AH3231Q, AH3232Q, AH3233Q, AH3270Q, AH3271Q, AH3272Q TWO-WIRE AUTOMOTIVE HALL EFFECT UNIPOLAR / LATCH SWITCHES Description Pin Assignments The AH3231Q, AH3232Q, AH3233Q, AH3270Q, AH3271Q, and AH3272Q are high voltage, high sensitivity two-wire Hall Effect (Top View) Unipolar/Latch switch ICs with automotive-compliant AEC-Q100 qualification designed for position and proximity sensing in GND automotive applications, such as seat and seatbelt buckle, transmission actuator, gear position, wiper, door/trunk closure, etc. 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 VDD NC internal circuits. For robustness and protection, the device has built-in reverse blocking diode with a Zener clamp on the supply. 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) For AH3231Q, AH3232Q, and AH3233Q 2-wire unipolar switches: 3 GND when the flux density (south pole) exceeds B , the supply current OP 2 NC state is turned on (low or high). The output is held until a magnetic 1 VDD flux density falls below B , causing output current to be turned off. RP For AH3270Q, AH3271Q, and AH3272Q 2-wire latch switches: when SIP-3 (Future Product) , output current is turned the magnetic flux density is larger than BOP on (high). The output state is held until a magnetic flux density reversal falls below B , causing output current to be turned off (low). RP Features and Performance Applications Unipolar: AH3231Q, AH3232Q, AH3233Q Position and Proximity Sensing in Automotive Applications Latch: AH3270Q, AH3271Q, AH3272Q Seat position Output Polarity: Seatbelt buckle Direct: AH3232Q, AH3233Q Wiper position Inverted: AH3231Q Window lifter Wide Supply Voltage Operation: 2.7V to 27V Gear selection position Temperature Coefficient -1100ppm/C (AH3232Q, AH3233Q) Chopper Stabilized Design Provides: Superior Temperature Stability Minimal Switch Point Drift Enhanced Immunity to Stress Battery polarity reverse connection protection Transient Spike Voltage Protection Over-Temperature Shut Down and Auto-Restart UVLO Protection High ESD Rating: HBM = 8kV, CDM = 1kV Temperature Range:-40C to +150C Totally Lead-Free & Fully RoHS Compliant (Notes 1, 2) Halogen- and Antimony-Free. Green Device (Note 3) The AH3231Q, AH3232Q, AH3233Q, AH3270Q, AH3271Q, and 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. AH3231Q, AH3232Q, AH3233Q, AH3270Q, AH3271Q, AH3272Q Typical Applications Circuit V+ R L 100 VSENSE V DD C IN AH323xQ 0.01uF GND High-side sensing V+ V DD C IN AH323xQ 0.01uF GND VSENSE R L 100 Low-side sensing Notes: 4.The decoupling capacitor CIN between VDD and GND pins is needed for power stabilization and to strengthen the noise immunity recommended capacitance is 100nF, as close to IC as possible. Pin Descriptions Package: SC59 and SIP-3 (Ammo Pack and Bulk Pack) Pin Number Pin Name Function 1 V Supply voltage input DD 2 NC No connection can be connected to VDD, GND, or left open. 3 GND Ground AH3231Q, AH3232Q, AH3233Q, 2 of 18 September 2020 AH3270Q, AH3271Q, AH3272Q www.diodes.com Diodes Incorporated Document number: DS41821 Rev. 1 - 2