Speed Measurement
Tachometer
Dual coils Brush-less DC Fan
Dual coils Brush-less DC Motor
n APPLICATION
TO-94 package
-20 to 85 operating temperature
Building-in protecting diode for reverse power connecting
300mA(avg) output sink current
3.5V to 20V operating voltage
On-chip Hall sensor with two different magnetic points
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 SDC276 is composed of Hall Sensors and output drivers ,mainly designed for brush-less DC Fan in electronic communication. 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 SDC276 is composed of Hall Sensors and output drivers ,mainly designed for brush-less DC Fan in electronic communication. |