General Description
The FS177 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.
A north pole of sufficient strength will turn the output ON. In the absence of a magnetic field, the
output is OFF.
Features
w Wide operating voltage range: 3.0V to 20V
w Maximum output sink current 25mA
w Open-Collector pre-driver
w Reverse polarity protection
w Package : TO-92SP-3

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