一文解析ST STSPIN32F0A三相BLDC马达驱动方案

ST公司的STSPIN32F0A是SIP三相BLDC马达驱动器，嵌入了三个可驱动功率MOSFET的半桥栅极驱动器，驱动电流600mA，时钟频率高达48MHz的32位ARM® Cortex®-M0核，4KB SRAM和32KB闪存，工作电压6.7V-45V，内部的DC/DC转换器提供3.3V用来给MCU和外部元件供电，而LDO线性稳压器用来给栅极驱动器供电，主要用在智能制造设备，电动工具，FAN和泵，家用电器如真空吸尘器，电吹风机，空气净化器和咖啡机，以及高技术应用如无人机，教育/家庭机器人，平衡环。本文介绍了STSPIN32F0A主要特性，框图和模拟IC框图，应用案例电路图以及评估板STEVAL-SPIN3202主要特性，元件分布图，电路图和材料清单。

The STSPIN32F0A is a System-In-Package providing an integrated solution suitable for driving three-phase BLDC motors using different driving modes. It embeds a triple half-bridge gate driver able to drive power MOSFETs with a current capability of 600 mA （sink and source）。 The high- and low-side switches of same half-bridge cannot be simultaneously driven high thanks to an integrated interlocking function.

An internal DC/DC buck converter provides the 3.3 V voltage suitable to supply both the MCU and external components. An internal LDO linear regulator provides the supply voltage for gate drivers.

The integrated operational amplifiers are available for the signal conditioning， e.g. the current sensing across the shunt resistors.A comparator with a programmable threshold is integrated to perform the overcurrent protection.

The integrated MCU （STM32F031C6 with extended temperature range， suffix 7 version） allows performing field-oriented control， the 6-step sensorless and other advanced driving algorithms. It has the write-protection and read-protection feature for the embedded Flash memory to protect against unwanted writing and/or reading. It is possible to download the firmware on-the-field through the serial interface thanks to the embedded bootloader.

The STSPIN32F0A device also features overtemperature and undervoltage lockout protections and can be put in the standby mode to reduce the power consumption. The device provides 16 general-purpose I/O ports （GPIO） with the 5 V tolerant capability， one 12-bit analog-to-digital converter with up to 9 channels performing conversions in a single-shot or scan modes， 5 synchronizable general-purpose timers and supports an easy to use debugging serial interface （SWD）。

STSPIN32F0A主要特性：

• Extended operating voltage from 6.7 to 45 V

• Three-phase gate drivers − 600 mA sink/source

− Integrated bootstrap diodes

− Cross-conduction prevention

• 32-bit ARM® Cortex®-M0 core： − Up to 48 MHz clock frequency

− 4-kByte SRAM with HW parity

− 32-kByte Flash memory with option bytes used for write/readout protection

− Availability FW bootloader

• 3.3. V DC/DC buck converter regulator with overcurrent， short-circuit， and thermal protection

• 12 V LDO linear regulator with thermal protection

• 16 general-purpose I/O ports （GPIO）

• 5 general-purpose timers

• 12-bit ADC converter （up to 9 channels）

• I2C， USART and SPI interfaces

• 3 rail-to-rail operation amplifiers for signal conditioning

• Comparator for overcurrent protection with programmable threshold

• Standby mode for low power consumption

• UVLO protection on each power supply： − VM， VDD， VREG and VBOOTx

• On-chip debug support via SWD

• Extended temperature range： -40 to +125 ℃

STSPIN32F0A应用：

• Smart manufacturing equipment

• Power tools， FANs and pumps

• Home appliances： vacuum cleaners， hand/hair dryers， air purifiers and coffee machines

• High-tech applications such as： drones， gimbals， educational/home robots

图1.STSPIN32F0A框图

图2.STSPIN32F0A模拟IC框图

图3.STSPIN32F0A应用案例电路图

评估板STEVAL-SPIN3202

The STEVAL-SPIN3202 three-phase brushless DC motor driver board is an evaluation board based on the STSPIN32F0A and STD140N6F7 MOSFETs. It provides an affordable and easy-to-use solution for the implementation of low voltage motor driving applications.The board is designed for sensored or sensorless vector control - FOC and six-step algorithms with single shunt sensing.

评估板STEVAL-SPIN3202主要特性：

Input voltage from 7V to 45V

Output current up to 15 Arms

Power stage based on STD140N6F7 MOSFETs

Embedded 3.3 V buck regulator

Embedded 12 V LDO regulator

Single shunt current sensing

Digital Hall sensors and encoder input

Overcurrent comparator

Bus voltage sensing

Fully compatible with STM32 PMSM FOC software development kit

6-step sensorless and sensored firmware supported

Embedded ST-LINK/V2-1

Easy user interface with buttons and trimmer

STM32 FW boot loader supported

RoHS compliant

Image

图4.评估板STEVAL-SPIN3202外形图

图5.评估板STEVAL-SPIN3202元件分布图

图6.评估板STEVAL-SPIN3202电路图（1）

图7.评估板STEVAL-SPIN3202电路图（2）

图8.评估板STEVAL-SPIN3202电路图（3）

图9.评估板STEVAL-SPIN3202电路图（4）

评估板STEVAL-SPIN3202材料清单：

推荐课程：

张飞软硬开源，基于STM32 BLDC直流无刷电机驱动器视频套件

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