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| NXP Kinetis KV111KW D類音頻放大器參考設計 |
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| 文章來源： 更新時間：2016/6/12 14:54:00 |
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NXP公司的Kinetis KV10和KV11采用ARM Cortex-M0+內核和藹創新的90nm薄膜存儲器(TFS)閃存技術,工作頻率高達75MHz,多達128KB程序閃存,多達16KB RAM,工作電壓1.71到3.6 V,主要用在工業馬達控制,逆變器和低端電源轉換應用.本文介紹了Kinetis KV1x MCU主要特性,框圖和1000W D類音頻放大器參考設計主要特性,電路圖和PCB元件布局圖.
The Kinetis V Series KV11x MCU family is built on ARM Cortex-M0+ core and enabled by innovative 90nm thin film storage(TFS) flash process technology. The KV11x is an extension ofthe existing KV10x family providing increased memory, higherpin count, additional FTMs and a FlexCAN serial interface.
KV11x is ideal for industrial motor control applications, inverters,and low-end power conversion applications.
Kinetis KV1x MCU主要特性:
Performance
• Up to 75 MHz ARM Cortex-M0+ based core
Memories and memory interfaces
• Up to 128 KB of program flash memory
• Up to 16 KB of RAM
System peripherals
• Nine low-power modes to provide power optimizationbased on application requirements
• 8-channel DMA controller
• SWD interface and Micro Trace buffer
• Bit Manipulation Engine (BME)
• External watchdog timer
• Advanced independent clocked watchdog
• Memory Mapped Divide and Square Root (MMDVSQ)module
Clocks
• 32-40 kHz or 4-32 MHz external crystal oscillator
• Multipurpose clock generator (MCG) with frequencylockedloop referencing either internal or externalreference clock
Security and integrity modules
• 80-bit unique identification (ID) number per chip
• Hardware CRC module
Communication interfaces
• One 16-bit SPI module
• One I2C module
• Two UART modules
• One FlexCAN module1
Timers
• Programmable delay block
• Two 6-channelFlexTimers (FTM) for motor control/general purpose applications
• Four 2-channelFlexTimers (FTM) with quadraturedecoder functionality
• 16-bit low-power timer (LPTMR)
Operating Characteristics
• Voltage range: 1.71 to 3.6 V
• Flash write voltage range: 1.71 to 3.6 V
• Temperature range (ambient): –40 to 105℃
Analog modules
• Two 16-bit SAR ADCs
• 12-bit DAC
• Two analog comparators (ACMP) containing a 6-bitDAC and programmable reference input
Human-machine interface
• General-purpose I/O
圖1.Kinetis KV1x MCU框圖
1000W D類音頻放大器參考設計
The 1000 W class-D audio amplifier reference design is intended to provide an example for an audio amplifier along with a push-pull power converter and operates using the Kinetis KV1x Tower series platform or k64 Freedom board. This reference design uses the internal powerful FlexTimer module for modulating the input analog audio on a class-D format and for generating the PWM to control the switching push-pull power supply.
1000W D類音頻放大器參考設計主要特性:
Prototype quickly using the Tower System module or Freedom System platform to capture analogical audio input, generate the class-D audio output and to control the push-pull power supply.
Together with embedded source code, quickly build an affordable class-D audio amplifier.
Flextimer controls the gate drivers for power Mosfets adding extra protections, such as deadtime insertion, fault control, initialization and polarity control.
Low CPU load, leaving processor available application enhancement.
圖2.1000W D類音頻放大器參考設計外形圖
圖3.1000W D類音頻放大器參考設計電路圖(1)
圖4.1000W D類音頻放大器參考設計電路圖(2)
圖5.1000W D類音頻放大器參考設計電路圖(3)
圖6.1000W D類音頻放大器參考設計PCB元件分布圖 |
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