A3981 can use simple step by step and direction input or through SPI compatible interface control, but also can be used to set up a variety of diagnostic information integration function and read. A4980 except with low work function, to as low as 3. 3 V（A3981 of 7 V)The load voltage driver IC, all the other functions the same as the A3981. Low voltage work in some parts of the car is very important in the application of function, because the battery voltage during cold start might be to very low levels. Through programming, the current regulator can work at a fixed downtime or fixed frequency PWM, and through a variety of attenuation model to reduce the audible noise of the motor and improving accuracy step by step. And phase current meter can through the SPI programming, for a particular application set up suitable micro stepping current distribution, further improve the performance of the motor. All phase current of motor through the DMOS full bridge device control, using synchronous rectifier, reduce the power dissipation. On the high side when switching between drive and low side drive, internal circuit and timer can prevent the transconductance and breakdown, so as to avoid the output short circuit. In addition, it also has a low load current and rotor stall detection. Chip level protection include: the high and low temperature warning, thermal shutdown, over-voltage and under-voltage lockout. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
