ATS177 (Obsolete)

Description

ATS177 is an integrated Hall effect latched sensor designed for electronic commutation of brush-less DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a schmitt trigger to provide switching hysteresis for noise rejection, and open-collector output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. If a magnetic flux density larger than threshold Bop, DO is turned on (low). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off (high).

Feature(s)

3.5V to 20V DC operation voltage

Temperature compensation

Wide operating voltage range

Open-Collector pre-driver

25mA maximum sinking output current

Reverse polarity protection

Lead Free Package: SIP-3L

Lead Free Finish/ RoHS Compliant

Application(s)

Brush-less DC Motor

Brush-less DC Fan

Revolution counting

Speed measurement