Driving chip with correcting function and motor driving system applying same

The invention relates to a driving chip with a correcting function. According to the driving chip, variation of an external magnetic field is sensed by a sensing element of a switching-type sensing unit and an unexpected offset of the sensing element of the sensing unit is corrected and returned to zero by a compensating current generated by an automatic correcting circuit through regulating gain multiplying power, so that the sensing element can accurately sense variation of the external magnetic field and correctly points out the position of a rotor, and thus, a motor is driven to correspondingly change phases, noise generated by the DC (Direct Current) motor is reduced and excellent output performance and excellent system stability are reached.