公开(公告)号：US20160249423A1

公开(公告)日：2016-08-25

申请号：US15147575

申请日：2016-05-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dongqi Huang ,  Xiao Yu ,  Hui Li

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0827 ,  H05B33/0845 ,  Y02B20/42

Abstract: A WLED driver and a drive control method. The WLED driver includes 2N2 switches, and each CS module includes 2N switches, where one end of each of N switches in the 2N switches is connected to an output end of an error amplifier, another end of each of the N switches is connected to a gate of each of N NMOS transistors, one end of each of remaining N switches is connected to a negative input end of the error amplifier, and another end of each of the remaining N switches is connected to a positive input end of each of N feedback resistors. After a control circuit generates a clock control signal group Φgroup. the control circuit controls switching actions of the 2N2 switches on a time-division basis according to the clock control signal group Φgroup.

Abstract translation: WLED驱动程序和驱动器控制方法。 WLED驱动器包括2N2个开关，每个CS模块包括2N个开关，其中2N个开关中的N个开关中的每一个的一端连接到误差放大器的输出端，每个N个开关的另一端连接到 每个N个NMOS晶体管的栅极，其余N个开关中的每一个的一端连接到误差放大器的负输入端，并且其余N个开关中的每一个的另一端连接到每个N个反馈的正输入端 电阻 控制电路产生时钟控制信号组Φgroup。 控制电路根据时钟控制信号组Φgroup，以时分的形式控制2N2个开关的切换动作。

公开(公告)号：US09622305B2

公开(公告)日：2017-04-11

申请号：US15147575

申请日：2016-05-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dongqi Huang ,  Xiao Yu ,  Hui Li

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0827 ,  H05B33/0845 ,  Y02B20/42

Abstract: A WLED driver and a drive control method. The WLED driver includes 2N2 switches, and each CS module includes 2N switches, where one end of each of N switches in the 2N switches is connected to an output end of an error amplifier, another end of each of the N switches is connected to a gate of each of N NMOS transistors, one end of each of remaining N switches is connected to a negative input end of the error amplifier, and another end of each of the remaining N switches is connected to a positive input end of each of N feedback resistors. After a control circuit generates a clock control signal group Φgroup. the control circuit controls switching actions of the 2N2 switches on a time-division basis according to the clock control signal group Φgroup.

公开(公告)号：US20200091823A1

公开(公告)日：2020-03-19

申请号：US16692381

申请日：2019-11-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dongqi Huang ,  Shaoqing Dong

IPC: H02M3/158

Abstract: In a current equalization circuit, where a first inductor is connected to a first resistor, a second inductor is connected to both the first inductor and a second resistor, the input end of the first resistor and the input end of the second resistor are respectively connected to a first input end and a second input end of an error detection sub-circuit, a first output end of the error detection sub-circuit is connected to a first error adjustment sub-circuit, a second output end of the error detection sub-circuit is connected to a second error adjustment sub-circuit, the first error adjustment sub-circuit adjusts an input current of the first inductor based on a voltage signal from the error detection sub-circuit, and the second error adjustment sub-circuit adjusts an input current of the second inductor based on a voltage signal from the error detection sub-circuit.

公开(公告)号：US11095224B2

公开(公告)日：2021-08-17

申请号：US16692381

申请日：2019-11-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dongqi Huang ,  Shaoqing Dong

IPC: H02M3/158

Abstract: In a current equalization circuit, where a first inductor is connected to a first resistor, a second inductor is connected to both the first inductor and a second resistor, the input end of the first resistor and the input end of the second resistor are respectively connected to a first input end and a second input end of an error detection sub-circuit, a first output end of the error detection sub-circuit is connected to a first error adjustment sub-circuit, a second output end of the error detection sub-circuit is connected to a second error adjustment sub-circuit, the first error adjustment sub-circuit adjusts an input current of the first inductor based on a voltage signal from the error detection sub-circuit, and the second error adjustment sub-circuit adjusts an input current of the second inductor based on a voltage signal from the error detection sub-circuit.