公开(公告)号：US20230055825A1

公开(公告)日：2023-02-23

申请号：US17885901

申请日：2022-08-11

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro GASPARINI ,  Mauro LEONCINI ,  Claudio LUISE ,  Alberto CATTANI ,  Massimo GHIONI ,  Salvatore LEVANTINO

IPC: H02M3/158 ,  H05B45/3725

Abstract: A Single Input Dual Output converter includes a first switch coupling an input to a first inductor terminal, a second switch coupling a second inductor terminal to ground, a third switch coupling the second inductor terminal to a positive output, and a fourth switch coupling the first inductor terminal to a negative output. During time-shared control, the negative and positive outputs are independently served by conversion cycles. Each conversion cycle includes: a positive phase with a positive charge phase (closing only the first and second switches), followed by an additional phase (closing only the first and third switches for a given time duration), and followed by a positive discharge phase (closing only the third and fourth switches). Each conversion cycle further includes a negative phase with a negative charge phase (closing only the first and second switches) followed by a negative discharge phase (closing only the second and fourth switches).

公开(公告)号：US20220329146A1

公开(公告)日：2022-10-13

申请号：US17851901

申请日：2022-06-28

Applicant: STMicroelectronics S.r.l.

Inventor： Alberto CATTANI

IPC: H02M1/00 ,  H02M3/158

Abstract: A first switch couples an input node receiving a main control signal for a main switching stage of a multi-phase converter to an output node delivering a secondary control signal for a secondary switching stage following actuation of the secondary switching stage. A second switch couples the output node to a capacitor during a time period of actuation/deactuation of the secondary switching stage. Current is sourced to the capacitor during the actuation time period or sunk from the capacitor during the deactuation time period. The sourced or sunk current may be generated proportional to the main control signal.

公开(公告)号：US20220263412A1

公开(公告)日：2022-08-18

申请号：US17671163

申请日：2022-02-14

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro BERTOLINI ,  Alberto CATTANI ,  Stefano RAMORINI ,  Alessandro GASPARINI

IPC: H02M3/158 ,  H02M1/08 ,  H02M1/00

Abstract: A control circuit operates to control a switching stage of an electronic converter. The control circuit includes: first terminals providing drive signals to electronic switches of the switching stage; a second terminal receiving from a feedback circuit a first feedback signal proportional to a converter output voltage; and a third terminal configured to receive from a current sensor a second feedback signal proportional to an inductor current. A driver circuit provides the drive signals as a function of a PWM signal generated by a generator circuit as a function of the first and second feedback signals, a reference voltage and a slope compensation signal. A mode selection signal is generated as a function of a comparison between the input voltage and the output voltage. A feed-forward compensation circuit is configured to source and/or sink a compensation current as a function of a variation in the mode selection signal.

公开(公告)号：US20210226531A1

公开(公告)日：2021-07-22

申请号：US17147123

申请日：2021-01-12

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro BERTOLINI ,  Alberto CATTANI ,  Alessandro GASPARINI

IPC: H02M3/156 ,  H03F3/45 ,  G05F3/26 ,  G05F1/575 ,  G05F1/56 ,  G05F1/46

Abstract: A switching converter includes a voltage conversion circuit providing an output voltage from an input voltage and a PWM voltage generated in response to first and second oscillating voltages. The input stage of a transconductor circuit provides an input reference current following a difference between a reference voltage and a voltage dependent on the output voltage and according to a transconductance, and an output stage for providing an output reference current from the input reference current. A phase shifter shifts an oscillating reference voltage according to the output reference current to obtain the first and second oscillating voltages. The transconductance is controlled in response to the input voltage resulting in a change of the input reference current. Compensation for that change is provided by subtracting a variable compensation current from the input reference current, where the variable compensation current is generated in response to the input voltage.

公开(公告)号：US20190222204A1

公开(公告)日：2019-07-18

申请号：US15873270

申请日：2018-01-17

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Alberto CATTANI ,  Alessandro GASPARINI ,  Alessandro BERTOLINI

IPC: H03K4/90 ,  H03K4/501 ,  H03K3/011 ,  H03K3/023

CPC classification number: H03K4/90 ,  H03K3/011 ,  H03K3/023 ,  H03K4/501

Abstract: An auto-tuned ramp generator and a method for generating a sawtooth signal are provided. In the method and apparatus, a sawtooth signal is compared to a first reference voltage and a second reference voltage. In response to determining that the sawtooth signal does not exceed the first reference voltage, the voltage level of the sawtooth signal is increased. In response to determining that the sawtooth signal exceeds the second reference voltage, the voltage level of the sawtooth signal is decreased. The voltage level the sawtooth signal is retained if the sawtooth signal remains between the first and second reference voltages.

公开(公告)号：US20180342993A1

公开(公告)日：2018-11-29

申请号：US15984942

申请日：2018-05-21

Applicant: STMicroelectronics S.r.l.

Inventor： Stefano RAMORINI ,  Alberto CATTANI ,  Germano NICOLLINI ,  Alessandro GASPARINI

IPC: H03F3/217 ,  H03F3/45

CPC classification number: H03F3/2173 ,  G01R1/30 ,  G01R19/0092 ,  H03F3/45273 ,  H03F2200/261 ,  H03F2200/393 ,  H03F2200/456 ,  H03F2200/462 ,  H03F2200/474 ,  H03F2200/477 ,  H03F2200/483

Abstract: A switching amplifier, such as a Class D amplifier, includes a current sensing circuit. The current sensing circuit is formed by replica loop circuits that are selectively coupled to corresponding output inverter stages of the switching amplifier. The replica loop circuits operated to produce respective replica currents of the output currents generated by the output inverter stages. A sensing circuitry is coupled to receive the replica currents from the replica loop circuits and operates to produce an output sensing signal as a function of the respective replica currents.

公开(公告)号：US20160079855A1

公开(公告)日：2016-03-17

申请号：US14749254

申请日：2015-06-24

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Stefano RAMORINI ,  Alessandro GASPARINI ,  Alberto CATTANI

IPC: H02M3/158 ,  H02J7/35

CPC classification number: H02M3/02 ,  H02J3/385 ,  H02J7/32 ,  H02J7/35 ,  H02M3/158 ,  Y02B10/14

Abstract: An electrical-energy harvesting system envisages a transducer for converting energy from an environmental energy source into a transduced signal, an electrical energy harvesting interface for receiving the transduced signal and for supplying a harvesting signal, and an energy storage element coupled to the electrical energy harvesting interface for receiving the harvesting signal. The electrical-energy harvesting system also includes a voltage converter connected to the electrical energy harvesting interface for generating a regulated voltage. The harvesting interface samples an open-circuit voltage value of the transduced signal, generates an optimized voltage value starting from the open-circuit voltage value, and generates an upper threshold voltage and a lower threshold voltage on the basis of the optimized voltage value. The harvesting interface controls the voltage converter in switching mode so that the harvesting signal has a value between the upper and lower threshold voltages in at least one operating condition.

Abstract translation: 电能收集系统设想用于将来自环境能源的能量转换成转换信号的换能器，用于接收转换信号并用于提供收获信号的电能收集界面，以及耦合到电能收集的能量存储元件 用于接收收获信号的接口。 电能收集系统还包括连接到电能收集界面的电压转换器，用于产生调节电压。 采集接口采样转换信号的开路电压值，从开路电压值开始产生优化的电压值，并根据优化电压值生成上阈值电压和下阈值电压。 采集接口以开关模式控制电压转换器，使得收集信号在至少一个操作条件下具有在上限和下限阈值电压之间的值。