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			<td><h1>Switching Loss</h1></td>
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			<div id="results_count">99 Threads found on edaboard.com: <strong>Switching Loss</strong></div>
		
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread365608.html" rel="nofollow">Calculating the efficicency of synchronous buck converter in simulink</a></h2></div>
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			<div class="content_text">Have you got the various <strong>loss</strong> terms in analytical (or 
vector) form with appropriate indices? 

Efficiency is 1 minus the sum of all ineffiencies (<strong>loss</strong>
terms). Conduction <strong>loss</strong> in each switch for its duty
factor, which in turn follows step-down ratio; <strong>switching</strong>
<strong>loss</strong>es which depend on frequency, VIN and VOUT; (...)</div> 
			<div class="content_info">
				&nbsp;&nbsp; Power Electronics :: 03-18-2017 17:34 :: dick_freebird :: Replies: <strong>2</strong> :: Views: <strong>360</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread364892.html" rel="nofollow">MOSFET Dynamics Drives me Crazy !!</a></h2></div>
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			<div class="content_text">I am using MOSFET as switch and I want to find the <strong>switching</strong> power <strong>loss</strong>. 
..you should read the article on high speed mosfet drive by laszlo balogh.....

- - - Updated - - -

 
...pages 4 to about page 10 or so

</div> 
			<div class="content_info">
				&nbsp;&nbsp; Power Electronics :: 02-28-2017 18:01 :: treez :: Replies: <strong>7</strong> :: Views: <strong>497</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread363417.html" rel="nofollow">Selecting switching frequency for offline flyback converter</a></h2></div>
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			<div class="content_text">Does this operating frequency has anything to do with creating EMI??
Yes, in offline designs, the conducted emissions graphs start at you are better off choosing a <strong>switching</strong> frequency below 150khz.
..then again, for the sake of <strong>switching</strong> <strong>loss</strong> reduction, its best to stay below 150khz anyway with an offline flyback.
I am</div> 
			<div class="content_info">
				&nbsp;&nbsp; Power Electronics :: 01-20-2017 19:23 :: treez :: Replies: <strong>10</strong> :: Views: <strong>820</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread360708.html" rel="nofollow">heat dissipated in mosfet and required copper</a></h2></div>
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			<div class="content_text">Crrs @ 24V doesn't give the effectiv capacitance, due to non-linear characteristic. You better use plateau charge from Qg graph. Expectable rise/fall time is about 100 ns according to my calculation, <strong>switching</strong> <strong>loss</strong> about 0.5 W, still moderate. 

Junction-to-ambient thermal resistance of 62 K/W demands for heat sink, e.g. a small PCB mounted type </div> 
			<div class="content_info">
				&nbsp;&nbsp; Thermal Management :: 11-01-2016 17:57 :: FvM :: Replies: <strong>4</strong> :: Views: <strong>507</strong>
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								<div class="result_box">
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread350011.html" rel="nofollow">help me design an ultra low power SAR ADC</a></h2></div>
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			<div class="content_text">This 101 nW is consumed for 140kSps sampling rate? Or it is DC power?
If first case You have to interest with <strong>switching</strong> algorithm optimisation, If second, probably You have some stupid leakage on switches.</div> 
			<div class="content_info">
				&nbsp;&nbsp; Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 02-01-2016 18:51 :: Dominik Przyborowski :: Replies: <strong>3</strong> :: Views: <strong>733</strong>
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			<div class="content_header">
				<div class="content_title"><h2><a href="http://www.edaboard.com/thread349159.html" rel="nofollow">Design &quot;Soft switching&quot; into a MOSFET full bridge.</a></h2></div>
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			<div class="content_text">My application:

124819

This is an idealize full bridge switch mode DC-DC boost power supply as I know it (with a MOSFET full bridge drive and full bridge rectifier). The power supply output is 300 volts at 1 amp nominal and 2 amps peak output. Power supply input is 12 volts at a necessary amount of current.

Under th</div> 
			<div class="content_info">
				&nbsp;&nbsp; Power Electronics :: 01-06-2016 19:50 :: Reactor89 :: Replies: <strong>10</strong> :: Views: <strong>1029</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread341463.html" rel="nofollow">[Moved]: High-speed level shifter or level converting latch or level converting FF</a></h2></div>
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			<div class="content_text">If this is 3GHz continuous / balanced (-ish) <strong>switching</strong>
then it could be as simple as a blocking cap and a bias
resistor network on the other side. Zero delay and trivial
<strong>loss</strong> are upsides, the need for some preamble period for
the bias network to stabilize could be an application 
issue. 

Does it really need anything more elaborate, and if so,
why?</div> 
			<div class="content_info">
				&nbsp;&nbsp; Analog Circuit Design :: 07-23-2015 17:12 :: dick_freebird :: Replies: <strong>5</strong> :: Views: <strong>899</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread337435.html" rel="nofollow">High VOLTAGE Switching input Tantalum Capacitor</a></h2></div>
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			<div class="content_text">HI

I am going to build a High voltage <strong>switching</strong> Power supply using IC MAX1771. I have a doubt regarding the decoupling tantalum capacitor which is placed at the point where 12V is coming in to the board before it goes to inductor. The recommended value is 100uF,35v tantalum but what if i use a 100uf, 16v TANTALUM CAPACITOR in its place as it is </div> 
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				&nbsp;&nbsp; Power Electronics :: 05-12-2015 10:27 :: jimmykk :: Replies: <strong>7</strong> :: Views: <strong>572</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread336331.html" rel="nofollow">Lock detection circuit in adpll</a></h2></div>
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			<div class="content_text">Capture time increases as SNR decreases among other design factors, so predicting when locked when <strong>switching</strong> often requires a lock detector.
If signal drops out due to fading <strong>loss</strong>, lock detector is needed. If using simple PLL synthesis with clean signals, it may not be needed except for fault detection reasons.</div> 
			<div class="content_info">
				&nbsp;&nbsp; ASIC Design Methodologies and Tools (Digital) :: 04-24-2015 04:57 :: SunnySkyguy :: Replies: <strong>2</strong> :: Views: <strong>644</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread335325.html" rel="nofollow">Switching between Input (AC) and Battery for TP4056 CC-CV Board</a></h2></div>
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			<div class="content_text">Thanks for the quick reply Skyguy. Much appreciated. Will design a simple CC ckt and see if it works.

BTW with the <strong>switching</strong> ckt, is the configuration of the P channel MOSFET good? Or will I need a pull down resistor from the gate to ground? Overall' would the ckt work with the <strong>switching</strong> the way I want? Suggest modifications if any. Thanks!</div> 
			<div class="content_info">
				&nbsp;&nbsp; Analog Circuit Design :: 04-07-2015 15:18 :: deepak4you :: Replies: <strong>3</strong> :: Views: <strong>1550</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread332293.html" rel="nofollow">Does UK mains have a fault mode where a single whole mains half cycle is just absent?</a></h2></div>
			</div>
			<div class="content_text">Something like that was trialled to automatically operate street lighting many years ago. A detector circuit in the lamp controller looked for a brief DC offset in the mains caused by one or more missing half cycles.  It think it was abandoned quickly for several reasons, primarily that it upset filter circuits and the combined effect of many (re)c</div> 
			<div class="content_info">
				&nbsp;&nbsp; Elementary Electronic Questions :: 02-18-2015 20:23 :: betwixt :: Replies: <strong>6</strong> :: Views: <strong>650</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread329496.html" rel="nofollow">choose the most appropriate dc dc</a></h2></div>
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			<div class="content_text">Flyback is ok, though you will get more <strong>switching</strong> <strong>loss</strong> and rcd clamp <strong>loss</strong>. If you can tightly couple pri and sec then your <strong>loss</strong>es of these will be much less.
Flyback ok because your I(out )  is low

Half bridge can be problematic...read the LM5039 datasheet to see this problem.
two tran forward....bad because you need hi (...)</div> 
			<div class="content_info">
				&nbsp;&nbsp; Analog Circuit Design :: 02-05-2015 21:57 :: treez :: Replies: <strong>8</strong> :: Views: <strong>1255</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread328164.html" rel="nofollow">RDS(on)  minimization</a></h2></div>
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			<div class="content_text">If RDS(on) in <strong>switching</strong> power supplies is the main source of power <strong>loss</strong>, why cant we connect many MOSFETs in parallel in order to minimize the resistance?</div> 
			<div class="content_info">
				&nbsp;&nbsp; Power Electronics :: 12-08-2014 14:16 :: GeoAVR :: Replies: <strong>1</strong> :: Views: <strong>653</strong>
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								<div class="result_box">
			<div class="content_header">
				<div class="content_title"><h2><a href="http://www.edaboard.com/thread325751.html" rel="nofollow">IGBT and reverse diode switching losses in MATLAB?</a></h2></div>
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			<div class="content_text">Hi, if SIMULINK allows you to measure the current and voltage for the IGBT (Ic and Vce) are we able to compute the <strong>switching</strong> <strong>loss</strong> for the IGBT? Thanks.</div> 
			<div class="content_info">
				&nbsp;&nbsp; Power Electronics :: 10-29-2014 14:59 :: Shinnster :: Replies: <strong>0</strong> :: Views: <strong>1158</strong>
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			<div class="content_header">
				<div class="content_title"><h2><a href="http://www.edaboard.com/thread318541.html" rel="nofollow">Flyback Zero Voltage Switching</a></h2></div>
			</div>
			<div class="content_text">Hi all,
Designed Flyback Topology based SMPS.Now want to convert SMPS in to Zero Voltage <strong>switching</strong> Flyback  SMPS.
How to design ZVS Flyback Converter?

Thanks & waiting For Knowledge Enhancement,:thinker:
Sachin</div> 
			<div class="content_info">
				&nbsp;&nbsp; Power Electronics :: 07-01-2014 07:33 :: SACHIN C :: Replies: <strong>2</strong> :: Views: <strong>813</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread318122.html" rel="nofollow">What is difference between ultrafast IGBT and Field stop IGBT???</a></h2></div>
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			<div class="content_text">That would depend a lot on what kind of chop rate you 
are considering, and what conduction <strong>loss</strong> vs <strong>switching</strong>
<strong>loss</strong> trade you are happy with. I think a little spreadsheet
work would help you with that decision process. You can
probably find something good enough on the Web, to make
a start.</div> 
			<div class="content_info">
				&nbsp;&nbsp; Power Electronics :: 06-25-2014 15:45 :: dick_freebird :: Replies: <strong>4</strong> :: Views: <strong>862</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread317297.html" rel="nofollow">Driver for high power IGBT</a></h2></div>
			</div>
			<div class="content_text">Driving high power IGBT's is not like driving a Relay.  There are different design rules for 3rd and 4th generation IGBT's where Rg affects speed and power dissipation due to high gate load charges during <strong>switching</strong>.  The best driver is a faster low impedance driver during <strong>switching</strong> time to minimize transient power <strong>loss</strong> during (...)</div> 
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				&nbsp;&nbsp; Power Electronics :: 06-10-2014 12:24 :: SunnySkyguy :: Replies: <strong>8</strong> :: Views: <strong>1285</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread316493.html" rel="nofollow">Switch-off switching loss in Active Clamp Forward converter?</a></h2></div>
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			<div class="content_text">Page 7 (LHS) of the following (below) article is totally wrong, do  you agree?

It says that regarding active clamp forward converters, ?With sufficiently fast gate drive,
the turn off of Q1 can be virtually <strong>loss</strong>less.? (Q1 being the main power mosfet).

This is impossible,  current cannot suddenly go to zero in Q1  and cannot immediately diver</div> 
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				&nbsp;&nbsp; Power Electronics :: 05-26-2014 13:05 :: treez :: Replies: <strong>1</strong> :: Views: <strong>665</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread316023.html" rel="nofollow">designing switching supply, variable 15-0-15, fixed +5V +3.3V</a></h2></div>
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			<div class="content_text">Hello everyone! It's good to be back after a long time :)

I need to design a nice <strong>switching</strong> power supply that will be used to power my electronic projects. I need a variable 15-0-15 dual voltage with per-line regulation (for example I want to be able to set -4V and +13V), and two fixed voltages of +5V and +3.3V (the 3.3V might be easily achievab</div> 
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				&nbsp;&nbsp; Power Electronics :: 05-18-2014 19:34 :: T3STY :: Replies: <strong>24</strong> :: Views: <strong>2492</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread315648.html" rel="nofollow">Measuring MOSFET Switching Loss with Tek TPS2PWR1 Power Analysis Application Software</a></h2></div>
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			<div class="content_text">Hello and Well-Wishes To All, 

I have designed and built a load resonant full bridge inverter that operates at 85kHz. The inverter is to be used in multi-kilowatt inductive power transfer (Please see attached pictures and video links below for a sample of the set-up). I?m presently in the process of characterizing the inverter?s <strong>switching</strong> <strong>loss</strong>es</div> 
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				&nbsp;&nbsp; Power Electronics :: 05-12-2014 23:31 :: bryanurbe :: Replies: <strong>0</strong> :: Views: <strong>651</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread313774.html" rel="nofollow">What topology should I use&#65311;</a></h2></div>
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			<div class="content_text">The isolated outputs are 5V/50mA and 12V/500mA.

In this case it is reasonably efficient to drop the 12V to 5V using a linear regulating IC. Your power <strong>loss</strong> is 350 mW (7 x .05), which will not generate extreme heat.

To isolate the 12V, it can come from a transformer-based <strong>switching</strong> power supply. 

Does a particul</div> 
			<div class="content_info">
				&nbsp;&nbsp; Power Electronics :: 04-14-2014 06:21 :: BradtheRad :: Replies: <strong>6</strong> :: Views: <strong>705</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread312942.html" rel="nofollow">heat sink design for mosfet</a></h2></div>
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			<div class="content_text">For power dissipated by MOSFET, <strong>switching</strong> <strong>loss</strong> and conduction <strong>loss</strong> should be taken into account. May I know should I take snubber <strong>loss</strong>es into account as well as my circuit has the snubber circuit? Thanks</div> 
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				&nbsp;&nbsp; Power Electronics :: 04-01-2014 07:02 :: sunnycfc9 :: Replies: <strong>2</strong> :: Views: <strong>662</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread309607.html" rel="nofollow">DC/DC converter for more output and low power?</a></h2></div>
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			<div class="content_text">I've Designed one recently. I got 96%. The points are, make your transformer good, make a stable HF oscillation. And use more FETs than required. That will reduce <strong>switching</strong> <strong>loss</strong>.</div> 
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				&nbsp;&nbsp; Analog Circuit Design :: 02-14-2014 09:27 :: Mithun_K_Das :: Replies: <strong>6</strong> :: Views: <strong>615</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread308885.html" rel="nofollow">RF Switch for sender and receiver</a></h2></div>
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			<div class="content_text">Different switch technlogies are available, to be chosen dependent on the yet unclear specifications (power level, acceptable insertion <strong>loss</strong>, required isolation, <strong>switching</strong> speed).</div> 
			<div class="content_info">
				&nbsp;&nbsp; RF, Microwave, Antennas and Optics :: 02-03-2014 21:12 :: FvM :: Replies: <strong>2</strong> :: Views: <strong>480</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread308699.html" rel="nofollow">Rotery Enoder and Stepper Motor Problem</a></h2></div>
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			<div class="content_text">Unfortunately you are only posting scarce code snippets, you we can't see what you are exactly doing.

Viewing these snippets, I get the impression that you are operating the stepper motor completely wrong. E.g. <strong>switching</strong> the stepper off is a no-no because it most likely causes <strong>loss</strong> of position.

I think, Alexander's game of questions and answe</div> 
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				&nbsp;&nbsp; Microcontrollers :: 02-01-2014 13:14 :: FvM :: Replies: <strong>31</strong> :: Views: <strong>1531</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread306497.html" rel="nofollow">Active clamp forward converter has reduced switch_on and switch_off losses?</a></h2></div>
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			<div class="content_text">Hello,
The Active clamp forward can certainly be arranged to have zero switch_on  <strong>switching</strong> <strong>loss</strong> (by suitable sizing of the leakage inductance).

Since at switch off, much of the FET drain current is diverted into the clamp capacitor, (ie rather than it going through the drain_source of the FET) can we also say that the switch_off (...)</div> 
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				&nbsp;&nbsp; Power Electronics :: 12-31-2013 17:49 :: treez :: Replies: <strong>0</strong> :: Views: <strong>531</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread302239.html" rel="nofollow">Which voltage regulator is better to use?</a></h2></div>
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			<div class="content_text">Both LM317 and 7812 are linear voltage regulators.Both will do the job and may require decent size heat sink to dissipate the heat generated during regulation process.
I would use <strong>switching</strong> regulators instead of linear ones,like LM2576 they out perform linear ones in every aspect.
Try Google first,and you will tones of information about the voltage</div> 
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				&nbsp;&nbsp; Microcontrollers :: 10-31-2013 02:55 :: liteon :: Replies: <strong>3</strong> :: Views: <strong>535</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread299638.html" rel="nofollow">problems using long metal wire</a></h2></div>
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			<div class="content_text">Other than those that are listed here, Noise coupling can be a big issue for an analog block driving the long line till the destination. If the long line is passing near any digital <strong>switching</strong> blocks, then it would affect the signal on the line. For this the driving block should have good drive strength i.e. low impedance.</div> 
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				&nbsp;&nbsp; Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 10-01-2013 06:42 :: nitishn5 :: Replies: <strong>4</strong> :: Views: <strong>635</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread298027.html" rel="nofollow">DCM flyback and switching loss at turn-off</a></h2></div>
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			<div class="content_text">Hello,

The <strong>switching</strong> <strong>loss</strong> of a DCM flyback is virtually zero at turn on (because theres no current flowing)...........however, it has high <strong>switching</strong> <strong>loss</strong> at turn off.......supposing I add an RCD snubber to the fet...............can I confirm that this doesn't  make for overall efficiency increase, but does make (...)</div> 
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				&nbsp;&nbsp; Power Electronics :: 09-05-2013 12:24 :: treez :: Replies: <strong>5</strong> :: Views: <strong>1593</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread297930.html" rel="nofollow">Transconductance of FET needed for switching loss calculation.</a></h2></div>
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			<div class="content_text">If you already have a circuit where you can measure actual <strong>switching</strong> times, you can measure <strong>switching</strong> <strong>loss</strong>es directly. If you don't have the circuit, you most likely don't know the exact <strong>switching</strong> times and can't calculate <strong>loss</strong>es.</div> 
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				&nbsp;&nbsp; Power Electronics :: 09-04-2013 18:21 :: FvM :: Replies: <strong>6</strong> :: Views: <strong>837</strong>
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			<div class="content_text">Hi Dynamag and welcome to EDABoard,

For measuring You can use Hall sensor ACS712, A1302, or any other similar. Power supply for circuit should be done using <strong>switching</strong> tech, 7812, 7805 is linear and will make some power <strong>loss</strong> according to circuit design and needs.


Best regards,
Peter</div> 
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				&nbsp;&nbsp; Power Electronics :: 09-03-2013 10:42 :: tpetar :: Replies: <strong>3</strong> :: Views: <strong>635</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread290546.html" rel="nofollow">switching MOSFET power dissipation calculator</a></h2></div>
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			<div class="content_text">Hi

Is there an online HTML or an Excel calculator to calculate power <strong>loss</strong>/dissipation of <strong>switching</strong> MOSFETs in BUCK synchronous DC/DC converters?
I found formulas online, and in datasheets, but those are useless in practice as they only explain what is happening, but there are always 1-2 unexplained or not provided variables. Without knowing the</div> 
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				&nbsp;&nbsp; Professional Hardware and Electronics Design :: 06-06-2013 23:45 :: buenos :: Replies: <strong>1</strong> :: Views: <strong>1731</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread289834.html" rel="nofollow">SPDT switch required</a></h2></div>
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			<div class="content_text">Hi all,

I need an SPDT or a SPST switch (Absorptive) which has the following requirements.

Freq : 9 GHz  to 10 GHz

insertion <strong>loss</strong> : < 1 dB

<strong>switching</strong> speed : 100ns (Maximum)

Power handling : 5 Watt CW.

Connectorized : SMA both sides

I am searching for the part for a long time ,Please help me out if anyone knows the part is avail</div> 
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				&nbsp;&nbsp; RF, Microwave, Antennas and Optics :: 05-29-2013 09:50 :: shashy.br :: Replies: <strong>2</strong> :: Views: <strong>783</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread285585.html" rel="nofollow">switching losses &amp; Rectifier diode losses?</a></h2></div>
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			<div class="content_text">Hello,

what is the formula for MOSFET <strong>switching</strong> <strong>loss</strong>es & Rectifier diode <strong>loss</strong>es? and please explain me how to calculate them?
Hi Madhu.b
<strong>switching</strong> <strong>loss</strong> of a mosfet will given by :
1/T integral over Rdson*Id^2 dt from zero up to ton .   and fo a diode : 1/T  integral over Vdon*id^2 dt 
Best Wishes 
Goldsmith</div> 
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				&nbsp;&nbsp; Analog Circuit Design :: 04-13-2013 01:27 :: goldsmith :: Replies: <strong>4</strong> :: Views: <strong>1189</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread282293.html" rel="nofollow">dc-dc scaling of 0-18V to 0-5V</a></h2></div>
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			<div class="content_text">You can use linear dropout regulators, they r low cost and reliable. Yes, they r <strong>loss</strong>y and can be realized using an op-amp. Search google with keyword "op-amp regulator" and u get 100's of circuits on images click.
But if ur application is battery powered or u r concerned with power <strong>loss</strong>, then u can go for buck dc-dc <strong>switching</strong> regulators. U (...)</div> 
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				&nbsp;&nbsp; Analog Circuit Design :: 03-07-2013 10:22 :: ashugtiwari :: Replies: <strong>1</strong> :: Views: <strong>690</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread279815.html" rel="nofollow">Mosfet gate driver current calculation</a></h2></div>
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			<div class="content_text">In order to calculate the gate current for driving the gate of a MOSFET by PWM at ~40Khz, I use the formula for peak current "Ip" located on the 4th page of the publication question is what is a systematic way of calculating Ton term in that formula? A smaller Ton results in lower <strong>switching</strong> <strong>loss</strong>,</div> 
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				&nbsp;&nbsp; Analog Circuit Design :: 02-10-2013 04:55 :: h@ro :: Replies: <strong>2</strong> :: Views: <strong>2138</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread279164.html" rel="nofollow">whether I use Linear or a Switching regulator.</a></h2></div>
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			<div class="content_text">Hi;
Since this is a battery energized system and power efficeincy is important using a <strong>switching</strong> regulator might be a more reosnable solution. It will increase the efficiency (less power <strong>loss</strong> on regulator). And this TI device can boost also, it means when your battery goes down to ie 3.1V can still supply 3.3V to your devices. But an LDO can do tha</div> 
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				&nbsp;&nbsp; Analog Circuit Design :: 02-03-2013 13:56 :: emresel :: Replies: <strong>8</strong> :: Views: <strong>1033</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread278399.html" rel="nofollow">30-25 volt converter ic other than 7805</a></h2></div>
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			<div class="content_text">7805 is not exactly a voltage converter.

what are you actually trying to do ? Just interfacing a 30v <strong>switching</strong> signal to uC input pins ? If so, wouldn't a simple resistive divider + zener protection be enough ?</div> 
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				&nbsp;&nbsp; Microcontrollers :: 01-28-2013 02:22 :: kripacharya :: Replies: <strong>6</strong> :: Views: <strong>743</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread275888.html" rel="nofollow">How  can obtain   higher  efficeny on  a boost smps</a></h2></div>
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			<div class="content_text">What is the output power? What is the <strong>switching</strong> frequency?

For the MOSFET, you have three types of <strong>loss</strong>es involved: conduction <strong>loss</strong>, <strong>switching</strong> <strong>loss</strong> and gate charge <strong>loss</strong>. To decrease conduction <strong>loss</strong> you need to use a MOSFET or a combination of MOSFETs will lower overall (...)</div> 
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				&nbsp;&nbsp; Power Electronics :: 12-31-2012 20:17 :: Tahmid :: Replies: <strong>12</strong> :: Views: <strong>883</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread265195.html" rel="nofollow">Sizing three phase inverter's IGBT</a></h2></div>
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			<div class="content_text">Hi,
1. Need to consider RMS values. These values are also used for <strong>switching</strong> <strong>loss</strong> calculation; Peak values may be limited by control strategies and protective devices for faults.
2. After <strong>loss</strong>, and heatsink/cooling solution calculation, estimate IGBT temperature; if close to 80C, use this value. Anyway, using this value allow a headroom for (...)</div> 
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				&nbsp;&nbsp; Power Electronics :: 09-09-2012 15:14 :: iop95 :: Replies: <strong>2</strong> :: Views: <strong>1265</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread265018.html" rel="nofollow">SPDT ac switch for power analog signal -  implementation advice</a></h2></div>
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			<div class="content_text">For low <strong>loss</strong> <strong>switching</strong> with the said voltage and current level, mechanical relays seem to be best suited. There are also small SMD versions. RF capable solid state relays are of course an option, but will most likely involve higher switch resistance and also crosstalk by switch capacitance.</div> 
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				&nbsp;&nbsp; Analog Circuit Design :: 09-07-2012 14:50 :: FvM :: Replies: <strong>3</strong> :: Views: <strong>545</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread264264.html" rel="nofollow">Suitable IGBT for motor drive</a></h2></div>
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			<div class="content_text">Hello,

I would go for mosfet as in your voltage range the voltage drop across the component (due to rdson) is much lower compared to an IGBT.   Also the <strong>switching</strong> <strong>loss</strong> for mosfet is less.  All will result in less cooling requirements. 

 You can control inrush current by taking load current into account.  It will reduce stress on  batttery, lo</div> 
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				&nbsp;&nbsp; Power Electronics :: 08-31-2012 19:10 :: WimRFP :: Replies: <strong>8</strong> :: Views: <strong>911</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread263369.html" rel="nofollow">How to understand switching frequency</a></h2></div>
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			<div class="content_text">Resonant <strong>switching</strong> high voltage IGBT circuits are usually working below 10 kHz based on <strong>switching</strong> <strong>loss</strong> considerations, hard <strong>switching</strong> circuits in a low kHz range, just to shine a light on state-of-the-art. You didn't however tell about your <strong>switching</strong> frequency constraints, so it's hard to determine if the (...)</div> 
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				&nbsp;&nbsp; Power Electronics :: 08-21-2012 14:57 :: FvM :: Replies: <strong>19</strong> :: Views: <strong>1158</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread262296.html" rel="nofollow">Some doubts about RCD snubber</a></h2></div>
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			<div class="content_text">1) If snubber is to protect the <strong>switching</strong> transistor, then if the max voltage during turnoff of device is lesser than the Max VDS rating of mosfet, do we still need snubber?
2) If we implement snubber at primary winding of flyback transformer, do we need to add protection across the <strong>switching</strong> mosfet?
3) While designing snubber if we calculate pea</div> 
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				&nbsp;&nbsp; Power Electronics :: 08-09-2012 06:24 :: I_think :: Replies: <strong>6</strong> :: Views: <strong>1255</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread248176.html" rel="nofollow">Question on properties of PFET for switching speed</a></h2></div>
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			<div class="content_text">Hello,

I'm looking to use a PFET as a switch.  I want to be able to switch a small ac signal (~20 MHz) that is connected to the source with an appropriate DC bias to ensure the PFET remains on.  I've tested with some general purpose PFETs and have noticed that as I go up in frequency the voltage of the ac signal begins to diminish to the point w</div> 
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				&nbsp;&nbsp; Analog Circuit Design :: 04-11-2012 15:29 :: havanna1 :: Replies: <strong>1</strong> :: Views: <strong>662</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread243044.html" rel="nofollow">difference between BJT &amp; MOSFET</a></h2></div>
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			<div class="content_text">In power electronics, the Silicon BJT is replaced by the MOSFET and IGBT.

At low voltage (say below 200V), mosfet has low on-state voltage drop and is fast.   The BJT may have even lower on-state voltage drop at higher voltage, but has poor off-<strong>switching</strong> characteristic because of the storage time, so <strong>switching</strong> <strong>loss</strong> will be higher than in (...)</div> 
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				&nbsp;&nbsp; Elementary Electronic Questions :: 03-02-2012 17:28 :: WimRFP :: Replies: <strong>1</strong> :: Views: <strong>5886</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread235175.html" rel="nofollow">IGBT Power losses calculation</a></h2></div>
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			<div class="content_text">Hi,
In some data sheets, the Eon, Eoff and Ets dissipated energies are presented in <strong>switching</strong> characteristics of a power IGBT switch.
My question, from those energy values (in mJ unit) how can calculate power <strong>loss</strong>es in terms if watts, I mean what the time to be used to get the total power <strong>loss</strong> from the total energy <strong>loss</strong> (...)</div> 
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				&nbsp;&nbsp; Analog Circuit Design :: 12-23-2011 15:03 :: wael_sal :: Replies: <strong>2</strong> :: Views: <strong>1823</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread234553.html" rel="nofollow">Gate drain capacitance value for switching loss calculation?</a></h2></div>
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			<div class="content_text">Hello would you agree that the rquation for "CGD ave" on page 4 of this is nonsense....?........

 

If vds spec was 25V, and vds off was 600V, then Cgd would be smaller  with the higher drain voltage , which is nonsense.


I am trying to calculate <strong>switching</strong> <strong>loss</strong>es for a flyback , but i am close t</div> 
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				&nbsp;&nbsp; Power Electronics :: 12-18-2011 11:37 :: grizedale :: Replies: <strong>1</strong> :: Views: <strong>921</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread234138.html" rel="nofollow">Switching loss parameter?</a></h2></div>
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			<div class="content_text">gm*RL is commonly known as the voltage gain (simplified expression) of a transistor stage. Notice that the formula is referring to Miller effect. So RL is obviously means the load resistance. 

But the relation only applies in linear operation, and thus apparently, it's introduced to the discussion without further impact. In <strong>switching</strong> operation, </div> 
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				&nbsp;&nbsp; Power Electronics :: 12-17-2011 23:29 :: FvM :: Replies: <strong>4</strong> :: Views: <strong>934</strong>
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				<div class="content_title"><h2><a href="http://www.edaboard.com/thread234158.html" rel="nofollow">Gate Drive CIRCUIT Power loss for switching FET?</a></h2></div>
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			<div class="content_text">Right, and I didn't say the bias supply provides energy when discharging the gate.  When charging up the capacitance, you draw C*V^2 from the supply.  Half of this is immediately dissipated in the driver, and half is delivered to the gate capacitance.  While discharging the gate, the 1/2CV*2 in the capacitor is dissipated in the driver again; none </div> 
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				&nbsp;&nbsp; Power Electronics :: 12-15-2011 17:04 :: mtwieg :: Replies: <strong>5</strong> :: Views: <strong>5474</strong>
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