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. 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.

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)

Applications

• Two-coil BLDC Cooling Fans

• Low Voltage/ Low Power BLDC Motors