AH3231Q-AH3234Q/
AH3270Q-AH3272Q
TWO-WIRE AUTOMOTIVE HALL EFFECT UNIPOLAR / LATCH SWITCHES
Description
Pin Assignments
The DIODES™ AH3231Q-AH3234Q/AH3270Q-AH3272Q are high
voltage, high sensitivity, two-wire Hall Effect Unipolar/Latch switch ICs
with automotive-compliant AEC-Q100 qualification; designed for
position and proximity sensing in automotive applications, such as
seat and seatbelt buckle, transmission actuator, gear position, wiper,
door/trunk closure, etc.
(Top View)
GND
To support a wide range of demanding applications, the design is
optimized to operate over a supply range of 2.7V to 27V. These
features include a chopper-stabilized architecture and an internal
bandgap regulator to provide temperature compensated supply for
internal circuits. For robustness and protection, the device has built-in
reverse blocking diode with a Zener clamp on the supply.
VDD
NC
SC59 (Type A1)
The built-in thermal protection also shuts down the chip if temperature
rises to an abnormal value. This will automatically restart the chip
once the junction temperature drops below the safe value.
(Top View)
GND
NC
3
2
1
For the AH3231Q, AH3232Q, AH3233Q, and AH3234Q two-wire
unipolar switches: when the flux density (south pole) exceeds BOP
the supply current state is turned on (low or high). The output is held
until a magnetic flux density falls below BRP, causing output current to
be turned off.
,
VDD
SIP-3
For the AH3270Q, AH3271Q, and AH3272Q two-wire latch switches:
when the magnetic flux density is larger than BOP, output current is
turned on (high). The output state is held until a magnetic flux density
reversal falls below BRP, causing output current to be turned off (low).
Applications
Features and Performance
Unipolar: AH3231Q, AH3232Q, AH3233Q, AH3234Q
Latch: AH3270Q, AH3271Q, AH3272Q
Output Polarity:
Position and proximity sensing in automotive applications
Seat positioning
Seatbelt buckles
Wiper positioning
Window lifters
.
.
Direct: AH3232Q, AH3233Q
Inverted: AH3231Q, AH3234Q
Gear selection positioning
Wide Supply Voltage Operation: 2.7V to 27V
Temperature Coefficient -1100ppm/°C (AH3232Q, AH3233Q,
AH3234Q)
Chopper Stabilized Design Provides:
.
.
.
Superior Temperature Stability
Minimal Switch Point Drift
Enhanced Immunity to Stress
Battery polarity reverse connection protection
Transient Spike Voltage Protection
Overtemperature Shut Down and Auto-Restart
UVLO Protection
High ESD Rating: HBM = 8kV, CDM = 1kV
Temperature Range:-40°C to +150°C
Totally Lead-Free & Fully RoHS Compliant (Notes 1, 2)
Halogen and Antimony Free. “Green” Device (Note 3)
The AH3231Q-AH3234Q/AH3270Q-AH3272Q are suitable for
automotive applications requiring specific change control;
these parts are AEC-Q100 qualified, PPAP capable, and
manufactured in IATF 16949 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
November 2022
© Diodes Incorporated
AH3231Q-AH3234Q/AH3270Q-AH3272Q
Document number: DS41821 Rev. 5 - 2