公开(公告)号：US09791883B2

公开(公告)日：2017-10-17

申请号：US15218605

申请日：2016-07-25

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Xue Lian Zhou

IPC: G05F3/26 ,  H02M1/08 ,  H02M3/158 ,  H02M1/00

CPC classification number: G05F3/262 ,  H02M1/08 ,  H02M3/158 ,  H02M2001/0032 ,  Y02B70/16

Abstract: An electronic device disclosed herein includes a current comparator to generate an output current based upon a difference between a current flowing in an output branch and a current flowing in an input branch. A pair of transistors is coupled to an output of the current comparator. A first amplifier has inputs coupled to the pair of transistors and to a reference voltage, the first amplifier being configured to subtract the reference voltage from a voltage across the pair of transistors and output a difference voltage. A second amplifier has inputs coupled to the difference voltage and to the reference voltage, the second amplifier being configured to subtract the difference voltage from the reference voltage and output a pulse skipping mode reference signal.

公开(公告)号：US20170146571A1

公开(公告)日：2017-05-25

申请号：US14955207

申请日：2015-12-01

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Xue Lian Zhou

IPC: G01R15/18

CPC classification number: G01R15/18 ,  G01R15/16 ,  G01R19/16538

Abstract: Current flowing through an inductor in response to a pulse width modulation (PWM) control signal is sensed to generate a sensed current. The sensed current is processed over one or more PWM cycles of the PWM control signal to generate an output signal indicative of average inductor current. This processing may include charging and discharging a capacitor at different rates dependent on the sense current, with the detection of capacitor discharge triggering a sampling of a voltage dependent on the sensed current that is indicative of average inductor current. The processing may include using the sensed to current to generate a first charge voltage associated with minimum inductor current and a second charge voltage associated with maximum inductor current, and then averaging the first and second charge voltages to generate an output signal indicative of average inductor current.

公开(公告)号：US09653990B1

公开(公告)日：2017-05-16

申请号：US14955116

申请日：2015-12-01

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Xue Lian Zhou

IPC: H02M3/07

CPC classification number: H02M3/07 ,  H02M2003/071

Abstract: A charge pump circuit is coupled between a positive supply node and a ground node. The charge pump circuit operates in response to clock signals output from a clock generator to produce a negative voltage at a negative voltage output node. A soft-start circuit for the charge pump circuit includes a comparison circuit configured to compare a varying intermediate voltage sensed between a rising supply voltage and the negative voltage to a ramp voltage during a start-up period of the charge pump circuit. The clock generator is selectively enabled to generate the clock signals in response to the comparison to provide for pulse-skipping.

公开(公告)号：US20160334828A1

公开(公告)日：2016-11-17

申请号：US15218605

申请日：2016-07-25

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Xue Lian Zhou

IPC: G05F3/26 ,  H02M1/08

CPC classification number: G05F3/262 ,  H02M1/08 ,  H02M3/158 ,  H02M2001/0032 ,  Y02B70/16

Abstract: An electronic device disclosed herein includes a current comparator to generate an output current based upon a difference between a current flowing in an output branch and a current flowing in an input branch. A pair of transistors is coupled to an output of the current comparator. A first amplifier has inputs coupled to the pair of transistors and to a reference voltage, the first amplifier being configured to subtract the reference voltage from a voltage across the pair of transistors and output a difference voltage. A second amplifier has inputs coupled to the difference voltage and to the reference voltage, the second amplifier being configured to subtract the difference voltage from the reference voltage and output a pulse skipping mode reference signal.

Abstract translation: 本文公开的电子设备包括电流比较器，用于基于在输出分支中流动的电流与在输入分支中流动的电流之间的差产生输出电流。 一对晶体管耦合到电流比较器的输出端。 第一放大器具有耦合到所述一对晶体管和参考电压的输入，所述第一放大器被配置为从所述一对晶体管上的电压中减去所述参考电压并输出差分电压。 第二放大器具有耦合到差分电压和参考电压的输入，第二放大器被配置为从参考电压中减去差分电压并输出脉冲跳跃模式参考信号。

公开(公告)号：US20160103463A1

公开(公告)日：2016-04-14

申请号：US14531314

申请日：2014-11-03

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Xue Lian Zhou

IPC: G05F3/26

CPC classification number: G05F3/262 ,  H02M1/08 ,  H02M3/158 ,  H02M2001/0032 ,  Y02B70/16

Abstract: An electronic device may include a switching converter configured to convert an input voltage to an output voltage, and being selectively operable in a pulse skipping mode based upon a control signal. The switching converter may include a comparator having a first input configured to receive an error signal, a second input configured to receive a skipping mode reference signal, and an output configured to generate the control signal. A reference generator may be configured to generate the skipping mode reference signal as a function of a difference between the output voltage and the input voltage.

Abstract translation: 电子设备可以包括被配置为将输入电压转换为输出电压并且可以基于控制信号以脉冲跳过模式选择性地操作的开关转换器。 开关转换器可以包括具有被配置为接收错误信号的第一输入的比较器，被配置为接收跳过模式参考信号的第二输入和被配置为产生控制信号的输出。 参考发生器可以被配置为根据输出电压和输入电压之间的差产生跳跃模式参考信号。

公开(公告)号：US20160062384A1

公开(公告)日：2016-03-03

申请号：US14504494

申请日：2014-10-02

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Xue Lian Zhou

IPC: G05F3/26 ,  H05B33/08

CPC classification number: G05F3/262 ,  H03M1/745 ,  H05B33/0809 ,  H05B33/0815

Abstract: A current source circuit is configured to receive a reference current at the input circuit path of a current mirror circuit. The current mirror circuit mirrors the reference current and generates mirror currents at a number of output circuit paths. A corresponding number of control transistors are connected in series with the output circuit paths. Each control transistor is selectively actuated in response to a control signal. A decoder circuit is configured to receive a variable control signal and generate actuation signals in response thereto to selective actuate the control transistors to pass the mirror current to an output node. At the output node, the passed mirror currents are summed to generate a variable output current. The variable current is monotonically modulated in response to the variable control signal.

Abstract translation: 电流源电路被配置为在电流镜电路的输入电路路径处接收参考电流。 电流镜电路反映参考电流并在多个输出电路路径上产生镜像电流。 相应数量的控制晶体管与输出电路路径串联连接。 每个控制晶体管响应于控制信号被选择性地致动。 解码器电路被配置为接收可变控制信号并响应于此产生致动信号以选择性地致动控制晶体管以将镜电流传递到输出节点。 在输出节点，将通过的镜像电流相加以产生可变输出电流。 可变电流响应于可变控制信号被单调调制。

公开(公告)号：US20130169610A1

公开(公告)日：2013-07-04

申请号：US13648826

申请日：2012-10-10

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Tao Tao Huang ,  Meng Wang

IPC: G09G5/00 ,  H03K3/00

CPC classification number: G09G3/36 ,  G09G3/3696

Abstract: A driving circuit includes a controller, a converter and a feedback module. The controller receives an input supply at a supply node, and generates a control signal according to the input supply. The converter receive an input signal at an input node and a control signal at a control node, and is configured to convert the input signal to a driving signal in response to the control signal. The driving signal of the converter is feedback by the feedback module to the controller. The input supply is generated from the input signal or the feedback driving signal. The drive circuit may drive a display device.

Abstract translation: 驱动电路包括控制器，转换器和反馈模块。 控制器在供电节点处接收输入电源，并根据输入电源产生控制信号。 转换器在输入节点处接收输入信号并在控制节点接收控制信号，并且被配置为响应于控制信号将输入信号转换成驱动信号。 转换器的驱动信号由反馈模块反馈给控制器。 输入电源由输入信号或反馈驱动信号产生。 驱动电路可以驱动显示装置。

公开(公告)号：US09672762B2

公开(公告)日：2017-06-06

申请号：US14818924

申请日：2015-08-05

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Tao Tao Huang

IPC: H03K3/00 ,  G09G3/20 ,  H02M3/158 ,  H03K17/687 ,  H03K17/0412 ,  G09G3/3208

CPC classification number: G09G3/3225 ,  G09G3/20 ,  G09G3/3208 ,  G09G3/3648 ,  G09G2300/0842 ,  G09G2310/0259 ,  G09G2310/0291 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2330/02 ,  G09G2330/025 ,  G09G2330/028 ,  H02M3/158 ,  H03K5/12 ,  H03K17/04123 ,  H03K17/687 ,  H03K2217/0063 ,  H03K2217/0072

Abstract: A low side driver includes a first transistor coupled in series with a second transistor at a low side voltage node for a load. A capacitance is configured to store a voltage and a voltage buffer circuit has an input coupled to receive the voltage stored by the capacitance and an output coupled to drive a control node of the second transistor with the stored voltage. A current source supplies current through a switch to the capacitance and the input of the voltage buffer circuit. The switch is configured to be actuated by an oscillating enable signal so as to cyclically source current from the current source to the capacitance and cause a stepped increase in the stored voltage which is applied by the buffer circuit to the control node of the second transistor.

公开(公告)号：US10186193B2

公开(公告)日：2019-01-22

申请号：US15585677

申请日：2017-05-03

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Tao Tao Huang

IPC: H03K3/00 ,  G09G3/3225 ,  H02M3/158 ,  G09G3/20 ,  H03K17/687 ,  H03K17/0412 ,  G09G3/36 ,  H03K5/12 ,  G09G3/3208

Abstract: A low side driver includes a first transistor coupled in series with a second transistor at a low side voltage node for a load. A capacitance is configured to store a voltage and a voltage buffer circuit has an input coupled to receive the voltage stored by the capacitance and an output coupled to drive a control node of the second transistor with the stored voltage. A current source supplies current through a switch to the capacitance and the input of the voltage buffer circuit. The switch is configured to be actuated by an oscillating enable signal so as to cyclically source current from the current source to the capacitance and cause a stepped increase in the stored voltage which is applied by the buffer circuit to the control node of the second transistor.

公开(公告)号：US09857395B2

公开(公告)日：2018-01-02

申请号：US14955207

申请日：2015-12-01

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Xue Lian Zhou

IPC: G01R15/18 ,  G01R15/16 ,  G01R19/165

CPC classification number: G01R15/18 ,  G01R15/16 ,  G01R19/16538

Abstract: Current flowing through an inductor in response to a pulse width modulation (PWM) control signal is sensed to generate a sensed current. The sensed current is processed over one or more PWM cycles of the PWM control signal to generate an output signal indicative of average inductor current. This processing may include charging and discharging a capacitor at different rates dependent on the sense current, with the detection of capacitor discharge triggering a sampling of a voltage dependent on the sensed current that is indicative of average inductor current. The processing may include using the sensed to current to generate a first charge voltage associated with minimum inductor current and a second charge voltage associated with maximum inductor current, and then averaging the first and second charge voltages to generate an output signal indicative of average inductor current.