Zak28
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12th September 2019, 22:00Would it also slow down sharp unidirectional di/dt edges?3 replies | 170 view(s) -
12th September 2019, 19:31Would iron wire become hysteritic and attenuate high frequency AC if it were used as a conductor?3 replies | 170 view(s)
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12th September 2019, 19:29Most small SMT diodes dont have any charts for recovery time or di/dt.4 replies | 291 view(s)
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11th September 2019, 23:02Is a fast recovery diodes maximum reverse recovery time the same speed during its max forward current & Repetitive peak reverse voltage or is it much...4 replies | 291 view(s)
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10th September 2019, 22:06There are self oscillating half/full bridge inverters with builtin dead time and can vary frequency with simple components including a potentiometer....3 replies | 143 view(s)
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7th September 2019, 21:41Zak28 replied to a thread [SOLVED] Do The Input And Output Capacitors Effect Efficiency In Switching Regulators in Elementary Electronic QuestionsWouldn't the ideal method to reduce ESR be to break up the recommended 22uF from switcher datasheet - into 3x 10uF capacitors thereby reducing ESR?5 replies | 230 view(s)
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7th September 2019, 20:44Zak28 replied to a thread [SOLVED] Do The Input And Output Capacitors Effect Efficiency In Switching Regulators in Elementary Electronic QuestionsIs this largely due impart MLCCs being leaky?5 replies | 230 view(s)
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7th September 2019, 19:58Zak28 started a thread [SOLVED] Do The Input And Output Capacitors Effect Efficiency In Switching Regulators in Elementary Electronic QuestionsWould increasing the input and output capacitances were the load is~2mA @ 25v and input is ~8v prolong the battery life? For this switcher5 replies | 230 view(s)
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4th September 2019, 22:16Zak28 replied to a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsMost datasheets do not mention anything about the material the windings are on. That document isn't of much use for inductors which doesn't have its...44 replies | 2138 view(s)
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4th September 2019, 08:19What feedback arrangements are there without high speed opamps?2 replies | 218 view(s)
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4th September 2019, 05:40Is it fine to employ to220/247/3P MOSFETs as resistors inplace of similarly packaged planar resistors for constant loads and for switched loads? ...2 replies | 218 view(s)
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2nd September 2019, 19:01Zak28 replied to a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsThere are many ferrite formulations each with their capabilities many ferrites will become very lossy at 1200khz with slight magnetizing current. ...44 replies | 2138 view(s)
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2nd September 2019, 07:00Zak28 replied to a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsThere should be a distinct parameter or table depicting core losses as a function of magnetizing current and frequency. Currently most datasheets...44 replies | 2138 view(s)
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1st September 2019, 03:23Zak28 replied to a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsCan core losses be mitigated for 1200khz by avoiding shielded or partially shielded inductors and use higher resistance parts instead to avoid core...44 replies | 2138 view(s)
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31st August 2019, 18:19Zak28 started a thread [SOLVED] obtaining dielectric constant for of a polymer in Elementary Electronic QuestionsMeasured 0.480nF for a 8cm x 5cm area using aluminum foil tape, dielectric thickness 0.2mm. Whats the method to find dielectric constant for the...1 replies | 176 view(s)
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31st August 2019, 13:36Zak28 replied to a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsIs a 1000uH inductor with Q (from datasheet) of 40 measured at 0.796Mhz very lossy for 1200Khz operation?44 replies | 2138 view(s)
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30th August 2019, 11:06Zak28 replied to a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsIs the SRF more likely to give issues to a switching regulator than a lossy core material? Perhaps a lossy material is fine to use if its not...44 replies | 2138 view(s)
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30th August 2019, 09:47Zak28 replied to a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsMuch akin to lambda power supplies in which among other things TDK capacitors are utilized. Also TDK is a well known supplier of a vast variety of...44 replies | 2138 view(s)
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30th August 2019, 08:40Zak28 replied to a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsPerhaps the manufacturers dont prefer to maintain costly measurement equipment which must be calibrated regularly which must measure a certain...44 replies | 2138 view(s)
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30th August 2019, 08:07Zak28 replied to a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsWhat are these curve depicting? https://www.digikey.com/product-detail/en/tdk-corporation/SLF12575T-221M1R3-PF/445-174412-1-ND/5880186 It seems...44 replies | 2138 view(s)
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29th August 2019, 22:19Zak28 started a thread [SOLVED] Inductor quality value for switching regulators in Elementary Electronic QuestionsDoes an inductors quality value also mean its ferrite material will have minimal losses at the frequency at which it has highest quality value?44 replies | 2138 view(s)
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29th August 2019, 09:21The diode in the fabbed board and is PMEG3050EP which is very efficient. https://assets.nexperia.com/documents/data-sheet/PMEG3050EP.pdf Also...24 replies | 1097 view(s)
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29th August 2019, 00:07It wasn't the same frequency rather constant buzzing with periodic higher amplitude peaks however it was very low and simply holding the pcb often...24 replies | 1097 view(s)
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28th August 2019, 22:18It infact was a pulsed load ~4.5mA and with a 6.8uH inductor it must have been pulsing large currents regularly. Made an openoffice Calc...24 replies | 1097 view(s)
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28th August 2019, 16:27Does this imply CCM - a state were there is only an average current in the inductor is the least wasteful state of the boost converter?24 replies | 1097 view(s)
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28th August 2019, 09:11Peak currents cause more heating to inductors than a steady average current? Already fabbed a board with this IC and a 6.8uH shielded high...24 replies | 1097 view(s)
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28th August 2019, 07:39Zak28 started a thread [SOLVED] can inductors incur damage from fast switching in Elementary Electronic QuestionsIf a 16-18awg 1-5mH diode snubbed crossover inductor is switched with a sharp rising and falling square waveform - can it incur damage such as...1 replies | 247 view(s)
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28th August 2019, 06:58It was already posted the peak current is ~0.5A which isn't much since there are already many high frequency shielded ferrite inductors available. ...24 replies | 1097 view(s)
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27th August 2019, 11:15Is there a definitive method to measure peak current of the inductor on a fabbed board? Peak current at the inductor likely cannot be measured by...24 replies | 1097 view(s)
About Zak28
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