SS41
Bipolar Hall-Effect Position Sensor
Features and Benefits Application Examples
4.5V to 24V Operation Brushless DC motor commutation
-40 to 150 Superior temperature operation Automotive, Consumer and Industrial
Bipolar technology Solid-state switch
Open-collector 25 mA output Speed measurement
Reverse battery protection Revolution counting
Small Size-SOT23 3L or SIP 3L Angular position detection
Solid-state reliability Proximity detection
Resistant to physical stress
Activate with small, commercially available
permanent magnets
3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA)
1 V2.00 May 1, 2012
SS41
Bipolar Hall-Effect Position Sensor
General Description
The SS41 is an integrated Hall effect latched sensor designed changes. If a magnetic flux density larger than threshold Bop,
for electronic commutation of brush-less DC motor Output is turned on (low). The output state is held until a
applications. The device integrates a voltage regulator, magnetic flux density reversal falls below Brp, causing
reverse battery protection diode, Hall sensor with dynamic Output to be turned off (high).
offset cancellation system, temperature compensation
circuitry, small signal amplifier, Schmitt trigger and an Thanks to its wide operating voltage range and extended
open-collector output to sink up to 25 mA. choice of temperature range, it is quite suitable for use in DC
motor applications.
These Hall-effect switches are monolithic integrated circuits
with tighter magnetic specifications, designed to operate The device is delivered in a Small Outline Transistor (SOT)
continuously over extended temperatures to +150,and are or in a Plastic Single In Line (SIP 3L flat). Both 3-lead
more stable with both temperature and supply voltage packages are RoHS compliant.
Glossary of Terms
MilliTesla (mT), Units of magnetic flux density: 1mT = 10 Gauss
RoHS Restriction of Hazardous Substances
Operating Point (B OP ) Magnetic flux density applied on the branded side of the package which turns the output
driver ON (V OUT = V DSon )
Release Point (B RP ) Magnetic flux density applied on the branded side of the package which turns the output
driver OFF (V OUT = high)
2 V2.00 May 1, 2012
SS41
Bipolar Hall-Effect Position Sensor
Pin Definitions and Descriptions
SOT Pin SIP Pin Name Type Function
1 1 VDD Supply Supply Voltage pin
2 3 OUT Output Open Drain Output pin
3 2 GND Ground Ground pin
Absolute Maximum Ratings
Parameter Symbol Value Units
Supply Voltage VDD 28 V
Supply Current IDD 50 mA
Output Voltage VOUT 28 V
Output Current IOUT 50 mA
Storage Temperature Range TS -65 to 170 C
Absolute maximum ratings
Operating Temperature Range Symbol Value Units
Temperature Suffix E TA -40 to 85 C
Temperature Suffix K TA -40 to 125 C
Temperature Suffix L TA -40 to 150 C
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated conditions for
extended periods may affect device reliability.
3 V2.00 May 1, 2012
SS41
Bipolar Hall-Effect Position Sensor
General Electrical Specifications
DC Operating Parameters T A = 25, V DD = 4.5V to 24V (unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Units
Supply Voltage VDD Operating 4.5 24 V
Supply Current IDD B < B RP 5 10 mA
Output Saturation Voltage VDSon IOUT = 20mA, B > B OP 0.4 0.5 V
IOFF B < B RP VOUT = 24V [PKU1]:
Output Leakage Current 0.01 5 A
Output Rise Time tr RL = 1K, CL = 20pF 0.3 1.5 s
Output Fall Time tf RL =1K, CL = 20pF 0.3 1.5 s
Magnetic Specifications
DC Operating Parameters VDD = 4.5V to 24V (unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Units
Operating Point B OP 5 37 70 G
Release Point B RP Ta=25,Vdd=5V DC -70 -37 -5 G
Hysteresis B HYS 75 G
Application Information
4 V2.00 May 1, 2012
SS41
Bipolar Hall-Effect Position Sensor
Package Information
Package F, 3-Pin SIP:
5 V2.00 May 1, 2012
SS41
Bipolar Hall-Effect Position Sensor
Package FT, 3-Pin SOT-23
Ordering Information
Part No. Pb-free Temperature Code Package Code Packing
SS41ESOT YES -40C to 85C SOT-23 7-in. reel, 3000 pieces/ reel
SS41EUA YES -40C to 85C TO-92 Bulk, 1000 pieces/ bag
SS41KSOT YES -40C to 125C SOT-23 7-in. reel, 3000 pieces/ reel
SS41KUA YES -40C to 125C TO-92 Bulk, 1000 pieces/ bag
SS41LSOT YES -40C to 150C SOT-23 7-in. reel, 3000 pieces/ reel
SS41LUA YES -40C to 150C TO-92 Bulk, 1000 pieces/ bag
6 V2.00 May 1, 2012
