AH3775-P-B

AH3775 HIGH-VOLTAGE MEDIUM-SENSITIVITY HALL EFFECT LATCH Description Pin Assignments The AH3775 is a high-voltage medium-sensitivity Hall Effect latch IC designed for commutation of brushless DC motors, flow meters, linear encoders and position sensors in industrial and consumer home appliances and personal care applications. To support 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 compensated supply for internal circuits, the AH3775 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. (Top View) 3 OUTPUT GND 2 1 VDD SC59 and SOT23 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 (Top View) on (pulled low). The output is held latched until magnetic flux density reverses and becomes lower than the release point (BRP). 3. OUTPUT The magnetic operating and release polarity is opposite for SOT23 and SC59 packages. SOT23 and SIP-3 packages will require south pole to the part marking side to operate while SC59 will require south pole to the non-part marking side. 1. VDD 2. GND SIP-3 Features Applications • Bipolar Latch Operation (South Pole: On, North Pole: off) • Brushless DC Motor Commutation • 3.0V to 28V Operating Voltage Range • Revolution Per Minute (RPM) Measurement • Medium Sensitivity: BOP and BRP of +70G and -70G Typical • Flow Meters • Single, Open-Drain Output with Overcurrent Limit • Angular and Linear Encoder and Position Sensors • Chopper Stabilized Design Provides: • Contactless Commutation, Speed Measurement and Angular - Superior Temperature Stability Position Sensing/Indexing in Consumer Home Appliances, Office - Minimal Switch Point Drift Equipments and Industrial Applications - 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): 6kV • Industry Standard SC59, 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 http://www.diodes.com/quality/lead_free.html 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