AH3777 Datasheet | Diodes Incorporated

HIGH-VOLTGAE LOW-SENSITIVITY HALL EFFECT LATCH Description The AH3777 is a high voltage, low sensitivity Hall effect latch IC designed for mutation of brushless DC motors, flow meters, linear encoders and position sensors in industrial and consumer home appliance and personal care applications. To support a wide range of demanding applications, the design is optimized to operate over the supply range of 3.0V to 28V. With chopper-stabilized architecture and an internal bandgap regulator to provide temperature pensated supply for internal circuits, the AH3777 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. 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 bees lower than the release point (BRP). Pin Assignments (Top View) GND 2 3 OUTPUT 1 VDD SOT23 (Top View) SIP-3 3. OUTPUT 2. GND 1. VDD Features - Bipolar Latch Operation (South Pole: On, North Pole: off) - 3.0V to 28V Operating Voltage Range - Low Sensitivity: BOP and BRP of +140G and -140G Typical - Single, Open-Drain Output with Overcurrent Limit - Chopper Stabilized Design Provides - Superior Temperature Stability - Minimal Switch Point Drift - Enhanced Immunity to Stress - Good RF Noise Immunity - Reverse Blocking Diode and Zener Clamp on Supply - -40°C to +125°C Operating Temperature - ESD (HBM): 6k V - Industry Standard SOT23 and SIP-3 Packages - Totally Lead-Free & Fully Ro HS pliant (Notes 1 & 2) - Halogen and Antimony Free. “Green” Device (Note 3) Applications - Brushless DC Motor mutation - Revolution Per...