AH284-YG-13

NOT RECOMMENDED FOR NEW DESIGN USE AH2985 AH284 HALL-EFFECT SMART FAN MOTOR CONTROLLER Description Pin Assignments The AH284 is a single-chip solution for driving two-coil brushless (Top View) (Top View) OBSOLETE – PART DISCONTINUED direct current (BLDC) fans and motors. The device includes a Hall284 effect sensor, dynamic offset correction and two complementary Vdd 1 GND 2 1 : Vdd open-drain output drivers with internal Zener diode protection. 2 : DO To help protect the motor coils, the AH284 provides Rotor Lock 3 : DOB Protection which shuts down output drives if rotor lock is detected. 5 NC 284 DO 3 74 DOB 4 : GND The device automatically re-starts when the rotor lock is removed. 1 2 3 4 SIP-4 SOT89-5 The AH284 is available in SIP-4 and SOT89-5 packages. Features • Single-chip Solution • Operating Voltage: 3.8V to 20V • Built-in Hall Sensor and Input Amplifier • Rotor Lock Protection (Lock detection, output shutdown and Applications • Two-coil BLDC Cooling Fans • Low to Medium Voltage, Low Power BLDC Motors automatic re-start) • Built-in Zener Protection for Output Driver • 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) 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