Description

The L9942 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

L9942XP1TR属于集成电路（IC） > 电机驱动器，控制器。意法半导体（ST）集团制造生产的L9942XP1TR电机驱动器，控制器产品属于电机驱动器和控制器电源管理集成电路 (PMIC) 系列，可用于控制或操作从某电源施加到电机或相关机电执行器的电源。所实现的具体功能和特性集根据预期负载和预期应用的特性有很大差异，范围从用于有刷电机的简单开环速度控制到基于步进电机的高级闭环运动控制。