Description

The AH477 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 comparator to provide switching hysteresis for noise rejection, a bi-directional drivers for sinking and driving large current load. It also includes an internal bandgap regulator to provide temperature compensated bias for internal circuits and allows a wide operating supply voltage range.

Features

· On-Chip Hall Sensor

· Operating Voltage: 4V to 20V

· H-Bridge Output Drivers for Single Coil

· Internal Bandgap Regulator for Temperature Compensation

· Low Output Switching Current Noise

· -20oC to 85oC Operating Temperature

· Low Profile TO-94 (SIP-4L) Package

· ESD Rating: 3000V (Human Body Model)

Applications

· Single-Coil Brushless DC Motor

· Single-Coil Brushless DC Fan