RE3209 320X90X311 Aluminum enclosure

RE3209 320X90X311 Aluminum enclosure
http://www.siliconray.com/re3209-320x90x311-aluminum-enclosure.html

Outside Dimension:   W x H x L = 320mm x 90mm x 311mm(13''x4''x13'')
Inside Dimension:      W x H x L = 220mm x 85mm x 300mm(9''x3.5''x12'')
Material:                      Aluminum
Front Thickness:          8mmBack Thickness:          3mm
Finish:                         Brushed, hard anodized
Net Weight:                 5.2kg

TDA7297-Mini 15Wx2 Audio Amplifier Board

TDA7297-Mini 15Wx2 Audio Amplifier BoardA mini 15Wx2 board designed with TDA7297
Features- Designed with TDA7297
http://www.siliconray.com/tda7297-mini-15wx2-audio-amplifier-board.html
- Very small size
- Single 12V power supply
- 15W x 2 max output power

DSP development board function

DSP development board function
http://www.siliconray.com/development-boards/ti-dsp/bp5509-02-tms320vc5509-development-board.html
DSP development board, is the function of the research and development on DSP, used in the development of digital signal processor (DSP) launch circuit board, and provide the principle diagram and the source code to the customer. DSP especially in TI company's DSP market share is the largest, have very widely customer base. In the DSP development board, Beijing road and vertical and horizontal technology Co., LTD. (the house of development board) introduced a Easy series DSP development board, including Easy2812
http://development-board.blogspot.com/2012/02/how-to-buy-scm-development-board.htmldevelopment board, Easy5509 development board, especially suitable for the students to learn to use. Also introduced QQ series development board, including QQ2812 development board, QQ5509 development board, suitable for company researchers use. Consumer demand auxiliary driving system with advanced technology need precision functions and the size and shape of very small high reliability components. Because these system size is small, and is very close to each other, so also requires ?

DSP development board profile

DSP development board profile
http://www.siliconray.com/development-boards/ti-dsp.html
Development board, is aimed at a chip to the chip as the core, the function of the chip will have extended out, will every part of the function through procedure demonstrate out. At the same time, provide the source program and the principle diagram, so that customers can with the minimum price, the fastest speed to learn the use of the chip, to twice the result with half the effort. DSP, is a digital signal processor. Usually used for data processing algorithm, compared with other processor, its strong data processing power and speed, assembly line structure is its biggest characteristic.

DSP development board

DSP development board
http://development-board.blogspot.com/2012/02/how-to-quick-and-good-learning-arm-have.html
DSP similar filter kinds of experimental is in matlab simulation can, do not need to buy what the development board, if is the image processing of? Need not to need to buy development board
If just algorithm, not dealing with external interface with matlab simulation
If need acquisition or output, had better be in development board
BoHang embedded development board has various kinds of DSP development board

The power modules output current choice

The power modules output current choice
http://www.siliconray.com/tube-6n8p-mosfet-hybrid-hifi-audio-amplifier.html
Because of switch power supply, high working efficiency, and generally can achieve 80% above, therefore, in its output current choice, should be measured accurately or calculation of maximum absorption current electric equipment, in order to make the switch power supply Is adopted with high ratio of performance to price, usually output computation formula Is: Is = KIf type: Is--of switch power supply output current ratings; If-electrical equipment maximum absorption current; K-allowance coefficient, generally take 1.5 ~ 1.8;
Edit this paragraph 3.3 protection circuit
Switching power supply for design must be with the flow, heat, short circuit protection function etc, so in the design should be preferred protection function complete switch power supply module, and the protection circuit technology parameters should be and electrical equipment work characteristics match, in order to avoid damage or electrical equipment

Dc chopper

Dc chopper
http://www.siliconray.com/
DC/DC transform is variable DC voltage transform to a fixed DC voltage, also known as DC chopper. The chopper sensor means has two, one is the pulse width modulation way Ts unchanged, change ton (general), 2 it is frequency modulation (1) Buck circuit--the chopper Buck, the output voltage U0 less than average input voltage Ui, the same polarity. (2) Boost circuit--the booster chopped, and its output voltage is greater than the average U0 input voltage Ui, the same polarity. (3) Buck-Boost circuit--step-down or Boost the chopper device, the output voltage U0 or greater than the average less than the input voltage Ui, the reverse polarity, inductance transmission. (4) Cuk circuit--or the chopper boost blood pressure, the average electricity output
The greater or less than the pressure U0 input voltage Ui, the reverse polarity, capacitance transmission. And Sepic, Zeta circuit. The above for the isolation type DC-DC converter circuit, the isolation type DC-DC converter is shock circuit, a flyback circuit, half bridge circuit, the whole bridge circuit, mosfet circuits. Today's soft switch technology makes DC/DC happen a qualitative leap, the United States VICOR company designs the manufacture various ECI soft switch DC/DC converter, and its maximum output power 300 W, 600 W, 800 W, etc, the corresponding power density for (6.2, 10, 17) W/cm3, efficiency as the (80 ~ 90) %. Japan TDK-Lambda company launched a new soft switch technology using high frequency switching power supply module RM series, the switch frequency for (200 ~ 300) kHz, power density has reached W/cm3 27, the synchronous rectifier (MOSFET instead of the schottky diodes), make the whole circuit ? efficiency