Unipolar Hall Effect Switch
For NPole Induction
Ver12 1 July2015
Features
 Hall effect Switch Sensor
 Wide operating voltage
range 35V~35V
 Open Collector PreDriver
 Maximum output sink current 50mA
 Operating Temperature40℃~+125℃
 Package：SOT233L
 Npole induction
Applications
 Rotor Position Sensing
 Current Switch
 Brushless DC Motor
 Revolution counting
 Encoder
 RPM Detection
 Brushless DC Fan
 Speed measurement
General Description
The HE3141MR series is an integrated Hall Effect
position sensor designed for electronic
commutation of brushless DC motor applications
The device includes an onchip Hall voltage
generator for magnetic sensing a comparator that
amplifiers the Hall voltage and a Schmitt to
provide switching hysteresis for noise rejection
and opencollector output An internal band gap
regulator is used to provide temperature
compensated supply voltage for internal circuits
and allows a wide operating supply range
In the absence of a magnetic field the output
pin is OFF (High) A north pole of sufficient
strength will turn the output ON(Low) While the
magnetic flux density (B) is larger than threshold
Bop the output is ON If B removed toward Brp
the output pin is latched ONstate prior to BWhen BBlock Diagram
HE3141MRHE3141MR
Unipolar Hall Effect Switch
For NPole Induction
Ver12 2 July2015
Pin Assignment
Pin Descripiton
Absolute Maximum Ratings
Symbol Parameter Parameter Values Unit
VCC Supply Voltage 05~38 V
B Magnetic Induction 限 Gauss
IOL Low Level Output Current 50 m A
PD Maximum Power Dissipation 450 m W
TA Operating Temperature 40~+125 ℃
TS Storage Temperature 65~+150 ℃
Note These are stress ratings only Stresses exceeding the range specified under Absolute Maximum
Ratings may cause substantial damage to the device Functional operation of this device at other
conditions beyond those listed in the specification is not implied and prolonged exposure to extreme
conditions may affect device reliability HE3141MR
Unipolar Hall Effect Switch
For NPole Induction
Ver12 3 July2015
Electrical Characteristics
VCC5VTa25℃unless otherwise specified
Symbol Parameter Test Conditions Min Typ Max Unit
VCC Supply Voltage 38 35 V
VOL
Low Level Output
Voltage
IOUT25mA BIOUT40mA BIOH
High Level Output
Current
VOUT30V B> Brp 01 10 u A
ICC Source Current The Output Circuit 35 90 m A
Tr Output Rise Time RL820Ω CL20PF 02 u S
Tf Output Fall Time RL820Ω CL20PF 05 u S
Magnetic Figures
VCC5VTa25℃unless otherwise specified
Characteristics Symbol Low Limit Typ Upper Limit Unit
Working Point Bop 60 185 Gauss
Release Point Brp 15 Gauss
Hysteresis Bhys 20 35 60 Gauss
Application Circuits HE3141MR
Unipolar Hall Effect Switch
For NPole Induction
Ver12 4 July2015
Package Information

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