The AM Forum
March 29, 2024, 05:51:43 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: SiC FETS Article  (Read 3858 times)
0 Members and 1 Guest are viewing this topic.
DMOD
AC0OB - A Place where Thermionic Emitters Rule!
Contributing
Member
*
Offline Offline

Posts: 1768


« on: January 04, 2021, 12:06:57 PM »

https://www.electronicdesign.com/power-management/whitepaper/21150383/stmicroelectronics-how-sic-transistors-can-improve-powerconversion-efficiency?oly_enc_id=3267B0827512C9X

Sent to me from Electronics Design.

Has anyone here used or tested SiC FETS as finals or in PDM stages or both?


Phil - AC0OB
Logged

Charlie Eppes: Dad would be so happy if we married a doctor.
Don Eppes: Yeah, well, Dad would be happy if I married someone with a pulse.NUMB3RS   Smiley
M0VRF
Member

Offline Offline

Posts: 172


« Reply #1 on: January 04, 2021, 12:33:32 PM »

Not worth using them in PDM as any old low Res FET will do.

The Cree SiCs are great for 160/80m and ok on 40m if you want to use those great big drivers but my NCPs get a bit toasty on 40 so stick to Transphorm GaN for that band.

I'm running a 200W carrier @ 96V and haven't had any probs.

I use 3R3 gate Res for SiC and nothing for GaN.

The GaNs will work on 20m

Folk seem hung up on 11N90s on here but they're obsolete and have no use in modern design! Pig to drive too, fine if you're used to valves I guess!

J.
Logged
KQ6F
Member

Offline Offline

Posts: 124


« Reply #2 on: January 04, 2021, 01:31:58 PM »

I've been using the Cree SiC devices for four years with no problems whatsoever.  As has been pointed out, they are easy to drive, are fast, and with low Ron characteristics.  On 75M they run very cool (almost cold) which means a complete transmitter can be packaged in a small plastic cabinet (see attached).


* ClassDE 001.jpg (319.92 KB, 1000x750 - viewed 574 times.)
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone © 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.05 seconds with 19 queries.