Easy peasy
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17th October 2019, 22:21you are referring to a cascaded buck + boost, 2 converters in one ...21 replies | 595 view(s) -
17th October 2019, 20:15it is part of the overall losses and does not lend itself to exact calculation - frequency makes a difference as does the shape of the currents...6 replies | 235 view(s)
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17th October 2019, 20:12LT8705 is a lot of bits if you just want a low power converter @ asdf44; I think the point is made - with good layout capA is not required...21 replies | 595 view(s)
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17th October 2019, 15:18cap A is there by virtue of B & C, i.e. cap A can be deleted if B & C are there ...21 replies | 595 view(s)
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17th October 2019, 09:20try searching: ...21 replies | 595 view(s)
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17th October 2019, 09:12Easy peasy replied to a thread [SOLVED] HEI primary current duration in Elementary Electronic Questionsinterestingly that IGBT has 120 ohm internal gate resistor to guarantee a slower turn on / off - it also has 1.25V Von drop at 6A ... which...14 replies | 1129 view(s)
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17th October 2019, 03:49CD4015B should do it (?) 4 stage shift register - dual - - - - Updated - - - sorry - I missed post #7 - at 2.5MHz it is futile...11 replies | 455 view(s)
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17th October 2019, 03:45Easy peasy replied to a thread [SOLVED] Calculate Capacitance Value from Smith Chart in RF, Microwave, Antennas and Opticsrespectfully - even if there is loads of resistance as there is here - 50 ohm in fact - the Smith chart tells you the reactive impedance AND...20 replies | 790 view(s)
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16th October 2019, 22:40respectfully - you not bucking or boosting from input to output... a common ground is also often assumed which this ckt cannot supply21 replies | 595 view(s)
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16th October 2019, 20:37Easy peasy replied to a thread [SOLVED] Wiring of DC fans in Series in Elementary Electronic Questionsa cheap buck converter to give to 12V for the fans is looking better and better ...20 replies | 682 view(s)
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16th October 2019, 20:34you may get the same total losses as only one fet to control and one o/p diode - plus far easier control - less time to build and get going...21 replies | 595 view(s)
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16th October 2019, 09:55Easy peasy replied to a thread [SOLVED] Wiring of DC fans in Series in Elementary Electronic QuestionsQ4 is not needed - Q3 will dissipate, Ifan * 15V so be careful there ...20 replies | 682 view(s)
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16th October 2019, 08:36Easy peasy replied to a thread Mains leaking currents causing problems in my house in Elementary Electronic QuestionsA PC psu should be designed to at least 2.5kV ac phase to o/p's if not it is a very bad PC to own a dish washer could be run thru an...46 replies | 2325 view(s)
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16th October 2019, 08:31Easy peasy replied to a thread [SOLVED] Calculate Capacitance Value from Smith Chart in RF, Microwave, Antennas and Opticshe reactive part is 77.16 ohms, this is the sum of the Xc & XL, at 205MHz it is basically all capacitive so yes = Xc20 replies | 790 view(s)
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16th October 2019, 06:55A flyback is also a buck-boost ( the original in fact ) - - - Updated - - - as is a Sepic21 replies | 595 view(s)
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16th October 2019, 06:51Easy peasy replied to a thread [SOLVED] Wiring of DC fans in Series in Elementary Electronic QuestionsR's are fine - but extra power draw / loss and no guarantee of sharing at power up where fans can and do draw more than 5x the run current - ...20 replies | 682 view(s)
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16th October 2019, 06:49Easy peasy replied to a thread [SOLVED] Calculate Capacitance Value from Smith Chart in RF, Microwave, Antennas and Opticsthe Smith chart is for a specific 10pF cap, that is clue #1, it is not explicitly shown on the Smith chart, but the 77 ohm at 205MHz gives you...20 replies | 790 view(s)
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16th October 2019, 04:09Easy peasy replied to a thread Mains leaking currents causing problems in my house in Elementary Electronic QuestionsYou could go around cutting out all the Y caps ( RFI caps that go from phase & neutral to "earth" ) inside the appliances that have them - ...46 replies | 2325 view(s)
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16th October 2019, 04:00Easy peasy replied to a thread [SOLVED] Wiring of DC fans in Series in Elementary Electronic Questionsa 5W 16V zener across each fan will be the way to go, else a buck converter to 15V to run both of them in //.20 replies | 682 view(s)
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16th October 2019, 03:57CMOS gate parts can do this easily @ 2.5MHZ look up the CD4000 series - there should be a shift register type part that will do it in 16...11 replies | 455 view(s)
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16th October 2019, 03:55boost converter usually has low side drive to the fet which is easier, buck converter needs a level shift driver or a P channel fet - more...21 replies | 595 view(s)
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16th October 2019, 03:52Easy peasy replied to a thread [SOLVED] Calculate Capacitance Value from Smith Chart in RF, Microwave, Antennas and OpticsThe smith chart for that cap shows you that at 205MHz it is 10pF ( 77 ohm ) and 50 ohm resistive ...20 replies | 790 view(s)
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15th October 2019, 10:00the noise flows from right to left - ideally the CM caps need to be on the LHS ( left had side ) in order to get a CM LC filter - this can...3 replies | 181 view(s)
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15th October 2019, 08:34bigger caps = shorter current pulse = higher rms current draw = more heating in diodes and wires ... 45V, 10A schottky a good idea if pk...10 replies | 632 view(s)
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15th October 2019, 00:13Is a round-a-bout way of saying there are proximity losses in the copper wdgs associated with the windings - these losses are lower for higher...6 replies | 235 view(s)
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15th October 2019, 00:08better to have a pwm buck converter drive the heater from the batteries such that there are no sudden changes in the battery voltage OR: drive...3 replies | 185 view(s)
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11th October 2019, 01:34Easy peasy replied to a thread Closed-loop Stable for Negative Phase Margin? in Analog Circuit DesignThe bode blot requires that you consider the 1st crossing of the gain plot, not any later ones, if there is phase margin at the 1st crossing, it...8 replies | 660 view(s)
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11th October 2019, 01:29there is a fair chance your led will eventually die if subjected to unlimited current flow pulses ... opto's turn off slowly due to carriers stuck...11 replies | 548 view(s)
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11th October 2019, 01:22welcome to the world of RFI ...3 replies | 285 view(s)
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11th October 2019, 01:20Easy peasy replied to a thread Film capacitor failed in flyback smps at high temperature? in Power Electronicshi temp = expansion of either type of cap = end termination failure = cap goes low capacitance ....5 replies | 455 view(s)
About Easy peasy
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- founder MagnetPowerNZ Ltd
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- engineer
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