AH2984

AH2984 TWO PHASE HALL-EFFECT SMART FAN MOTOR CONTROLLER Description The AH2984 is a single-chip solution for driving two-coil brushless direct current (BLDC) fans and motors. The device includes a Halleffect sensor, dynamic offset correction and two complementary open-drain output drivers with internal Zener diode protection. It is optimized for low start-up voltage. Pin Assignments (Top View) AH2984 To help protect the motor coils, the AH2984 provides Rotor Lock Protection which shuts down output drives if rotor lock is detected. The device automatically re-starts when the rotor lock is removed. Over temperature shutdown provides thermal protection for the device. The AH2984 is available in SIP4 and SOT89-5 packages. 12 3 4 SIP-4 1 : VDD 2 : DO 3 : DOB 4 : GND (Top View) Features Single-chip solution Operating Voltage: 2.5V to 15V Built-in Hall sensor and input amplifier Rotor Lock Protection (Lock detection, output shutdown and automatic re-start) Built-in reverse voltage protection diode Built-in Zener protection for output drivers Average output current up to 500mA Packages: SIP-4 and SOT89-5 “Green” Molding Compound Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Vdd 1 5 NC GND 2 AH2984 GND DO 3 74 DOB SOT89-5 Applications Two-coil BLDC Cooling Fans Low Voltage/ Low Power BLDC Motors Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoH...