treez
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31st May 2020, 21:47haaving said that, the FAN7688 has incorporated features to prevent light load reverse current in the sync rects.13 replies | 422 view(s) -
31st May 2020, 16:20Hi, First you may want to consider the combination of LLC and sync rects… The main problem with synchronous rectifiers is that when the SMPS ...13 replies | 422 view(s)
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31st May 2020, 12:38Yes, here is a two tran fwd with sync rects......its a home brew sync rect circuit because off the shelf chips for this are terribly expensive....13 replies | 422 view(s)
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30th May 2020, 19:45Add 18V zeners to gate-source of fets. Add approx 6r8 resistor in return path of high side gate drive.... Add diode with cathode to switching node...7 replies | 342 view(s)
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30th May 2020, 15:54Hi, Here are some constant off time uncoupled sepics. One is a solar sepic, and regulates its input current to 2A maximum…but this gets over-ridden...22 replies | 1020 view(s)
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30th May 2020, 12:29OK, i am sure you know that VMC is a little harder than CMC, because CMC results in cancellation of one of the LC poles , since it controls the...22 replies | 1020 view(s)
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30th May 2020, 12:09treez replied to a thread DCDC module recovery from input overvoltage involves a time delay? in Power ElectronicsThanks, it is indeed straight away...ie no delay2 replies | 192 view(s)
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30th May 2020, 10:37No probs, ..and i assume you are looking into sepic instead of boost for the 3.7vin to 5.6vout spec because of interest in sepic, and also perhaps...22 replies | 1020 view(s)
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30th May 2020, 00:06FRA is probably a frequency response analyser - - - Updated - - - Eg you can get the ones by ray ridley engineering.....cost about 12k - - -...22 replies | 1020 view(s)
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29th May 2020, 23:50treez started a thread DCDC module recovery from input overvoltage involves a time delay? in Power ElectronicsHi, On page 8 of the BCM4414xD1E5135yzz DCDC module datasheet, it says that the Input overvoltage threshold is 420VDC…..and then the recovery...2 replies | 192 view(s)
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29th May 2020, 22:19treez replied to a thread Determining Value of Capacitor Between PV Panel and DC-DC Convertor. in Power ElectronicsFor the input cap.....theres no maximum....it can be as big as you like....but you mightnt want to pay too much for it...so may try to find the...7 replies | 581 view(s)
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29th May 2020, 21:4712v 1A.... You mean this kind of thing?...6 replies | 333 view(s)
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29th May 2020, 21:35I would have a zener for gate-source of the high side fet.....around 18v.....and not an TVS...and definetely not a bidi TVS You can slow things...14 replies | 736 view(s)
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28th May 2020, 22:41AN 18 from power integrations is a good app note for flyback transformer design. - - - Updated - - - How to pick number of turns in transformer...8 replies | 592 view(s)
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28th May 2020, 22:05what you could do is , one -by-one, unsolder each inductor, and have it re-connected on the end of a long twisted pair flying wire back to the pcb,...8 replies | 371 view(s)
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28th May 2020, 21:59We also see that when the LLC converter has high magnetising current, then this means that the vds capacitances get quickly discharged at the FET...13 replies | 422 view(s)
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26th May 2020, 20:24Pretty much the main point of LLC design….is to make sure that your w0 frequency is far enough away from the peak of the vout vs frequency graph so...13 replies | 422 view(s)
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26th May 2020, 19:53Hi, Well I think you are over-thinking it. Take a look at AN 4151 by fairchild The basic point about an LLC is that when you are switching at the...13 replies | 422 view(s)
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25th May 2020, 15:01treez replied to a thread Doing electronics on an office carpet (non ESD) in Elementary Electronic QuestionsThanks, but we cant control the humidity level in the office.10 replies | 521 view(s)
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25th May 2020, 13:04treez replied to a thread Doing electronics on an office carpet (non ESD) in Elementary Electronic QuestionsThanks, i think all would agree that doing electronics practical in an office with a non-ESD office carpet is just basically a joke. Unless pretty...10 replies | 521 view(s)
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25th May 2020, 11:20Thanks, compared to other cores, there is a lack of symettry, and it makes us wonder if this will have some undesireable effect?.....but yes, i can...3 replies | 266 view(s)
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25th May 2020, 11:04treez replied to a thread Doing electronics on an office carpet (non ESD) in Elementary Electronic QuestionsThanks, ive previosuly worked in production firms where electronics would pass production test.....but ESD damaged components would fail in the...10 replies | 521 view(s)
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24th May 2020, 21:42treez started a thread Doing electronics on an office carpet (non ESD) in Elementary Electronic QuestionsHi, My friend is doing electronics with no esd mats on the desks or floor or anything. Its an an office with a (non esd) office carpet. He's...10 replies | 521 view(s)
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24th May 2020, 21:38treez started a thread Relative sensitivity of various electronics components to ESD damage? in Elementary Electronic QuestionsHi, Which ones of the following electronic components are more sensitive to ESD damage than the others.? Can you rate these in order of most ESD...1 replies | 182 view(s)
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24th May 2020, 18:41Hi, The EP13 ferrite core set looks like it wont enclose the windings and give a closed magnetic circuit.....eg like an etd set would. Do you...3 replies | 266 view(s)
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21st May 2020, 21:14Hi, The ACS772 hall effect current monitor family can measure up to DC 400A, but its abs max current is DC 250A…As such, we are looking at the...3 replies | 284 view(s)
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20th May 2020, 21:00treez started a thread Dont need a super accurate, super high bandwidth In Amp... in Analog Circuit DesignHi, We wish to compare two voltages and see which is highest, and get a rough measurement of the difference. We came up with the attached circuit....6 replies | 408 view(s)
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19th May 2020, 05:56treez replied to a thread A "separated double pole switch with a single throw" ( two separate switched ccts) in Hobby Circuits and Small Projects ProblemsThanks, i mean like a DPST but the poles not serving the same circuit4 replies | 319 view(s)
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18th May 2020, 20:23Hi, The ISE1215A DCDC module , on the last page of its datasheet, has a recommended input filter which comprises an inductor at its input, with no...1 replies | 218 view(s)
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18th May 2020, 19:50treez started a thread A "separated double pole switch with a single throw" ( two separate switched ccts) in Hobby Circuits and Small Projects ProblemsHi Is there any such thing as a rocker switch which switchs two circuits from the one actuator? (whats it called?) (ie we want to switch a...4 replies | 319 view(s)
About treez
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- April 5, 1982 (38)
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