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| 文章來源： 更新時間：2015/4/22 9:15:00 |
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TI公司的F2802xPiccolo系列MCU是采用C28x處理器核和集成控制外設的微控制器,哈佛總線架構,工作頻率高達60MHz,內部電壓穩壓器可采用單電源3.3V工作,集成的HRPWM模塊可采用雙邊沿控制(頻率調制),模擬比較器具有10位基準電壓,主要用于白色家電,開關電源,DC/DC多輸出電源,LED照明,PFC,縫紉和紡織機器以及電動自行車.本文介紹了F2802x系列MCU主要特性,功能框圖,以及其1kW(36V/32A)無刷馬達參考設計框圖,電路圖和材料清單.
The F2802x Piccolo family of microcontrollers provides the power of the C28x core coupled with highly integrated control peripherals in low pin-count devices. This family is code-compatible with previous C28x-based code, as well as providing a high level of analog integration.
An internal voltage regulator allows for single-rail operation. Enhancements have been made to the 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 PWM outputs. The ADC converts from 0 to 3.3-V fixed full-scale range and supports ratio-metric VREFHI/VREFLO references. The ADC interface has been optimized for low overhead and latency.
F2802x系列MCU主要特性:
High-Efficiency 32-Bit CPU (TMS320C28x)
60 MHz (16.67-ns Cycle Time)
50 MHz (20-ns Cycle Time)
40 MHz (25-ns Cycle Time)
16 x 16 and 32 x 32 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)
Endianness: Little Endian
Low Cost for Both Device and System:
Single 3.3-V Supply
No Power Sequencing Requirement
Integrated Power-on and Brown-out Resets
Small Packaging, as Low as 38-Pin Available
Low Power
No Analog Support Pins
Clocking:
Two Internal Zero-pin Oscillators
On-Chip Crystal Oscillator/External Clock Input
Dynamic PLL Ratio Changes Supported
Watchdog Timer Module
Missing Clock Detection Circuitry
Up to 22 Individually Programmable, Multiplexed GPIO Pins With Input Filtering
Peripheral Interrupt Expansion (PIE) Block That Supports All Peripheral Interrupts
Three 32-Bit CPU Timers
Independent 16-Bit Timer in Each ePWM Module
On-Chip Memory
Flash, SARAM, OTP, Boot ROM Available
Code-Security Module
128-Bit Security Key/Lock
Protects Secure Memory Blocks
Prevents Firmware Reverse Engineering
Serial Port Peripherals
One SCI (UART) Module
One SPI Module
One Inter-Integrated-Circuit (I2C) Bus
Enhanced Control Peripherals
Enhanced Pulse Width Modulator (ePWM)
High-Resolution PWM (HRPWM) Module
Enhanced Capture (eCAP) Module
Analog-to-Digital Converter (ADC)
On-Chip Temperature Sensor
Comparator
Advanced Emulation Features
Analysis and Breakpoint Functions
Real-Time Debug via Hardware
2802x, 2802xx Packages
38-Pin DA Thin Shrink Small-Outline Package (TSSOP)
48-Pin PT Low-Profile Quad Flatpack (LQFP)
F2802x系列MCU應用:
• White Goods
• Switch Mode Power Supplies (SMPSs)
• DC-DC Multiple-Output Power Supplies
• Solar Micro Inverters and Converters
• LED Lighting
• Power Factor Correction
• Sewing and Textile Machines
• eBikes
圖1.F2802x系列MCU功能框圖
1kW無刷馬達參考設計
This reference design is a power stage for brushless motors in battery-powered garden and power tools rated up to 1 kW, operating from a 10-cell lithium-ion battery with a voltage range from 36 to 42 V. The design uses 60V, N-channel NexFETsTM featuring a very low drain-to-source resistance (RDS_ON ) of 1.8 mΩ in a SON5x6 SMD package, which results in a very small PCB form factor of 57 × 59 mm. The three-phase gate-driver is used to drive a three-phase MOSFET bridge, which can operate from 6 to 60 V and supports programmable gate current with maximum setting of 2.3-A sink / 1.7-A source. The C2000™ Piccolo™ LaunchPad™ LAUNCHXL-F28027 is used along with this power stage and 120 degree trapezoidal control of BLDC motor with Hall sensors is implemented in software. The cycle by cycle current limit feature in the gate-driver protects the board from excessive current that is caused during motor stalls, by limiting the maximum current allowed in the power stage to a safe level.
1kW無刷馬達參考設計主要特性:
1-kW Power Stage with Hall sensor based Trapezoidal Control for Brushless DC Motor implemented on TMS320F28027 MCU.
Designed to Operate from 10-Cell Li-Ion Battery Voltage Ranging from 30-V to 42-V
Delivers up to 32-ARMS Continuous Motor Current With an Airflow of 400 LFM
Small PCB Form Factor of 57mm x 59 mm using CSD18540Q5B 60-V/400-Apeak, 1.8-mΩ RDS_ON, SON5x6 package MOSFETs for Power Stage
Uses DRV8303 Three-Phase Gate Driver, Which can Operate from 6 to 60-V Input, Supporting Programmable Gate Current With Maximum Setting of 2.3-A Sink / 1.7-A Source
Hardware Cycle-by-Cycle Overcurrent limit with Configurable Threshold for motor stall protection
Provision for Sense Feedback of Individual Phase Voltage, DC Bus Voltage, DC Bus current sense and Low-Side Current sense on Each Phase for Sensorless Control
TPS54061 based 3.3-V/0.15-A Step-Down Buck Converter for Powering MCU
Designed to Operate at an Ambient Temperature of–20℃ to 55℃
圖2.1kW無刷馬達參考設計TIDA-00436板外形圖
TIDA-00436板終端應用:
AC Inverter & VF Drives
Analog Security Camera
Automotive - Lighting
Automotive 48V 1-5kW Brushless DC Motor
Automotive Brushless DC Motors (BLDC)
Automotive Front LED Lighting System (Multistage with AFS)
Clothes Washer & Dryer
Currency Counter
Digital Multimeter: Handheld
E-Bikes & E-Scooters
EV HEV Battery Management System
EV HEV Charger: Level 1 & 2
HVAC Air Handling Unit (AHU)
Industrial Brushed DC Drives
Industrial Stepper Drive
Lighting: General
Lighting: LCD Backlight
Lighting: Multi String LED Driver
Low-Voltage Stepper Motor
Motor Control: High-Voltage
Permanent Magnet
Power Line Communication
Refrigerators & Freezers
Solar Inverter
Solar Micro-Converter
Solar Micro-Inverter
Ventilator
Washing Machine: Low-End
圖3.TIDA-00436板框圖
圖4.TIDA-00436板電路圖(1)
圖5.TIDA-00436板電路圖(2)
圖6.TIDA-00436板電路圖(3)
圖7.TIDA-00436板電路圖(4)
TIDA-00436板材料清單:
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