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Quote from: LaserTazerPhaser on August 29, 2019, 11:31:27 pmWhat specifically is needed to determine if the core material is capable of a particular switching frequency?I can't tell the material from its look, but the construction (cylindrical design with a blue color sealed top) looks suspiciously close to those 52kHz LM2576/150kHz LM2596 module inductors.Also, why on earth do you need 100uH for a 1.4MHz boost converter? DCM is not essentially bad.
What specifically is needed to determine if the core material is capable of a particular switching frequency?
Quote from: LaserTazerPhaser on August 30, 2019, 12:15:49 amGoing to determine if they will increase efficiency, considering the load current is very small.If ripple is accepted, consider a smaller inductor and use pulse skipping mode.A CCM boost converter is never ZVS, thus parasitic capacitance of a high inductance choke can contribute quite some loss.
Going to determine if they will increase efficiency, considering the load current is very small.
Quote from: LaserTazerPhaser on August 30, 2019, 12:28:57 amWill try other values by swaping them into the board. These appear fine for the high frequency operation.They look good. Look like second sources of Vishay IHLx.
Will try other values by swaping them into the board. These appear fine for the high frequency operation.
Quote from: LaserTazerPhaser on August 30, 2019, 12:59:11 amThese are the same form factor - slightly smaller less expensive but no mention of frequency. https://lcsc.com/product-detail/New-Arrivals_COILMX-MS1040-101M_C380060.htmlWhats this formfactor called? The nice blocks of ferrite.Dunno. Without data from datasheet or curve plots, I can't tell.I don't know that the package is called. I call them Vishay IHLx.
These are the same form factor - slightly smaller less expensive but no mention of frequency. https://lcsc.com/product-detail/New-Arrivals_COILMX-MS1040-101M_C380060.htmlWhats this formfactor called? The nice blocks of ferrite.