集成的步进电机驱动双极步进电机微步和可编程的电流分布 Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile
Description
The is an integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile look-up-table to allow a flexible adaptation of the stepper motor characteristics and intended operating conditions.
It is possible to use different current profiles depending on target criteria: audible noise, vibrations, rotation speed or torque.
Features
■ Two full bridges for max. 1.3 A load RDSON= 500 m
■ Programmable current waveform with look-up table: 9 entries with 5 bit resolution
■ Current regulation by integrated PWM controller and internal current sensing
■ Programmable stepping mode: full, half, mini and microstepping
■ Programmable slew rate for EMC and power dissipation optimization
■ Programmable Fast-, Slow-, Mixed- and Auto Decay Mode
■ Full-scale current programmable with 3 bit resolution
■ Programmable stall detection
■ Step clock input for reduced µController requirements
■ Very low current consumption in standby mode IS< 3 µA, typ. Tj 85 °C
■ All outputs short circuit protected with openload, overload current, temperature warning and thermal shutdown
■ The PWM signal of the internal PWM controller is available as digital output.
■ All parameters are guaranteed for 3 V < Vcc < 5.3 Vand for 7 V < Vs < 20 V
Applications
