General Description
The AH477A is an integrated Hall sensor with H bridged output driver designed for 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 tem
perature compensated bias for internal circuits and allows a wide operating supply voltage range.

Features
· On-Chip Hall Sensor
· Operating Voltage: 3.5V to 18V
· H-Bridge Output Drivers for Single Coil
· Internal Bandgap Regulator for Temperature Compensation
· Low Output Switching Current Noise
· Operating Temperature: -20oC to 85oC
· Low Profile TO-94 (SIP-4L) Package
· ESD Rating: 6000V (Human Body Model)
· Suitable for PWM Power Supply Control Speed
 

Applications
· Single-coil Brushless DC Motor
· Single-coil Brushless DC Fan