MCT8317A中文资料24V 最大电压、5A 峰值电流无传感器梯形控制三相 BLDC 电机驱动器数据手册TI规格书

描述 Description

The MCT8317A provides a single-chip, code-free sensorless trapezoidal solution for customers requiring high speed operation (up to 3 kHz electrical) or very fast start-up time (< 50 ms) for 12-V brushless-DC motors up to 5-A peak current. The MCT8317A integrates three ½-bridges with 24-V absolute maximum capability and a very low RDS(ON) of 130 mΩ (high-side + low-side FETs). MCT8317A also features an LDO that generates a 3.3-V voltage rail and can source up to 20 mA to power external circuits.

Sensorless trapezoidal control is highly configurable through register settings ranging from motor start-up behavior to closed loop operation. Register settings for MCT8317A can be set in non-volatile EEPROM, which allows the device to operate stand-alone once it has been configured. The device receives a speed command through a PWM input, analog voltage, variable frequency square wave or I2C command. There are a large number of protection features integrated into the MCT8317A, intended to protect the device, motor, and system against fault events.

Documentation for reference:Refer to theMCT8317A EVM GUI

特性 Features

• Three-phase BLDC motor driver with integrated sensorless motor control algorithm
• Supports up to 3 kHz (electrical frequency)
• Configurable motor start-up and stop options
• Variable monitoring through DACOUT
• 4.5- to 20-V operating voltage (24-V abs max)
• Low MOSFET on-state resistance
• Low power sleep mode
• Speed loop accuracy: 3% with internal clock and 1% with external clock reference
• Does not require external current sense resistor
• Spread spectrum and slew rate for EMI mitigation
• Supply under voltage lockout (UVLO)
• Over current protection (OCP)
• Fault condition indication pin (nFAULT)
• Optional fault diagnostics over I2C interface