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27V Open-Drain Hall Effect Latch
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The DIODES™ AH3712Q is an AEC-Q100 qualified, high-voltage, high-sensitivity, Hall-effect latch IC designed for commutation of brushless DC motors and their speed measurements, angular or linear encoders, and position sensors in automotive applications. To support a wide range of demanding applications, the device is optimized to operate over a 3.0V to 27V supply range. With chopper stabilized architecture and an internal bandgap regulator to provide temperature-compensated supply for internal circuits, the AH3712Q provides a reliable solution over the whole operating range. The device has a reverse blocking diode with Zener clamps on the supply and output, which also has an overcurrent limit.
The single, open-drain output can be switched on with a South pole of sufficient strength and switched off with a 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 and latched until magnetic-flux density reverses and becomes lower than the release point (BRP).
The SOT23 and SC59 packages have opposite magnetic operating and release polarity. The SOT23, SIP-3 (Bulk), and U-DFN2020-6/SWP packages require their south pole on the part-marking side while the SC59 requires its south pole to the non-part-marking side.
|Compliance(Only Automotive supports PPAP)||Automotive|
|Output Type||Open Drain|
|Active Output State (B > Bop)||Low|
|Inactive Output State (B < Brp)||High-Z|
|Operating Voltage (V)||3 to 27|
|Average Supply Current (mA)||2.8|
|Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)||10|
|Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)||25|
|Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss)||40|
|Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)||-40|
|Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)||-25|
|Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss)||-10|
|Output Current Capability (mA)||50|
|Operating Ambient Temperature (°C)||-40 to 150|