TI公司的F2806x Piccolo系列MCU包括C28x内核和高度集成控制外设CLA,具有高效32位CPU,工作频率90MHz,16x16和32x32乘法累加器(MAC),哈佛总线架构,嵌入存储器包括多达256KB闪存,100KB RAM,2KB OTP ROM,6路DMA,3.3V工作,主要用在开关电源(SMPS),智能电网和动力线通信,太阳能逆变器和转换器,AC/DC转换器等.本文介绍了F2806x系列主要特性,框图和相关框图,三相无刷/PMSM低电流马达控制解决方案主要特性,电路图和材料清单.
The F2806x Piccolo family of microcontrollers (MCUs) provides the power of the C28x core and CLA coupled with highly integrated control peripherals in low pin-count devices. This family is code-compatible with previous C28x-based code, and also provides a high level of analog integration.
An internal voltage regulator allows for single-rail operation. Enhancements have been made to the High-Resolution Pulse Width Modulator (HRPWM) module to allow for dual-edge control (frequency modulation). Analog comparators with internal 10-bit references have been added and can be routed directly to control the ePWM outputs. The ADC converts from 0 to 3.3-V fixed full-scale range and supports ratio-metric V_REFHI/V_REFLO references. The ADC interface has been optimized for low overhead and latency.

F2806x系列主要特性:
High-Efficiency 32-Bit CPU (TMS320C28x)
90 MHz (11.11-ns Cycle Time)
16 x 16 and 32 x 32 Multiply and Accumulate (MAC) Operations
16 x 16 Dual MAC
Harvard Bus Architecture
Atomic Operations
Fast Interrupt Response and Processing
Unified Memory Programming Model
Code-Efficient (in C/C++ and Assembly)
Floating-Point Unit (FPU)
Native Single-Precision Floating-Point Operations
Programmable Control Law Accelerator (CLA)
32-Bit Floating-Point Math Accelerator
Executes Code Independently of the Main CPU
Viterbi, Complex Math, CRC Unit (VCU)
Extends C28x Instruction Set to Support Complex Multiply, Viterbi Operations, and Cyclic Redundency Check (CRC)
Embedded Memory
Up to 256KB of Flash
Up to 100KB of RAM
2KB of One-Time Programmable (OTP) ROM
6-Channel Direct Memory Access (DMA)
Low Device and System Cost
Single 3.3-V Supply
No Power Sequencing Requirement
Integrated Power-on Reset and Brown-out Reset
Low-Power Operating Modes
No Analog Support Pin
Endianness: Little Endian
JTAG Boundary Scan Support
IEEE Standard 1149.1-1990 Standard Test Access Port and Boundary Scan Architecture
Clocking
Two Internal Zero-Pin Oscillators
On-Chip Crystal Oscillator/External Clock Input
Watchdog Timer Module
Missing Clock Detection Circuitry
Peripheral Interrupt Expansion (PIE) Block That Supports All Peripheral Interrupts
Three 32-Bit CPU Timers
Advanced Control Peripherals
Up to 8 Enhanced Pulse-Width Modulator (ePWM) Modules
16 PWM Channels Total (8 HRPWM-Capable)
Independent 16-Bit Timer in Each Module
Three Input Enhanced Capture (eCAP) Modules
Up to 4 High-Resolution Capture (HRCAP) Modules
Up to 2 Enhanced Quadrature Encoder Pulse (eQEP) Modules
12-Bit Analog-to-Digital Converter (ADC), Dual Sample-and-Hold (S/H)
Up to 3.46 MSPS
Up to 16 Channels
On-Chip Temperature Sensor
128-Bit Security Key and Lock
Protects Secure Memory Blocks
Prevents Reverse-Engineering of Firmware
Serial Port Peripherals
Two Serial Communications Interface (SCI) [UART] Modules
Two Serial Peripheral Interface (SPI) Modules
One Inter-Integrated-Circuit (I²C) Bus
One Multichannel Buffered Serial Port (McBSP) Bus
One Enhanced Controller Area Network (eCAN)
Universal Serial Bus (USB) 2.0
(see Device Comparison Table for Availability)
Full-Speed Device Mode
Full-Speed or Low-Speed Host Mode
Up to 54 Individually Programmable, Multiplexed General-Purpose Input/Output (GPIO) Pins With Input Filtering
Advanced Emulation Features
Analysis and Breakpoint Functions
Real-Time Debug via Hardware
2806x Packages
80-Pin PFP and 100-Pin PZP PowerPAD Thermally Enhanced Thin Quad Flatpacks (HTQFPs)
80-Pin PN and 100-Pin PZ Low-Profile Quad Flatpacks (LQFPs)
F2806x系列应用:
• Switch Mode Power Supplies (SMPSs)
• Smart Grid and Power Line Communications
• Solar Micro Inverters and Converters
• AC/DC Inverters
• Power Factor Correction

图1.F2806x系列框图

图2.F2806x系列系统框图:外设部分

图1.F2806x系列框图:ePWM

三相无刷/PMSM低电流马达控制解决方案
Three-Phase Brushless/PMSM Low Current Motor Control Solution with InstaSPIN Software
This reference design demonstrates a motor control solution for spinning three-phase brushless DC (BLDC) and brushless AC (BLAC) - often referred to as permanent magnet synchronous (PMSM) - motors featuring the C2000™ Piccolo™ microcontroller and the DRV8312 3-phase motor driver. The reference design features a high-performance, power-efficient, cost-effective sensorless field-oriented control (FOC) and sensored/sensorless trapezoidal commutation platform that speeds development for quicker time to market. This reference design is based on the DRV8312 evaluation kit.

马达控制参考设计主要特性:
Full digital control of dual interleaved PFC power converter topology
Worldwide voltage input of 95 VAC to 265 VAC
400 VDC bus operating up to 700 W
C2000 Piccolo TMS320F28069M MCU digitally controls three-phase motors
Supports power metering of rectified input voltage, RMS input voltage, RMS input power, and input line frequency
Includes software, hardware design files, quick start graphical interface, and step-by-step documentation


图2.三相BLDC马达控制板DRV8312和TMS320F28069M MCU外形图

图3.DRV8312评估板电路图(1)

图4.DRV8312评估板电路图(2)

图5.DRV8312评估板电路图(3)

图6.DRV8312评估板电路图(4)

图7.DRV8312评估板电路图(5)

图8.DRV8312评估板电路图(5)

图9.DRV8312评估板电路图(7)
DRV8312评估板材料清单: