公开(公告)号：US10088533B2

公开(公告)日：2018-10-02

申请号：US14993495

申请日：2016-01-12

Applicant: Allegro Microsystems, LLC

Inventor： Manuel Rivas ,  Gerardo A. Monreal ,  Christine M. Graham ,  Eric G. Shoemaker

IPC: B60Q3/80 ,  G01R33/06 ,  G01R33/07 ,  G06F3/046 ,  G01R33/00 ,  G05F3/08 ,  H05B33/08 ,  B60Q3/20 ,  B60Q3/30

Abstract: An integrated magnetic field sensor includes a magnetic field sensing circuit and a power driving circuit disposed upon or within a common substrate. A method of powering on and off a load uses the above integrated magnetic field sensor.

公开(公告)号：US20180168014A1

公开(公告)日：2018-06-14

申请号：US15378702

申请日：2016-12-14

Applicant: Allegro MicroSystems, LLC

Inventor： Manuel Rivas ,  Gerardo A. Monreal

IPC: H05B33/08 ,  H05B37/02 ,  G01D5/14 ,  G01R33/07 ,  G01R33/09

CPC classification number: H05B33/0854 ,  G01D5/145 ,  G01D7/00 ,  G01P13/04 ,  G01R33/077 ,  G01R33/093 ,  G01R33/098 ,  H05B33/0845 ,  H05B37/0227

Abstract: In one aspect, an integrated circuit (IC) includes a first magnetic field sensor configured to sense a ring magnet, a second magnetic field sensor configured to sense the ring magnet and processing circuitry configured to receive a first signal from the first magnetic field sensor and to receive a second signal from the second magnetic field sensor. The processing circuitry is further configured to control an on/off state of at least one light emitting diode (LED) and brightness of the LED based on movement and position of the ring magnet with respect to the first and second magnetic field sensors.