AH285 - Diodes Incorporated

AH285 HALL-EFFECT SMART FAN MOTOR CONTROLLER

Pin Assignments The AH285 is a single-chip solution for driving two-coil brushless direct current (BLDC) fans and motors. The device includes a Hall-effect sensor, dynamic offset correction and two complementary open-drain output drivers with internal Zener diode protection. To help protect the motor coils, the AH285 provides Rotor Lock Protection which sh.

Features

Applications
• Single-chip solution
• Operating Voltage: 3.8V to 20V
• Built-in Hall sensor and input amplifier
• Tachometer (FG) output
• Rotor Lock Protection (Lock detection, output shutdown and automatic re-start)
• Built-in Zener protection for output driver
• Average output current up to 500mA
• Packaged in SOT89-5L
• Green Molding Compound
• Two-coil BLDC cooling fans
• Low to medium voltage, low power BLDC motors Typical Application Circuit Vdd (12V) D2 FG D3 D1 Rpu C3 54 285 123 GND Coil2 Coil1 R1 R2 C1 C2 Notes: 12V DC Brush-less Fan with FG output function 1. Typically it.