公开(公告)号：US20170149328A1

公开(公告)日：2017-05-25

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：US09423816B2

公开(公告)日：2016-08-23

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：US20130313993A1

公开(公告)日：2013-11-28

申请号：US13888843

申请日：2013-05-07

Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD.

Inventor： Meng Wang ,  Tao Tao Huang

IPC: H03K5/12

CPC classification number: H03K5/12

Abstract: A drive circuit includes a first transistor coupled in series with a second transistor at a first intermediate node coupled to a load. An amplifier has an output driving a control terminal of the second transistor. The amplifier includes a first input coupled to a second intermediate node and a second input coupled to a reference voltage. A feedback circuit is coupled between the first intermediate node and the second intermediate node. A slope control circuit is coupled the second intermediate node. The slope control circuit injects a selected value of current into the second intermediate node, that current operating to control the output of the amplifier in setting a slope for change in voltage at the first intermediate node.

Abstract translation: 驱动电路包括与耦合到负载的第一中间节点与第二晶体管串联耦合的第一晶体管。 放大器具有驱动第二晶体管的控制端的输出。 放大器包括耦合到第二中间节点的第一输入和耦合到参考电压的第二输入。 反馈电路耦合在第一中间节点和第二中间节点之间。 斜坡控制电路耦合第二中间节点。 斜坡控制电路将选择的电流值注入到第二中间节点中，该电流在设定第一中间节点处电压变化的斜率时控制放大器的输出。

公开(公告)号：US20170236468A1

公开(公告)日：2017-08-17

申请号：US15585677

申请日：2017-05-03

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

Inventor： Meng Wang ,  Tao Tao Huang

IPC: G09G3/3225 ,  H03K5/12 ,  H03K17/687 ,  G09G3/36

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：US09236854B2

公开(公告)日：2016-01-12

申请号：US13888843

申请日：2013-05-07

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

Inventor： Meng Wang ,  Tao Tao Huang

IPC: H05B37/02 ,  H03K5/12

CPC classification number: H03K5/12

Abstract: A drive circuit includes a first transistor coupled in series with a second transistor at a first intermediate node coupled to a load. An amplifier has an output driving a control terminal of the second transistor. The amplifier includes a first input coupled to a second intermediate node and a second input coupled to a reference voltage. A feedback circuit is coupled between the first intermediate node and the second intermediate node. A slope control circuit is coupled the second intermediate node. The slope control circuit injects a selected value of current into the second intermediate node, that current operating to control the output of the amplifier in setting a slope for change in voltage at the first intermediate node.

Abstract translation: 驱动电路包括与耦合到负载的第一中间节点与第二晶体管串联耦合的第一晶体管。 放大器具有驱动第二晶体管的控制端的输出。 放大器包括耦合到第二中间节点的第一输入和耦合到参考电压的第二输入。 反馈电路耦合在第一中间节点和第二中间节点之间。 斜坡控制电路耦合第二中间节点。 斜坡控制电路将选择的电流值注入到第二中间节点中，该电流在设定第一中间节点处电压变化的斜率时控制放大器的输出。

公开(公告)号：US20150339963A1

公开(公告)日：2015-11-26

申请号：US14818924

申请日：2015-08-05

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

Inventor： Meng Wang ,  Tao Tao Huang

IPC: G09G3/20 ,  H03K17/687

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.

Abstract translation: 低侧驱动器包括与用于负载的低侧电压节点与第二晶体管串联耦合的第一晶体管。 电容被配置为存储电压，并且电压缓冲器电路具有耦合以接收由电容存储的电压的输入和耦合以用所存储的电压驱动第二晶体管的控制节点的输出。 电流源通过开关将电流提供给电容和电压缓冲电路的输入。 该开关被配置为由振荡使能信号激励，以便将来自电流源的电流循环地引导到电容，并且使由缓冲电路施加到第二晶体管的控制节点的存储电压发生阶梯式增加。

公开(公告)号：US09136762B2

公开(公告)日：2015-09-15

申请号：US13875651

申请日：2013-05-02

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

Inventor： Meng Wang ,  Tao Tao Huang

IPC: H05B37/02 ,  H02M3/158 ,  H03K17/0412 ,  G09G3/32

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.

Abstract translation: 低侧驱动器包括与用于负载的低侧电压节点与第二晶体管串联耦合的第一晶体管。 电容被配置为存储电压，并且电压缓冲器电路具有耦合以接收由电容存储的电压的输入和耦合以用所存储的电压驱动第二晶体管的控制节点的输出。 电流源通过开关将电流提供给电容和电压缓冲电路的输入。 该开关被配置为由振荡使能信号激励，以便将来自电流源的电流循环地引导到电容，并且使由缓冲电路施加到第二晶体管的控制节点的存储电压发生阶梯式增加。

公开(公告)号：US08907705B2

公开(公告)日：2014-12-09

申请号：US13648557

申请日：2012-10-10

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

Inventor： Tao Tao Huang ,  Meng Wang

IPC: H03K4/02 ,  H03K4/06

CPC classification number: H03K4/502

Abstract: A fully integrated ramp generator circuit includes a first current generator that sources current to first capacitor through a first transistor that is gate controlled by the complement of a periodic signal. The ramping voltage stored on the first capacitor is buffered to an output node as a ramp output signal. A second transistor couples the output node to the first current generator and is gate controlled by the periodic signal. The periodic signal is generated at the output of a flip-flop that receives an input clock signal and reset signal. The reset signal is generated by a comparator circuit operable to compare the voltage on a second capacitor to a reference. The second capacitor is charged by a second current source and discharged by a third transistor that is gate controlled by the periodic signal.

Abstract translation: 完全集成的斜坡发生器电路包括第一电流发生器，其通过由周期信号的补码门控制的第一晶体管向第一电容器供电。 存储在第一电容器上的斜坡电压作为斜坡输出信号被缓冲到输出节点。 第二晶体管将输出节点耦合到第一电流发生器，并由周期信号进行栅极控制。 周期性信号在接收输入时钟信号和复位信号的触发器的输出端产生。 复位信号由比较器电路产生，比较器电路可操作以将第二电容器上的电压与参考电压进行比较。 第二电容器由第二电流源充电，并由被周期信号门控制的第三晶体管放电。

公开(公告)号：US20130300394A1

公开(公告)日：2013-11-14

申请号：US13875651

申请日：2013-05-02

Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD.

Inventor： Meng Wang ,  Tao Tao Huang

IPC: H02M3/158

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.

Abstract translation: 低侧驱动器包括与用于负载的低侧电压节点与第二晶体管串联耦合的第一晶体管。 电容被配置为存储电压，并且电压缓冲器电路具有耦合以接收由电容存储的电压的输入和耦合以用所存储的电压驱动第二晶体管的控制节点的输出。 电流源通过开关将电流提供给电容和电压缓冲电路的输入。 该开关被配置为由振荡使能信号激励，以便将来自电流源的电流循环地引导到电容，并且使由缓冲电路施加到第二晶体管的控制节点的存储电压发生阶梯式增加。

公开(公告)号：US10101762B2

公开(公告)日：2018-10-16

申请号：US15702917

申请日：2017-09-13

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

Inventor： Meng Wang ,  Xue Lian Zhou

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

Abstract: An electronic device 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.