General Description

The AH278 is an integrated Hall sensor with output driver designed for electronic commutation of brushless DC motor applications. The device includes an on-chip Hall sensor for magnetic sensing, an amplifier that amplifies the Hall voltage, a Schmitt trigger to provide switching hysteresis for noise rejection and two complementary open-collector drivers for sinking large load current. It also includes an internal band-gap regulator which is used to provide bias voltage for internal circuits and allows a wide operating supply voltage ranges.

特性 Features

? On-Chip Hall Sensor

? 4V to 30V Supply Voltage

? 500mA (avg) Output Sink Current

? Build in Protection Diode for Reverse Power

Connecting

? -20°C to 85°C Operating Temperature

? Low Profile TO-94 (SIP-4L) Package

? Build in Over Temperature Protection Function

? ESD Rating: 300V(Machine Model)

Applications

? 12V/24V Dual-Coil Brushless DC Motor/Fan

? Power Supply and Switchboard

? Communications Facilities

? Industrial Equipment