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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。
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公开(公告)号：US10706942B2
公开(公告)日：2020-07-07
申请号：US16146946
申请日：2018-09-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Abstract: A backup power circuit is provided. The backup power circuit includes a backup power branch array that includes N backup power branches that are coupled in parallel; and each backup power branch include a capacitor component and a unilateral conductive element, where the unilateral conductive element is configured to cut off a current path between capacitor components in the N backup power branches that are coupled in parallel, so that when some backup power branches are short-circuited, it can be ensured that backup power functions of other backup power branches are not affected, and backup power effects of the backup power branches are improved.
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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
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.
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