AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
AH3761 Rev. 1 1 of 9 SEPTEMBER 2009
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• 3V to 28V DC operation voltage
• Chopper stabilized
• Wide operating voltage range
• Built-in power reverse protection
• Built-in voltage overshoot protection
• Output short circuit protection
• Open drain pre-driver
• SIP3 and SC59 (Commonly known as SOT23 in Asia)
: Available in “Green” Molding Compound (No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
AH3761 is an integrated Hall effect latched sensor designed for
electronic commutation of brush-less DC motor applications. The
device includes an on-chip Hall voltage generator for magnetic
sensing, a comparator that amplifies the Hall voltage, and a
schmitt trigger to provide switching hysteresis for noise rejection,
and open drain output. An internal bandgap regulator is used to
provide temperature compensated supply voltage for internal
circuits and allows a wide operating supply range.
If a magnetic flux density larger than threshold Bop, DO is turned
on (low). The output state is held until a magnetic flux density
reversal falls below Brp causing DO to be turned off (high).
• Brush-less DC Motor Commutation
• RPM Detection
• Consumer and industrial position sensor
• Flow meters
Typical Application Circuit
AH3761
1
2
3
Vdd
Output
GND
R
Features
General Description
Application
