资 源 简 介
ATS276/277 are integrated Hall sensors with outputdrivers, mainly designed for electronic commutaTIonof brush-less DC Fan. This IC internally includesthe regulator, protecTIng diode, Hall plate, amplifier,comparator, and a pair of complementaryopen-collector outputs (DO, DOB).While the magneTIc flux density (B) is larger thanoperate point (Bop), DO will turn on (low), andmeanwhile DOB will turn off (high). Each output islatched unTIl B is lower than release point (Brp),and then DO、DOB transfer each state.For DC fan application, sometimes need to testpower reverse connection condition. Internal diodeonly protects chip-side but not for coil-side. Ifnecessary, add one external diode to block the reverse current from coil-side.
