FEATURES
- On-chip Hall sensor - Bi-direction H type output drivers for single coil - Internal bandgap regulator allows temperature compensated operations and a wide operating voltage range - High output sinking capability up to 250mA - Operating voltage: 3.5V~20V - Low output switching current noise - Build-in shunt Zener protection for output driver - SOP-7L provide FG output pin - Package: SIP-4L and SOP-7L ATS477 GENERAL DESCRIPTION
ATS477 that integrates Hall sensor with output drivers is designed for electrical commutation of brush-less DC motor application. The device includes on-chip Hall voltage generator for magnetic sensing, the error amplifier that amplifies the Hall voltage, a comparator that is to provide switching hysteresis for noise rejection, the bi-direction drivers for sinking and driving large current load, and the frequency generator (FG) that provides a signal proportional to rotation speed. Internal bandgap regulator is used to provide temperature compensated bias for internal circuits and allows a wide operating supply voltage range.
Anachip
