treez
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23rd June 2019, 20:56Hello, Do you know why this LTspice simulation of a synchronous 2 transistor forward converter using LTC3705 and LTC3706 won’t even start switching...2 replies | 110 view(s) -
23rd June 2019, 18:02treez replied to a thread Do you know what is likelihood of occurrence of tolerance extremes of L6564? in Power Electronicsits when its set up in fixed off time mode...3 replies | 135 view(s)
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23rd June 2019, 15:26treez started a thread Do you know what is likelihood of occurrence of tolerance extremes of L6564? in Power ElectronicsHi, On page 11 of L6564 datasheet is paramerter V(ZCDT) ("triggering voltage") Do you know how likely the 0.5v or 0.9v parts would be to occur in...3 replies | 135 view(s)
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23rd June 2019, 10:14coaxial probe is just a piece of coaxial cable, with a BNC connector on one end, and the other end you splay out to get you the ground and centre...18 replies | 569 view(s)
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23rd June 2019, 10:10Thanks re-installing firefox did the trick4 replies | 234 view(s)
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23rd June 2019, 09:07treez replied to a thread Loop Compensation Characteristics with Degraded parts in Boost PFC. in Power ElectronicsYou may run feedback loop measurements...then imitate a degraded ecap by putting in a smaller one with a resistor in series ...then repeat and see...5 replies | 178 view(s)
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23rd June 2019, 08:38thanks but i find it doesnt work....and when i remove the "s" it just automatically puts it back in there4 replies | 234 view(s)
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23rd June 2019, 00:52Hi , Do you know why access to this website (electronics degree guidance) has recently been blocked?..at least it is with firefox or explorer...4 replies | 234 view(s)
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22nd June 2019, 21:04treez replied to a thread Saturation current of coupled inductor used in flyback smps in Power ElectronicsThanks, heck sorry, i missed it totally. I hoep this lot can be deleted....i thought id found a dodgy datasheet3 replies | 117 view(s)
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22nd June 2019, 20:02i think OP has problem with "pickup" in his scope lead, as many others here have suggested. You can use a coaxial probe (you have to make it...18 replies | 569 view(s)
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22nd June 2019, 19:51treez replied to a thread Trying to build an LED Driver which will run with Vehicle Battery in Power Electronicsyou sometimes have vout = 2.9v sometimes vout is 12v Your vin is 10 to 14v So if i was you i would use a buckboost or coupled sepic5 replies | 255 view(s)
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22nd June 2019, 19:45here is some stuff on the double boost as mentioned by EasyPeasy above7 replies | 297 view(s)
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22nd June 2019, 19:41treez started a thread Saturation current of coupled inductor used in flyback smps in Power ElectronicsHello We wish ti use this coupled nductor in a small flyback converter. Do you know what is the saturation current. The 220uH version....3 replies | 117 view(s)
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14th June 2019, 06:19treez started a thread Make component in LTspice in PCB Routing Schematic Layout software and SimulationHi Do you know how i can make a single component out of the attached LED string?...we are using loads of them in the sim and its taking ages to run.1 replies | 123 view(s)
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11th June 2019, 06:19200W Offline LED driver, 240VAC input. Done with Power factor corrected Boost then LLC. Output 250V, 0.8A Efficiency would be 93%....but do you...2 replies | 148 view(s)
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9th June 2019, 19:41treez replied to a thread 500W-1kW offtheshelf offlien SMPS's with no fan (240VAC) in Power ElectronicsThanks, they have all got open grills in the top of the enclosure. It would be interesting to see how totally enclosed power supplies compare...eg...4 replies | 227 view(s)
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9th June 2019, 10:41treez started a thread Thermal vias in pads..plated over in PCB Routing Schematic Layout software and SimulationHi, Our PCB manufacturer offers us thermal vias in dpak pads, and plated over on top and bottom sides. They are filled with epoxy. How come the air...4 replies | 237 view(s)
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8th June 2019, 22:24yes your panels could give up to 88.7vout, so you need a buck battery charger to go between the solar panel and the battery. So you just need a step...5 replies | 259 view(s)
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8th June 2019, 22:16if you want you can use an RT6208 based buck converter. The datasheet tells you how to set it up.6 replies | 301 view(s)
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8th June 2019, 18:39treez started a thread 500W-1kW offtheshelf offlien SMPS's with no fan (240VAC) in Power ElectronicsHi We would like to see examples of offtheshelf SMPS's of 500W up to 1kW that have no fan cooling, to look at the sizings. By "no fan", we mean...4 replies | 227 view(s)
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7th June 2019, 20:54Hi, Just got the JD for a electronics job making drinks machines. Are the power supplies likely to be bought in from China, or they...1 replies | 349 view(s)
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4th June 2019, 19:45treez replied to a thread Fault mode of synchronous recrifier IC with BCM flyback in Power Electronicsits in BCM but there is a minimum on time, so in certain situations, it will be in DCM.3 replies | 260 view(s)
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2nd June 2019, 14:04treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks, by the way, the following circuit also works fine, but we dont want a bulky opto in there as we dont need the isolation. (ltspice and pdf...14 replies | 750 view(s)
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2nd June 2019, 11:01treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks, On the previous board, the original circuit of the top post (without optocouplers) worked absolutely fine, but we did not have the bridge...14 replies | 750 view(s)
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1st June 2019, 22:00treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks to all, what about the following adjustment to the DALI receiver circuit?…now we have reduced the gain of the first NPN stage, making it a...14 replies | 750 view(s)
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1st June 2019, 20:51here is an ltspice sim of a current regulator that you could find useful6 replies | 397 view(s)
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1st June 2019, 19:45treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks, No optocouplers. There are no other receivers on the dali bus. The 60W SMPS has an earth connection, but does have full isolation between...14 replies | 750 view(s)
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1st June 2019, 13:26treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignYes....here is a scope shot of what the noise looks like at RA3.........top is what we should see, bottom is what we get. The micro isnt responding...14 replies | 750 view(s)
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1st June 2019, 13:11treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks, We can actually put a 1206 resistor across the DALI bus, to give the lower load resistance (there is a not-fitted 1206 footprint there,...14 replies | 750 view(s)
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1st June 2019, 12:31treez started a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignHi, We have a DALI communication setup. To be brief, DALI is basically square wave transmissions at 1200Hz. A DALI bus is pulled down and released...14 replies | 750 view(s)
About treez
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- April 5, 1982 (37)
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- football, cycling
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