Current attenuation mode detection circuit of motor driving chip

A current attenuation mode detection circuit of a motor driving chip comprises a current attenuation time control circuit, an external parallel circuit and a digital logic control circuit. The current attenuation time control circuit comprises a plurality of NMOS transistors, a plurality of PMOS transistors, a core circuit and a current mirror structure, the external parallel circuit comprises a capacitor CT and a resistor RT and is connected with the current attenuation time control circuit, and the digital logic control circuit comprises a comparator, a latch and a logic gate circuit. The input signals of the digital logic control circuit are output signals of the current attenuation time control circuit and the external parallel circuit, and an output signal switch of the digital logic control circuit is still fed back to the current attenuation time control circuit. The current attenuation time is decided by the CT and the RT, and the fast- attenuation time and the slow- attenuation time are controlled jo