A better IRFP260 - Page 1
Forum section: electronics / general

author: sourcecharge
author_rank: Regular Contributor
timestamp: March 18, 2018, 12:50:47 pm
content: IRFP260Datasheet:https://www.vishay.com/docs/91215/91215.pdf200V D-S40 mohm R[DS(on)]50Afully avalanched ratedDoes anybody know of a N-channel mosfet that basically is the same but with a higher D-S Voltage breakdownI want to use to in a ZVS royer induction heater circuit.thanks

author: DC1MC
author_rank: Super Contributor
timestamp: March 18, 2018, 01:01:19 pm
content: FCH041N65EFL4https://www.mouser.de/ProductDetail/ON-Semiconductor-Fairchild/FCH041N65EFL4STW70N60DM2https://www.mouser.de/ProductDetail/STMicroelectronics/STW70N60DM2Cheers,DC1MC

author: wraper
author_rank: Unknown
timestamp: March 18, 2018, 01:01:59 pm
content: Go to any big distributor website like Digikey, farnell, mouser and use parametric search in their catalog.

author: sourcecharge
author_rank: Regular Contributor
timestamp: March 18, 2018, 01:34:07 pm
content: Quote from: DC1MC on March 18, 2018, 01:01:19 pmWell they both actually have the same perimeters of what I listed but are they really the same as the IRFP260?The turn off time delay seems longer and the reverse recovery of the diode seems longer too...The thing is, I did exactly what you did, and I bought these:IPW60R037P7https://www.infineon.com/dgdl/Infineon-IPW60R037P7-DS-v02_01-EN.pdf?fileId=5546d46259d9a4bf015a5bb7bab83ca7And they were like 13 bucks a piece...and they were nothing like the IRFP260 because they couldn't even handle half the voltage spike the IRFP260 could in the ZVS royer circuit..BTW this is the circuit:https://ixquick-proxy.com/do/spg/show_picture.pl?l=english&rais=1&oiu=https%3A%2F%2Fmarkobakula.files.wordpress.com%2F2012%2F10%2Froyer_ih.png&sp=80ee3fc570aeeee5b6bd9cf601cf12cbexcept instead of the IRFP250 mosfets, I'm using IRFP260maybe someone might have had the same problem?

author: DC1MC
author_rank: Super Contributor
timestamp: March 18, 2018, 01:58:17 pm
content: Were the new mosfets driven correctly ? I really fail to see what's so special about IRFP260 that your replacement and mine shouldn't be able to handle ?!?!?Puzzeld,DC1MC

author: sourcecharge
author_rank: Regular Contributor
timestamp: March 18, 2018, 02:09:02 pm
content: Quote from: DC1MC on March 18, 2018, 01:58:17 pmWhen you say driven correctly, what does that mean?All I did was drop them directly into where the IRFP260 were in the royer circuit shown in the link above...Should I have done something extra?

author: sourcecharge
author_rank: Regular Contributor
timestamp: April 20, 2018, 09:22:59 am
content: so, I think I'm going to try these next:What do you guys think?IRFP4137https://www.infineon.com/dgdl/irfp4137pbf.pdf?fileId=5546d462533600a401535629208b2002The point is to have a higher V(ds) so that a higher V input can be used for the heater.instead of using 2 in parallel, I'm thinking 3 should give the same current capacity and R(ds)on.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: April 21, 2018, 12:47:19 am
content: You're being way too picky for something that 1. isn't a switching application and 2. I'm guessing you have no way of verifying (i.e., an oscilloscope, and the theoretical knowledge to relate that waveform to the circuit layout and device characteristics) whether these alternatives are actually suitable or not.FWIW, it's not hard to do better than an IRFP260. They're ancient. Modern transistors are fullyfive timesimproved in all characteristics! This makes them much more prone to parasitic oscillation. This circuit characteristically uses linear range operation, briefly but nonetheless.Tim