FS177

FS177 Technology 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. Low Voltage Hall Effect Latch Features w w w w w Wide operating voltage range: 3.0V to 20V Maximum output sink current 25mA Open-Collector pre-driver Reverse polarity protection Package : TO-92SP-3 TO-92SP-3 Typical Application Circuit +12V R1 L1 L2 FS177 1 Vcc Gnd 2 Output 3 R2 C1 C2 Brushless DC Fan Rev0.4 Sep. 25, 2006(LF) FS177 Data Sheet Page 1 / 1 Free Datasheet http://www.datasheet-pdf.com/ FS177 Technology Functional Block Diagram VCC Low Voltage Hall Effect Latch 1 Regulator Hall Sensor 3 Output 2 Gnd Mark View Pin Descriptions NAME NO. STATUS VCC 1 P DESCRIPTION IC Power Supply 177 . GND 2 P IC Ground It is low state during the N magnetic field. Output 1 2 3 3 O Year Ex: 1 (2001) 2 (2002) Week of Year Product Ver. Rev0.4 Sep. 25, 2006(LF) FS177 Data Sheet Page 2 / 2 Free Datasheet h...