AH2984-YG-13

AH2984 TWO PHASE HALL-EFFECT SMART FAN MOTOR CONTROLLER Description Pin Assignments The AH2984 is a single-chip solution for driving two-coil brushless (Top View) 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 AH2984 optimized for low start-up voltage. 1 : VDD To help protect the motor coils, the AH2984 provides Rotor Lock 2 : DO Protection which shuts down output drives if rotor lock is detected. 3 : DOB The device automatically re-starts when the rotor lock is removed. Over temperature shutdown provides thermal protection for the 1 2 device. 3 4 : GND 4 SIP-4 The AH2984 is available in SIP4 and SOT89-5 packages. (Top View) Vdd 1 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 GND 2 5 NC AH2984 DO 3 GND 74 DOB automatic re-start) SOT89-5 • 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) • Two-coil BLDC Cooling Fans Halogen and Antimony Free. “Green” Device (Note 3) • Low Voltage/ Low Power BLDC Motors • Notes: Applications 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