MCT8315A数据手册TI中文资料规格书

描述 Description

The MCT8315A 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- to 24-V brushless-DC motors requiring up to 4-A peak current. The MCT8315A integrates three ½-bridges with 40-V absolute maximum capability and a low RDS(ON) of 240 mΩ (high-side + low-side FETs). MCT8315A integrates power management circuits including an voltage-adjustable buck regulator (3.3 V / 5 V, 170-mA) and LDO (3.3 V, 20 mA) that can be used to power external circuits.

Sensorless trapezoidal control is highly configurable (motor start-up/stop behavior, fault handling, closed loop operation) through register settings in a non-volatile EEPROM, which allows the device to operate stand-alone once it has been configured. The MCT8315A receives a speed command through a PWM signal, analog voltage, variable frequency square wave or I2C instruction. There are a large number of protection features integrated into the MCT8315A to protect the device, motor, and system against fault events.

Documentation for reference:Refer MCT8315A tuning guideRefer to the MCT8315A EVM GUI

特性 Features

• Three-phase BLDC motor driver with integrated sensorless motor control algorithm
• Code-free high speed Trapezoidal Control
• Supports up to 3 kHz (electrical frequency)
• Very fast start-up time (2C based speed input
• Active Demagnetization to reduce power losses
• Configurable motor start-up and stop options
• Closed speed/power loop options
• Anti-voltage surge (AVS) protection prevents DC bus voltage spike during motor deceleration

• 4.5- to 35-V operating voltage (40-V abs max)
• High output current capability: 4-A peak
• Low MOSFET on-state resistance
• RDS(ON) (HS + LS) at TA = 25°C : 240-mΩ (typ.)

• Low power sleep mode
• 5-µA (maximum) at VVM = 24-V, TA = 25°C

• Speed loop accuracy: 3% with internal clock and 1% with external clock reference
• Customer-configurable non-volatile memory (EEPROM) to store device configuration
• Supports up to 100-kHz PWM frequency for low inductance motor support
• Does not require external current sense resistors; uses built-in current sensing
• Built-in 3.3-V, 20-mA LDO regulator
• Built-in 3.3-V/5-V, 170-mA buck regulator
• Dedicated DRVOFF pin to disable (Hi-Z) outputs
• Spread spectrum and slew rate for EMI mitigation
• Suite of integrated protection features
• Supply under voltage lockout (UVLO)
• Supply over voltage protection (OVP)
• Motor lock detection (5 different types)
• Over current protection (OCP)
• Thermal warning and shutdown (OTW/TSD)
• Fault condition indication pin (nFAULT)
• Optional fault diagnostics over I2C interface