AH3717Q
AUTOMOTIVE HIGH-VOLTAGE
LOW-SENSITIVITY HALL-EFFECT LATCH
Description
Pin Assignments
The AH3717Q is an AEC-Q100 qualified high-voltage, low-sensitivity
Hall-effect latch IC designed for brushless DC-motor commutation
speed measurement, angular or linear encoders and position sensors
in automotive applications. To support a wide range of demanding
applications, the design is optimized to operate over the supply range
of 3.0V to 27V. With chopper stabilized architecture and an internal
bandgap regulator to provide temperature compensated supply for
internal circuits, the AH3717Q provides a reliable solution over the
whole operating range. For robustness and protection, the device has
a reverse blocking diode with a Zener clamp on the supply. The
output has an overcurrent limit and a Zener clamp.
(Top View)
3 OUTPUT
1 VDD
GND 2
SC59 and SOT23 (Type S)
(Top View)
The single, open-drain output can be switched on with south pole of
sufficient strength and switched off with north pole of sufficient
strength. When the magnetic flux density (B) perpendicular to the
package is larger than the operate point (BOP) the output is switched
on (pulled low). The output is held latched until magnetic flux density
reverses and becomes lower than the release point (BRP).
3. OUTPUT
2. GND
VDD
1.
SIP-3 (Bulk Pack)
The magnetic operating and release polarity is opposite for SOT23
(Type S) and SC59 packages. SOT23 (Type S) and SIP-3 (Bulk
Pack) packages will require south pole to the part marking side to
operate while SC59 will require south pole to the non part-marking
side.
Features
Applications
Bipolar Latch (South Pole: On, North Pole: Off)
3.0V to 27V Operating Voltage Range
40V Load Dump Voltage
Brushless DC motor commutation
Revolution per minute (RPM) measurement
Flow meters
Low Sensitivity: BOP and BRP of ±140G Typical
Single, Open-Drain Output with Overcurrent Limit
Chopper-Stabilized Design Provides
Angular and linear encoders and position sensors
Contactless commutation, speed measurement and angular
position sensing/indexing in automotive applications
.
.
.
Superior Temperature Stability
Minimal Switch-Point Drift
Enhanced Immunity to Physical Stress
Good RF Noise Immunity
Reverse-Blocking Diode and Zener Clamp on Supply
-40°C to +150°C Operating Temperature
ESD HBM: 8kV, CDM: 1kV
AEC-Q100 Grade 0 Qualified
Industry Standard SC59, SOT23 (Type S), SIP-3 (Bulk Pack)
Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
The AH3717Q is suitable for automotive applications
requiring specific change control; this part is AEC-Q100
qualified, PPAP capable, and manufactured in IATF16949
certified facilities.
https://www.diodes.com/quality/product-definitions/
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
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www.diodes.com
July 2023
AH3717Q
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Document number: DS45815 Rev. 1 - 2