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公开(公告)号：US09628006B2
公开(公告)日：2017-04-18
申请号：US14613937
申请日：2015-02-04
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Hernandez , Gregory Charles Amidon , David John Baldwin , Brandon J. Beckham
IPC: H02P7/00
CPC classification number: H02P7/0094
Abstract: An apparatus includes a motor driver configured to drive a motor across a pair of input terminals to the motor and a current sense unit configured to sense the motor's electrical current amplitude. Further, an angular frequency extractor is operatively coupled to the motor driver and the current sense unit and configured to detect discontinuities in the motor's electrical current amplitude. The angular frequency extractor also is configured to determine a time period for one complete revolution of a rotor of the motor and to generate a feedback signal based on the determined period to control an angular frequency of the motor. The feedback signal may be used to adjust how the motor is being driven (e.g., to slow the motor down or speed it up).
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公开(公告)号：US09584115B2
公开(公告)日：2017-02-28
申请号：US14741208
申请日：2015-06-16
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Justin Patrick Vogt , Susan Ann Curtis , David John Baldwin
CPC classification number: H03K17/687 , H02M1/08 , H02M3/07 , H02M2001/0048 , Y02B70/1491
Abstract: A switch includes a power transistor configured to switch an input voltage to a load. The switch further includes a charge pump and a duty cycle controller. The charge pump is coupled to the power transistor and includes an enable input to cause the charge pump to be turned on and off. The duty cycle controller is coupled to the charge pump and is configured to duty cycle the charge pump based on a comparison of a signal of a gate of the power transistor to a reference signal.
Abstract translation: 开关包括被配置为将输入电压切换到负载的功率晶体管。 开关还包括电荷泵和占空比控制器。 电荷泵耦合到功率晶体管，并且包括使能电荷泵接通和断开的使能输入。 占空比控制器耦合到电荷泵，并且被配置为基于功率晶体管的栅极信号与参考信号的比较来对电荷泵进行占空比。
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