Sanken MOSFETs - Page 1
Forum section: electronics / projects

author: ruffy91
author_rank: Regular Contributor
timestamp: April 10, 2014, 04:56:00 pm
content: Hi,I'm in the process of designing a MPPT solar charger.I have searched on digikey for suitable mosfets for the Buck-Converter and found two models from sanken. I've found the SKI06106 (http://www.semicon.sanken-ele.co.jp/ctrl/en/product/detail/SKI06106/) and DKI06186 (http://www.semicon.sanken-ele.co.jp/ctrl/en/product/detail/DKI06186/).I am a bit worried by their availability tough as digikey has only about 50 pieces of them, and no one else seems to stock them. Does anyone know if this is normal for Sanken (that they only sell directly to customers) or if these are NRND?This leads to the next problem, have a look at the datasheets, they are missing all the diagrams! I miss gate charge and capacitance in relation do gate-source and drain-source voltage. Can I trust the datasheet in the other values like RDS if even such basic things are missing? Is Sanken a reputable semiconductor company or are they just some Chinese factory?Thanks for your comments.

author: peter.mitchell
author_rank: Super Contributor
timestamp: April 10, 2014, 06:18:34 pm
content: They aren't "some chinese factory", they have reasonable financial backing and have been around for quite a long time. They are unlikely to disappear overnight. That said, i know nothing of their supply chain reliability, so I would not design in their products for large scale production.Due to the above (longevity and reasonable financial backing) i'd say their datasheet specified figures are likely to be correct, provided the use case is the same as specified in the datasheet. Do note, good design practice is to take the "maximum" value into consideration when designing rather than the typical. Typical is the icing on the cake.

author: krish2487
author_rank: Frequent Contributor
timestamp: April 10, 2014, 07:03:40 pm
content: Any specific reason why you are wanting to use those specific mosfets?Have a look at some ST parts likeSTP80NF55http://www.st.com/web/en/catalog/sense_power/FM100/CL824/SC1165/PF64798It is a little harder to drive but easier to source and readily available.My company has used about 50,000 of these mosfets in the last 8-12 months and we ve never had any issues sourcing them from the distributors. The regular lead time was about 7-10 days give or take.

author: M4trix
author_rank: Frequent Contributor
timestamp: April 10, 2014, 07:26:08 pm
content: Quote from: ruffy91 on April 10, 2014, 04:56:00 pmBlasphemy! Sanken is originally a Japanese semiconductor manufacturer and known for their reliable, rugged, best transistors for audio.

author: dannyf
author_rank: Super Contributor
timestamp: April 10, 2014, 10:18:24 pm
content: QuoteIt is known to produce high-linearity audio output transistors.

author: ruffy91
author_rank: Regular Contributor
timestamp: April 11, 2014, 11:21:53 am
content: Thanks for your information. I'll just give the SKI06106 a shot. They just seem to have the best ratio between conduction losses and switching losses at 200kHz. I'd have to go down to 25kHz with the STP80NF55 for the same switching losses with 3A gate drive!