[原创]ST L99SM81V汽车双极步进马达驱动解决方案

ST公司的L99SM81V是汽车级的综合驱动器,用于双极两相步进马达,该马达具有可编幅度的电流控制微步进功能.器件具有5V电压稳压器以便给外接传感器供电.L99SM81V集成的串行外设接口(SPI)使得可调整器件参数,控制所有的工作模式和读出诊断信息.数字I/O也可选择以用于更灵活和更可靠的应用控制.器件满足AEC-Q100资质,步进马达驱动器电流高达1.35A,可编程的步进模式包括全步进,半步进,迷你步进,1/8微步进,1/16微步进.电流调整回路有等效的10位分辨率.器件具有两个4位可编满刻度电流放大:一个用于RUN,另一个用于HOLD模式.6为DAC用于基准电流产生.PWM频率摇摆可降低EM能量.器件具有输出保护和诊断(开路负载,对电池短路和对地短路),集成的ADC用于线圈电压检测和失速检测,5V低压降稳压器用于短路保护,待机模式具有非常低的电流消耗(典型值为10 μA).热告警和关断功能.主要用在汽车电子的双极2相步进马达驱动器如自适应前灯系统或平视显示器投映仪.本文介绍了L99SM81V主要特性,框图,步进马达驱动器应用框图和评估板AEK-MOT-SM81M1主要特性,步进马达应用框图,电路图,材料清单.

 The L99SM81V is an automotive grade integrated driver for bipolar two-phase stepper motors capable of current controlled micro-stepping with programmable amplitude. The device features a 5 V voltage regulator to supply external sensors.

The integrated Serial Peripheral Interface (SPI) makes it possible to adjust device parameters, control all operating modes and read out diagnostic information. Digital I/Os are also optionally usable for more flexible and reliable application control.

L99SM81V主要特性:

· AEC-Q100 qualified

· Stepper motor driver with up to 1.35 A current capability

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