-
公开(公告)号：US12088185B2
公开(公告)日：2024-09-10
申请号：US17366744
申请日：2021-07-02
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chen Huang , Qiang Xie , Liang Chen
CPC classification number: H02M1/0025 , H02M3/158 , H02M3/1586 , H02M1/0009
Abstract: In a voltage conversion circuit, a sampling signal and a triangular wave signal are synthesized into a first signal, and the first signal and a second signal are compared to output a pulse-width modulation (PWM) signal. A frequency of the PWM signal may be determined by a frequency of the triangular wave signal. Therefore, the frequency of the PWM signal is fixed using the frequency-fixed triangular wave signal. Turning on or switching off of a power transistor in a voltage conversion subcircuit is controlled according to the PWM signal to convert a received direct current input voltage into a direct current output voltage, thereby implementing a fixed operating frequency for the voltage conversion circuit.
-
公开(公告)号：US09209692B2
公开(公告)日：2015-12-08
申请号：US14053817
申请日：2013-10-15
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liang Chen , Qiang Xie
CPC classification number: H02M3/158
Abstract: The invention discloses a hysteretic control conversion circuit. The circuit includes a PMOS transistor and an NMOS transistor that are connected in series between a voltage input terminal and a ground terminal, a first voltage divider resistor string connected in series between a voltage output terminal and the ground terminal, a comparator, and a logic controller, where an output terminal of the comparator is connected to an input terminal of the logic controller, and two output terminals of the logic controller are respectively connected to grid electrodes of the PMOS transistor and the NMOS transistor. The hysteretic control conversion circuit also includes: a negative feedback module connected between the voltage output terminal and the input terminal of the comparator, and configured to perform negative feedback control over an output voltage of the hysteretic control conversion circuit and clamp the output voltage to a preset reference voltage.
Abstract translation: 本发明公开了一种迟滞控制转换电路。 电路包括串联连接在电压输入端和接地端之间的PMOS晶体管和NMOS晶体管，串联连接在电压输出端和接地端之间的第一分压电阻串，比较器和逻辑 控制器，其中比较器的输出端连接到逻辑控制器的输入端，逻辑控制器的两个输出端分别连接到PMOS晶体管和NMOS晶体管的栅电极。 迟滞控制转换电路还包括：负反馈模块，连接在电压输出端和比较器的输入端之间，并被配置为对迟滞控制转换电路的输出电压执行负反馈控制，并将输出电压钳位到 预设参考电压。
-
公开(公告)号：US10672757B2
公开(公告)日：2020-06-02
申请号：US16518373
申请日：2019-07-22
Applicant: Huawei Technologies Co., Ltd.
Inventor： Jiake Wang , Yue Chen , Qiang Xie
Abstract: A multiphase parallel digital current (DC) to DC converter (DCDC) circuit includes a loop operational amplifier (EA) unit, N output-stage circuit units, and M drive units, where a drive unit corresponds to at least one output-stage circuit unit including a comparator (COMP) and a power stage circuit, an output end of the loop operational amplifier EA unit is connected to an input end of the drive unit, an output end of the drive unit is connected to an input end of a COMP in a corresponding output-stage circuit unit, and an output end of the COMP is connected to an input end of a power stage circuit in the same output-stage circuit unit, and an input end of the loop operational amplifier EA unit is connected to output ends of all the power stage circuits.
-
公开(公告)号：US10523104B2
公开(公告)日：2019-12-31
申请号：US16434603
申请日：2019-06-07
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xinyu Wang , Qiang Xie , Liang Chen
Abstract: A direct current-direct current (DC-DC) converter includes an upper transistor, a lower transistor, a first bias circuit and a second bias circuit. A first input end of the first bias circuit is coupled to a first voltage reference, a second input end of the first bias circuit is coupled to a power source (PVDD), and an output end of the first bias circuit is coupled to a gate of the upper transistor to provide a first bias voltage for the gate of the upper transistor. A first input end of the second bias circuit is coupled to a second voltage reference, a second input end of the second bias circuit is coupled to a power ground (PGND), and an output end of the second bias circuit is coupled to a gate of the lower transistor to provide a second bias voltage for the gate of the lower transistor.
-
公开(公告)号：US20210336524A1
公开(公告)日：2021-10-28
申请号：US17366744
申请日：2021-07-02
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chen Huang , Qiang Xie , Liang Chen
Abstract: In a voltage conversion circuit, a sampling signal and a triangular wave signal are synthesized into a first signal, and the first signal and a second signal are compared to output a pulse-width modulation (PWM) signal. A frequency of the PWM signal may be determined by a frequency of the triangular wave signal. Therefore, the frequency of the PWM signal is fixed using the frequency-fixed triangular wave signal. Turning on or switching off of a power transistor in a voltage conversion subcircuit is controlled according to the PWM signal to convert a received direct current input voltage into a direct current output voltage, thereby implementing a fixed operating frequency for the voltage conversion circuit.
-
Patent Agency Ranking
公开(公告)号：US09641060B2
公开(公告)日：2017-05-02
申请号：US14717775
申请日：2015-05-20
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: H02M1/00 , H02M3/156 , H02M2001/0009 , H02M2001/0025
Abstract: A switching mode power supply, including a drive circuit, a low-pass filter, a feedback circuit, an operational amplifier, a reference voltage signal generation circuit, a comparator, a pulse width modulation (PWM) signal generation circuit, and a duty cycle detection circuit, where the duty cycle detection circuit is configured to convert a PWM signal that is output by the PWM signal generation circuit or a pulse output voltage signal that is output by the drive circuit into a triangular wave signal, and input the triangular wave signal to a negative input end of the comparator. The present invention is used to avoid using a complex collection circuit to collect a signal from an inductor, thereby reducing complexity of the switching mode power supply, decreasing a current collection time, and improving an operating frequency.
-
公开(公告)号：US20150340942A1
公开(公告)日：2015-11-26
申请号：US14717775
申请日：2015-05-20
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: H02M1/00 , H02M3/156 , H02M2001/0009 , H02M2001/0025
Abstract: A switching mode power supply, including a drive circuit, a low-pass filter, a feedback circuit, an operational amplifier, a reference voltage signal generation circuit, a comparator, a pulse width modulation (PWM) signal generation circuit, and a duty cycle detection circuit, where the duty cycle detection circuit is configured to convert a PWM signal that is output by the PWM signal generation circuit or a pulse output voltage signal that is output by the drive circuit into a triangular wave signal, and input the triangular wave signal to a negative input end of the comparator. The present invention is used to avoid using a complex collection circuit to collect a signal from an inductor, thereby reducing complexity of the switching mode power supply, decreasing a current collection time, and improving an operating frequency.
Abstract translation: 开关模式电源，包括驱动电路，低通滤波器，反馈电路，运算放大器，参考电压信号生成电路，比较器，脉宽调制（PWM）信号产生电路和占空比 检测电路，其中占空比检测电路被配置为将由PWM信号产生电路输出的PWM信号或由驱动电路输出的脉冲输出电压信号转换为三角波信号，并输入三角波信号 到比较器的负输入端。 本发明用于避免使用复合采集电路来收集来自电感器的信号，从而降低开关模式电源的复杂性，减小当前采集时间并提高工作频率。
-
公开(公告)号：US20240305200A1
公开(公告)日：2024-09-12
申请号：US18667335
申请日：2024-05-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wenlin Zhang , Yue Chen , Yi Wang , Qiang Xie
Abstract: A switching power supply circuit includes a power transistor circuit, including a plurality of power transistors coupled in series between a power supply end and a ground, where a first electrode of a first power transistor in the plurality of power transistors is coupled to the power supply end by using a second power transistor in the plurality of power transistors, and a second electrode of the first power transistor is coupled to the ground by using a third power transistor in the plurality of power transistors; a drive circuit, configured to drive the second power transistor and the third power transistor; and a first transistor, where both a gate and a first electrode of the first transistor are coupled to a gate of the third power transistor, and a second electrode of the first transistor is coupled to the ground by using a first switch.
-
公开(公告)号：US09312763B2
公开(公告)日：2016-04-12
申请号：US14257627
申请日：2014-04-21
Applicant: Huawei Technologies Co., Ltd.
Inventor： Qiang Xie , Liang Chen
CPC classification number: H02M3/156 , H02M2001/0025
Abstract: The present invention is applicable to the field of direct current conversion, and provides a DC-DC converter. In the present invention, a DC-DC converter including a triangular wave generation module and a switch control module is adopted. The triangular wave generation module generates a triangular wave signal according to voltages at both ends of an energy storage inductor L1, and the switch control module outputs a control level according to its internally generated clock signal and the triangular wave signal to control a switching operation of a PMOS power tube and an NMOS power tube according to a preset switching frequency.
Abstract translation: 本发明可应用于直流转换领域，并提供一种DC-DC转换器。 在本发明中，采用包括三角波产生模块和开关控制模块的DC-DC转换器。 三角波产生模块根据能量存储电感器L1两端的电压产生三角波信号，并且开关控制模块根据其内部产生的时钟信号和三角波信号输出控制电平，以控制开关操作 PMOS功率管和NMOS功率管，根据预设的开关频率。
-
公开(公告)号：US20140035544A1
公开(公告)日：2014-02-06
申请号：US14053817
申请日：2013-10-15
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liang Chen , Qiang Xie
IPC: H02M3/158
CPC classification number: H02M3/158
Abstract: The invention discloses a hysteretic control conversion circuit. The circuit includes a PMOS transistor and an NMOS transistor that are connected in series between a voltage input terminal and a ground terminal, a first voltage divider resistor string connected in series between a voltage output terminal and the ground terminal, a comparator, and a logic controller, where an output terminal of the comparator is connected to an input terminal of the logic controller, and two output terminals of the logic controller are respectively connected to grid electrodes of the PMOS transistor and the NMOS transistor. The hysteretic control conversion circuit also includes: a negative feedback module connected between the voltage output terminal and the input terminal of the comparator, and configured to perform negative feedback control over an output voltage of the hysteretic control conversion circuit and clamp the output voltage to a preset reference voltage.
Abstract translation: 本发明公开了一种迟滞控制转换电路。 电路包括串联连接在电压输入端和接地端之间的PMOS晶体管和NMOS晶体管，串联连接在电压输出端和接地端之间的第一分压电阻串，比较器和逻辑 控制器，其中比较器的输出端连接到逻辑控制器的输入端，逻辑控制器的两个输出端分别连接到PMOS晶体管和NMOS晶体管的栅电极。 迟滞控制转换电路还包括：负反馈模块，连接在电压输出端和比较器的输入端之间，并被配置为对迟滞控制转换电路的输出电压执行负反馈控制，并将输出电压钳位到 预设参考电压。
-
-
-
-
-
-
-
-
-
Search Results
12
records
(took 0.016 seconds)
