tag:blogger.com,1999:blog-71848046194017929122024-03-04T21:09:56.660-08:00anandtronics bloganandtronicshttp://www.blogger.com/profile/03310339063256716683noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7184804619401792912.post-51373147267930164442014-06-22T20:10:00.001-07:002014-06-22T20:10:51.904-07:00How To Select The Right Micro-Controller<div dir="ltr" style="text-align: left;" trbidi="on">
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If you are into software or hardware engineering, one of the most
daunting task for you is probably the selection of the right
micro-controller for your product. While choosing your microcontroller
you are not only required to consider the long and defined list of
technical features, but you also have to take care of other factors like
cost and lead-times. It is indeed tempting to kick start any new
project from straight away choosing your microcontrollers, but the
results of such rush can be disheartening. So before making the rational
decision of choosing the right microcontrollers, these are some must
follow and simple 10 steps which can ensure that the right selection.<br />
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<b>1. List down the required hardware interface.</b><br /><br />Make
use of the general hardware block diagram to make a list of all the
required external interfaces that will be supported by the
microcontrollers. The basic two types of interfaces which will be listed
here will be the communication interfaces like the peripherals such as
USB, I2C, UART, SPI, and so on. These interfaces have a bigger effect oh
how much amount of program space a microcontroller will require to
support. Secondly the engineer requires to chalk out the interfaces like
the digital inputs and outputs, the analog to digital inputs, the
PWM’s, etc. These will define the number of pins required by the
microcontroller. <br /><br /><b>2. Consider the Software architecture</b><br /><br />The
software architecture and requirements is another big factor effecting
the selection of the microcontroller. The weight of the processing
requirements determines if you should choose am 80 MHz DSP or an 8 MHz <a href="http://kitsnspares.com/user1/buyproductsubcat.asp?id=13&subcat=35" rel="nofollow" style="font-size: 100%; font: inherit; vertical-align: baseline;" target="_blank">8051</a>.
Make notes of the requirements which can effect the decision like
algorithms that require floating point mathematics, or high frequency
sensors or control loops, estimates of how frequently these tasks are
being run etc. These will help you make an estimation of how much
processing power will be needed which will again effect the architecture
and frequency of the microcontroller. <br /><br /><b>3. Selecting the architecture</b><br /><br />Once
you are done with step one and two make use of the information to get
an idea of what architecture will be required. Choose between 8 bit, 16
bit and 32 bit ARM core? You will find your answers between the
application and the required software algorithms. Do keep in mind that
you might need to add further features in the future. So if your
features are just right for a 8-bit ARM core, you might want to consider
a higher version.<br /><br /><b>4. Choosing the Right memory requirements</b><br /><br />From
the important requirements in the above steps, here we move to the
critical requirements of a microcontroller. The Flash and the RAM are
indeed two of the most critical <a href="http://kitsnspares.com/user1/buyproduct.asp?id=85" rel="nofollow" style="font-size: 100%; font: inherit; vertical-align: baseline;" target="_blank">components</a>
of any microcontrollers. Making sure that the product do fall short of
the program space or variable space is indeed of the highest priority.
There is nothing more painful then cutting down the features towards the
end of the designing. So always start with higher memory requirements
and you might consider cutting it down in the future. Estimate how much
flash and RAM will be required by making use of the software
architecture and the communication peripherals included in the
application and as we mentioned above do keep in mind that you might
need to add features in the future.<br /><br /><b>5. Power constraints</b><br /><br />Once
you are done with selecting the right architecture and the memory its
now time to step down to the market and get a list of micro-controllers
matching your requirements. Start cut shorting the list by the power
requirements of your device. Make sure you choose the low power parts if
the device will be powered from the battery of the mobile.<br /><br /><b>6. Life cycle of the product</b><br /><br />You
are done with shortlisting the products that matches the above
requirements, so now its time to consider how long of a life cycle are
you planning for your product. If your product's life is 10 years, make
sure that the manufacturer guarantees a 10 year availability of the
micro-controller.<br /><br /><b>7. Look for a development kit</b><br /><br />After
considering all the above factors and almost ready with the selected
alternatives, start to look for a development kit. These development
kits helps you to play with and learn the inner functions of the
controller. If the development kit isn't available, it is probably not
the right choice.<br /><br /><b>8. Look out for compilers and tools </b><br /><br />While
after you have your development kit in hand, you are almost ready with
the right micro-controller. But before you pay and leave back home, the
availability of the compilers and tools is one last but a big and
important factor to consider. Make sure that all required tools like the
compilers, debugging tools and examples codes are already available.
Without these the development process can get difficult, time taking and
expensive.</div>
anandtronicshttp://www.blogger.com/profile/03310339063256716683noreply@blogger.com0tag:blogger.com,1999:blog-7184804619401792912.post-55870347779001459992014-02-04T15:50:00.002-08:002014-02-04T15:50:23.319-08:00TiE Chennai Social Entrepreneurship SIG launch with Villgro <div dir="ltr" style="text-align: left;" trbidi="on">
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anandtronicshttp://www.blogger.com/profile/03310339063256716683noreply@blogger.com0tag:blogger.com,1999:blog-7184804619401792912.post-33503046188026770172013-11-06T17:36:00.005-08:002013-11-06T17:36:56.735-08:00Constant Current AC Input Isolated LED Driver<div dir="ltr" style="text-align: left;" trbidi="on">
<h1 style="background-color: white; border: 0px; font-family: 'Helvetica Neue', Arial, 'Liberation Sans', FreeSans, sans-serif; font-size: 22px; font-weight: 400; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">
Constant Current AC Input Isolated LED Driver</h1>
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Sponsored Product Highlight</div>
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Posted Nov 05th 2013</div>
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<img alt="Constant Current AC Input Isolated LED Driver" height="224" src="http://d3i5bpxkxvwmz.cloudfront.net/resized/images/remote/http_s.eeweb.com/articles/2013/11/04/Constant-Current-AC-Input-Isolated-LED-Driver-1383619880_466_224.png" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;" width="466" /><div class="clearfix news_image_buttons" style="background-color: transparent; border: 0px; margin: 20px auto 0px; outline: 0px; padding: 0px; vertical-align: baseline; width: 520px;">
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ROHM’s BP5875 is a constant current type (85-264VAC) <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">LED</span> driver capable of driving 25W(equivalent) <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">LED</span>s. BP5875 is designed to be a more compact version of the BP5872. The IC features the same key advantages, including a thin form factor, dimming compatibility, harmonics standards compliance, universal input, and high efficiency operation, making it ideal for a variety of applications. BP5875 features an active filter method with built-in <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">PFC</span> circuit that increases the power factor to 0.99, enabling support for high frequencies as well as compliance with IEC61000-3-2.</div>
<div style="background-color: white; border: 0px; font-family: 'Helvetica Neue', Arial, 'Liberation Sans', FreeSans, sans-serif; font-size: 13px; line-height: 19px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">ROHM</span>’s isolated AC input <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">LED</span> driver series provides a thin form factor, harmonics standards compliance, universal input, high efficiency and options for analog or <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">PWM</span> dimming and power factor correction (<span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">PFC</span>).</div>
<div style="background-color: white; border: 0px; font-family: 'Helvetica Neue', Arial, 'Liberation Sans', FreeSans, sans-serif; font-size: 13px; line-height: 19px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<strong style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Features</strong></div>
<ul style="background-color: white; border: 0px; font-family: 'Helvetica Neue', Arial, 'Liberation Sans', FreeSans, sans-serif; font-size: 13px; line-height: 19px; list-style-image: initial; list-style-position: initial; margin: 0px 0px 20px 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Universal input</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Analog dimming function built in</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Eliminates the need for external circuitry</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Compact design: 65 × 130 × 19.2mm</li>
</ul>
</div>
anandtronicshttp://www.blogger.com/profile/03310339063256716683noreply@blogger.com0tag:blogger.com,1999:blog-7184804619401792912.post-58513469696793510192013-11-06T17:31:00.001-08:002013-11-06T17:31:25.247-08:00Dual Low-Side Ultrafast MOSFET Drivers<div dir="ltr" style="text-align: left;" trbidi="on">
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Dual Low-Side Ultrafast MOSFET Drivers</h1>
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Sponsored Product Highlight</div>
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Posted Nov 06th 2013</div>
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<img alt="Dual Low-Side Ultrafast MOSFET Drivers" height="325" src="http://d3i5bpxkxvwmz.cloudfront.net/resized/images/remote/http_s.eeweb.com/articles/2013/11/06/Dual-Low-Side-Ultrafast-MOSFET-Drivers-1383728229_600_325_75.JPG" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;" width="600" /><div class="clearfix news_image_buttons" style="background-color: transparent; border: 0px; margin: 20px auto 0px; outline: 0px; padding: 0px; vertical-align: baseline; width: 520px;">
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The IXDD604/IXDF604/IXDI604/IXDN604 dual high-speed gate drivers are especially well suited for driving the latest <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">IXYS</span><span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">MOSFET</span>s and <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">IGBT</span>s. Each of the two outputs can source and sink 4A of peak current while producing voltage rise and fall times of less than 10ns. The input of each driver is virtually immune to latch up, and proprietary circuitry eliminates cross conduction and current “shoot-through.” Low propagation delay and fast, matched rise and fall times make the<span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">IXD</span>_604 family ideal for high-frequency and high-power applications.</div>
<div style="background-color: white; border: 0px; font-family: 'Helvetica Neue', Arial, 'Liberation Sans', FreeSans, sans-serif; font-size: 13px; line-height: 19px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
The IXDD604 is a dual non-inverting driver with an enable. The IXDN604 is a dual non-inverting driver, the IXDI604 is a dual inverting driver, and the IXDF604 has one inverting driver and one non-inverting driver. The <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">IXD</span>_604 family is available in a standard 8-pin <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">DIP</span> (PI), 8-pin <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">SOIC</span> (<span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">SIA</span>), 8-pin Power <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">SOIC</span> with an exposed metal back (SI), and an 8-pin <span class="caps" style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">DFN</span> (D2) package.</div>
<div style="background-color: white; border: 0px; font-family: 'Helvetica Neue', Arial, 'Liberation Sans', FreeSans, sans-serif; font-size: 13px; line-height: 19px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<strong style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Features</strong></div>
<ul style="background-color: white; border: 0px; font-family: 'Helvetica Neue', Arial, 'Liberation Sans', FreeSans, sans-serif; font-size: 13px; line-height: 19px; list-style-image: initial; list-style-position: initial; margin: 0px 0px 20px 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">4A Peak Source/Sink Drive Current</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Wide Operating Voltage Range: 4.5V to 35V</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">-40°C to +125°C Extended Operating Temperature Range</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Logic Input Withstands Negative Swing of up to 5V</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Matched Rise and Fall Times</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Low Propagation Delay Time</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Low, 10μA Supply Current</li>
<li style="background-color: transparent; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">Low Output Impedance</li>
</ul>
</div>
anandtronicshttp://www.blogger.com/profile/03310339063256716683noreply@blogger.com1tag:blogger.com,1999:blog-7184804619401792912.post-67017867895589467222013-11-06T16:58:00.001-08:002013-11-06T17:03:40.334-08:00Combined Smartphone And Tablet Factory Revenue To Exceed Entire Consumer Electronics Market This Year<div dir="ltr" style="text-align: left;" trbidi="on">
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<h4>
<span style="font-family: Arial, sans-serif; font-size: 10pt;"> </span><span style="font-size: 12pt; line-height: 14.25pt;"> In a dramatic sign of how consumer tastes have shifted to
new, more exciting wireless products, global factory revenue for smartphones
and tablets this year will rise to become larger than revenue for the entire
consumer electronics (CE) market—the first time this has ever occurred.</span></h4>
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Worldwide original equipment manufacturer (OEM) factory
revenue for media and PC tablets and for 3G/4G cellphones—a category dominated
by smartphones—will amount to $354.3 billion in 2013, according to the
Application Market Forecast Tool (AMFT) from IHS Inc. (NYSE: IHS). <o:p></o:p></span></div>
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<span style="font-size: 12pt;"> This will be 3 percent more than the $344.4
billion for OEM factory revenue for the CE market, a broad category that
includes hundreds of product types, including televisions, audio equipment,
cameras and camcorders, video game consoles and home appliances. The
massive CE market historically has dwarfed the tablet and smartphone segment,
with CE 30 percent larger just last year.<o:p></o:p></span></div>
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</span><span style="background-position: initial initial; background-repeat: initial initial; color: black; font-size: 12pt;">The
attached figure presents the IHS history and forecast of OEM factory revenue
for all types of tablets and 3G/4G cellphones; factory revenue is defined as
the total OEM dollar value of all branded devices or equipment in a market. The
figure starts in 2007, the year that smartphone shipments surged due to Apple
Inc.’s introduction of the first iPhone. The figure also presents the boom in
revenue during 2010, the year that Apple kicked off the media tablet market
with the introduction of the initial model of the iPad.</span><span style="background-position: initial initial; background-repeat: initial initial; font-size: 12pt;"><o:p></o:p></span></div>
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"Consumer demand for smartphones and tablets has been flourishing in the
past few years while sales growth for CE products has languished in the
doldrums,” said Randy Lawson, senior principal analyst for semiconductors at
IHS. “The fact that these two product categories are on their own able to
generate more OEM factory revenue than the entire CE market illustrates the
overwhelming popularity of smartphones and tablets. Meanwhile, the CE market
has gone flat, with many of the major product types experiencing either low
growth or declines in revenue during the past six years.”<br />
<br />
“Consumers simply are finding more value in the versatility and usefulness of
smartphones and tablets, which now serve as the go-to devices for everything
from phone calls, to photography, to navigation, to media playback, to fitness
tracking. Because of this, smart mobile platforms are displacing sales of CE
products such as digital still cameras, camcorders, GPS and media players.”<br />
<br />
The mobile blitz<br />
<br />
The rise of the smartphone and tablet markets has been remarkable, with OEM
factory revenue expanding by a factor of nearly nine to $354.3 billion in 2013,
up from $41.2 billion in 2007. Revenue this year will rise by a robust 31
percent.<br />
<br />
However, the fast pace of growth is slowing, with revenue in 2014 increasing by
only 18 percent to reach $418.6 billion. And with CE factory revenue declining
in 2014, smartphones and tablets will expand their revenue lead dramatically,
rising to a 22.2 percent advantage compared to the entire consumer electronics
market. This gap will continue to widen and will reach nearly 35 percent in
2017.<br />
<br />
Consumer blues<br />
<br />
In contrast, consumer electronics OEM factory revenue has been flat during the
past few years, growing by slightly less than 1 percent from 2007 to 2013.<br />
<br />
Of the 20 distinct CE product segments tracked by IHS, 14 will suffer a decline
in their compound annual growth rates (CAGR) from 2007 through 2013. Some large
product segments like LCD TVs are seeing growth in their revenue during that
period. Even so, the CAGR for LCD TVs will be less than 10 percent,
representing a major slowdown from the 83 percent rise seen during the previous
six-year period from 2001 through 2007—the era of the global flat-panel TV
replacement wave.</span><span style="font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Arial;"><o:p></o:p></span></div>
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