AH3714A

Description

The AH3713/AH3713A/AH3714/AH3714A/AH3715/AH3716/AH3717 is a high-voltage 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 a wide range of demanding applications, the design is optimized to operate over the supply range of 3.0V to 27V. With chopper-stabilized architecture and an internal bandgap regulator to provide temperature compensated supply for internal circuits, the device provides a reliable solution over the whole operating range. The output has an overcurrent limit.

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 (B_OP), the output is switched on (pulled low). The output is held latched until magnetic-flux density reverses and becomes lower than the release point (B_RP).

Feature(s)

• Bipolar Latch (South Pole: On, North Pole: Off)
• 0V to 27V Operating Voltage Range
• 40V Load Dump Protection
• Sensitivity Options: B_OP and B_RP of ±30G to ±140G Typical
• Resistant to Physical Stress
• Single, Open-Drain or Internal Pullup Output with Overcurrent Limit
• Chopper-Stabilized Design Provides
  • Superior Temperature Stability
  • Minimal Switch-Point Drift
  • Enhanced Immunity to Stress
• Good RF Noise Immunity
• -40°C to +125°C Operating Temperature
• ESD HBM: 8kV, CDM: 1kV
• Industry Standard SC59, SOT23 (Type S) and SIP-3 (Bulk Pack) Packages
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Application(s)

• Brushless DC motor commutation
• Revolution per minute (RPM) measurement
• Flow meters
• Angular and linear encoders and position sensors
• Contactless commutation, speed measurement, and angular position sensing/indexing in consumer home appliances, office equipment, and industrial applications