AH3769Q Q HIGH-VOLTAGE, LOW-SENSITIVITY AUTOMOTIVE HALL-EFFECT LATCH Description Pin Assignments The AH3769Q is an AEC-Q100 qualified high-voltage, low-sensitivity Hall-Effect latch IC designed for brushless DC-motor commutation, (Top View) speed measurement, angular or linear encoders and position sensors in automotive applications. To support a wide range of demanding 3 OUTPUT applications, the design is optimized to operate over the supply range GND 2 of 3.0V to 28V. With chopper stabilized architecture and an internal 1 V DD bandgap regulator to provide temperature compensated supply for internal circuits, the AH3769Q provides a reliable solution over the whole operating range. For robustness and protection, the device has SOT23 a reverse blocking diode with a Zener clamp on the supply. The output has an over current limit and a Zener clamp. The single, open-drain output can be switched on with South pole of (Top View) sufficient strength and switched off with North pole of sufficient 3. OUTPUT strength. When the magnetic flux density (B) perpendicular to the 2. GND package is larger than the operate point (B ) the output is switched op on (pulled low). The output is held latched until magnetic flux density 1. V DD reverses and becomes lower than the release point (B ). rp SIP-3 Applications Features Bipolar Latch Operation (South Pole: On, North Pole: off) Brushless DC-Motor Commutation High Sensitivity: B and B of +220G and -220G Typical Revolution Per Minute (RPM) Measurement op rp Single, Open-Drain Output with Overcurrent Limit Angular and Linear Encoder and Position Sensing and Indexing 3.0V to 28V Operating Voltage Range Flow Meters Chopper Stabilized Design Provides Contactless Commutation, Speed Measurement and Angular Superior Temperature Stability Position Sensing/Indexing in Automotive Applications Minimal Switch Point Drift Enhanced Immunity to Stress Good RF Noise Immunity Reverse Blocking Diode Zener Clamp on Supply and Output Pins -40C to +150C Operating Temperature ESD: HBM 8kV, CDM: >2kV AEC-Q100 Grade 0 Qualified Industry Standard SOT23 and SIP-3 Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See Low-Pass Filter Sample and Hold Dynamic Offset Cancellation AH3769Q Q Typical Applications Circuit 3.0V to 28V V DD R L OUTPUT AH3769Q C IN GND Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF. R is the pull-up resistor. IN L Pin Descriptions Package: SOT23 and SIP-3 Pin Number Pin Name Function 1 Power Supply Input VDD 2 GND Ground 3 OUTPUT Output Pin Functional Block Diagram V DD Power switch To All Subcircuits OUTPUT Amp Amp Control Current Limit GND 2 of 13 AH3769Q July 2015 Diodes Incorporated www.diodes.com Document number: DS38078 Rev. 2 - 2 PRELIMINARY - CONFIDENTIAL