SDC277

The SDC277 is an integrated circuit which includes Hall sensor and output drive circuits. It’s widely used in 2-phase brushless DC motor and Fan. It’s composed of power reverse protection circuit, high stable voltage regulator, Hall voltage generator, a differential amplifier, Schmitt trigger and open collector output (DO, DOB). In the case of power supply reverse connecting, the internal protection diode can protect IC but not protect coil, a protection diode can be added if necessary.