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