Speed Measurement
Revolution Counting
Dual coils Brush-less DC Fan
Dual coils Brush-less DC Motor
n APPLICATION
Package: TO-94
-20 to 85 operating temperature
Building-in protecting diode only for chip reverse power connecting
250mA(avg) output sink current
2.6V to 20V operating voltage
and hysteresis settings for SDC209
On-chip Hall sensor with two different sensitivity
n FEATURES
For DC fan application, sometimes need to test power reverse connection condition. Internal diode only protects chip-side but not for coil-side. If necessary, add one external diode to block the reverse current from coil-side.
While the magnetic flux density(B) is larger than operate point (BOP). Do will turn on (low), and meanwhile DOB will turn off (high). Each output is latched until B is lower than release point (Brp), and then DO, DOB transfer each state.
The SDC209 are integrated Hall Sensors with output drivers, mainly designed for electronic, communication of bush-less DC Fan. This IC internally includes the regulator, protecting diode. Hall plate, amplifier, comparator, and a pair of complementary open-collector outputs (DO DOB).
n GENERAL DESCRIPTION
The SDC209 are integrated Hall Sensors with output drivers, mainly designed for electronic, communication of bush-less DC Fan. |