type; a combinatorial sampling stage (134,186,189; 134,237), which generates, on the basis of a truth table and the logic electrical signals, at least a first and a second sampled preliminary signal (CMD_HS_sam, CMD_LS_sam), whose values are updated at each edge of the first type of the dead time signal; and an update stage (188,190;238), which, at each pulse of the dead time signal, updates the values of the first and the second control signals as a function of the first and the second sampled preliminary signals, subsequently to the edge of the first type or subsequently to the edge of the second type of the pulse of the dead time signal. Figure 3