TI MCT8316A 40V 8A无传感器梯形控制3相BLDC马达驱动器解决方案

TI公司的MCT8316A 40V(最大) 8A(峰值)无传感器梯形控制的3相BLDC马达驱动器,用于需要高速工作(高速3kHz)或非常快起动时间(<50ms)的12V到24V和高达8A峰值电流的无刷DC马达. MCT8316A集成了具有最大电压40V和非常低95 m (高边+低边) RDS(ON)的三个1/2 H桥.可调整降压稳压器和LDO的功率管理特性产生用于器件的3.3V或5.0V电压轨,并能来给外部电路供电.无传感器梯形控制通过寄存器设定(MCT8316AV)或硬件引脚(MCT8316AT)是高度可配置的,从马达起动行为到闭环工作.寄存器设定能存储在非易失EEPROM,一当配置完成就能允许器件单独工作. MCT8316A允许高水平的监测.算法上任何变化能被显示,并通过两个12位DAC作为模拟输出观测到.这些特性提供有效方法来调整速度回路和马达加速度.器件通过PWM输入,模拟电压,频率输入或I2C指令来接收速度指令.器件的保护特性包括电源欠压锁住(UVLO),电荷泵欠压锁住(CPUV),过流保护(OCP),AVDD欠压锁住(AVDD_UV),降压稳压器锁住UVLO,马达锁住检测和超温告警与关断(OTW和TSD).故障事件在nFAULT引脚指示,详细故障信息可在寄存器找到.主要用在BLDC马达模块,机器人真空吸尘电机,摩托车燃油泵,设备风扇和泵,汽车风扇和鼓风机,医用无创呼吸机(CPAP)鼓风机.本文介绍了MCT8316A主要特性,简化电路,功能框图, BLDC马达换向的主动退磁电路以及基本应用电路以及评估模块MCT8316AEVM主要特性和电路图.

The MCT8316A provides a single-chip, codefree sensorless trapezoidal solution for customers requiring high speed operation (up to 3kHz electrical) or very fast startup time (<50ms) for 12- to 24-V brushless-DC motors up to 8-A peak current. The MCT8316A integrates three 1/2-H bridges with 40-V absolute maximum capability and a very low RDS(ON) of 95 mΩ (high-side + low-side). Power management features of an adjustable buck regulator and LDO generate the 3.3-V or 5.0-V voltage rails for the device and can be used to power external circuits.

Sensorless trapezoidal control is highly configurable through register settings (MCT8316AV) or hardware pins (MCT8316AT) ranging from motor start-up behavior to closed loop operation. Register settings for MCT8316AV can be set in non-volatile EEPROM, which allows the device to o...