Zak28
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21st September 2019, 23:21What was meant is reducing the falling edge to keep it below the many thousands of volts it will rise to thus lowering the power dissipation of the...7 replies | 457 view(s) -
21st September 2019, 17:03Would using straight square waves on the primary, but keeping within the rated peak current damage the HEI?7 replies | 457 view(s)
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20th September 2019, 23:46Do ignition drivers typically adjust the falling edges during ordinary operation to prevent excessive back emf spikes?7 replies | 457 view(s)
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20th September 2019, 15:57Can the dwell time and period on the primary side be any duration so long as it abides by the maximum peak current? Manufacturer's Part...7 replies | 457 view(s)
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12th September 2019, 22:00Would it also slow down sharp unidirectional di/dt edges?3 replies | 256 view(s)
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12th September 2019, 19:31Would iron wire become hysteritic and attenuate high frequency AC if it were used as a conductor?3 replies | 256 view(s)
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12th September 2019, 19:29Zak28 replied to a thread [SOLVED] Diode performance specification in Elementary Electronic QuestionsMost small SMT diodes dont have any charts for recovery time or di/dt.4 replies | 422 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 | 422 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 | 230 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 | 288 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 | 288 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 | 288 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 | 2380 view(s)
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4th September 2019, 08:19What feedback arrangements are there without high speed opamps?2 replies | 253 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 | 253 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 | 2380 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 | 2380 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 | 2380 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 | 204 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 | 2380 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 | 2380 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 | 2380 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 | 2380 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 | 2380 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 | 2380 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 | 1178 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 | 1178 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 | 1178 view(s)
About Zak28
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