DRV10975ZRHFR

IC MTR DRV MULTPHS 6.5-18V 24QFN

1 特性

• 输入电压范围：6.5至18V

• 总驱动器H+LrDS(on)：250mΩ

• 驱动电流：1.5A持续绕组电流（峰值2A）

• 无传感器专有反电动势(BEMF)控制方案

• 连续正弦180°换向

• 无需外部感应电阻

• 用户可通过添加外部感应电阻以灵活监视为电机提供的功率

• 灵活的用户接口选项：

– I2C 接口：访问命令和反馈寄存器

– 专用的SPEED引脚：接受模拟或PWM输入

– 专用的FG引脚：提供TACH反馈

– 可通过EEPROM定制旋转曲线

– 使用DIR引脚进行正向/反向控制

• 集成了降压稳压器，可高效地为内部和外部电路提供电压(5V或3.3V)

• 待机版本(DRV10975)电源电流为4.5mA

• 睡眠版本(DRV10975Z)电源电流为80μA

• 过流保护

• 锁定检测

• 电压浪涌保护

• 欠压闭锁(UVLO)保护

• 热关断保护

• 耐热增强型24引脚散热薄型小外形尺寸 (HTSSOP)

2 应用

• 设备风扇

• 制热、通风与空调控制(HVAC)

3 说明

DRV10975 器件是一款具有集成功率MOSFET的三相 无传感器电机驱动器，可提供高达1.5A的持续驱动电 流。该器件专为成本敏感型、低噪声、低外部组件数量 应用而设计。

DRV10975 器件采用专有无传感器控制方案来提供持 续正弦驱动，可大幅降低换向过程中通常会产生的纯 音。该器件的接口设计简单而灵活。可直接通过 PWM、模拟、或I2C输入控制电机。可通过FG引脚 或I2C 提供电机速度反馈。

DRV10975 器件 采用了一个集成降压稳压器，可高效 地将电源电压降至5V或3.3V，从而为内外部电路供 电。该器件提供睡眠模式和待机模式两种型号，可在电 机停止运转时实现节能。待机模式(4.5mA)型号会使 稳压器保持运行，而休眠模式(80μA)型号会使稳压器 停止工作。在使用稳压器为外部微控制器供电的应用 中使用待机模式型号。

5 说明（续）

用户可通过I2C接口对寄存器中的特定电机参数进行重新编程并可对EEPROM进行编程，以帮助优化既定应用的 性能。DRV10975 器件采用带有外露散热焊盘的高效散热型HTSSOP24引脚封装。额定工作温度为–40°C至 125°C。

6 Pin Configuration and Functions

7 Detailed Description

7.1 Overview

The DRV10975 is a three-phase sensorless motor driver with integrated power MOSFETs, which provide drive current capability up to 1.5 A continuous. The device is specifically designed for low-noise, low external component count, 12-V motor drive applications. The device is configurable through a simple I2C interface to accommodate different motor parameters and spin-up profiles for different customer applications.

A 180° sensorless control scheme provides continuous sinusoidal output voltages to the motor phases to enable ultra-quiet motor operation by keeping the electrically induced torque ripple small.

The DRV10975 features extensive protection and fault detect mechanisms to ensure reliable operation. Voltage surge protection prevents the input Vcc capacitor from overcharging, which is typical during motor deceleration. The devices provides overcurrent protection without the need for an external current sense resistor. Rotor lock detect is available through several methods. These methods can be configured with register settings to ensure reliable operation. The device provides additional protection for undervoltage lockout (UVLO) and for thermal shutdown.

The commutation control algorithm continuously measures the motor phase current and periodically measures the VCC supply voltage. The device uses this information for BEMF estimation, and the information is also provided through the I2C register interface for debug and diagnostic use in the system, if desired.

A buck step-down regulator efficiently steps down the supply voltage. The output of this regulator provides power for the internal circuits and can also be used to provide power for an external circuit such as a microcontroller. If providing power for an external circuit is not necessary (and to reduce system cost), configure the buck step down regulator as a linear regulator by replacing the inductor with resistor.

TI designed the interfacing to the DRV10975 to be flexible. In addition to the I2C interface, the system can use the discrete FG pin, DIR pin, and SPEED pin. SPEED is the speed command input pin. It controls the output voltage amplitude. DIR is the direction control input pin. FG is the speed indicator output, which shows the frequency of the motor commutation.

EEPROM is integrated in the DRV10975 as memory for the motor parameter and operation settings. EEPROM data transfers to the register after power on and exit from sleep mode.

The DRV10975 device can also operate in register mode. If the system includes a microcontroller communicating through the I2C interface, the device can dynamically update the motor parameter and operation settings by writing to the registers. In this configuration, the EEPROM data is bypassed by the register settings.

7.2 Functional Block Diagram