fairchild semi, new audio output devices

[unclejed613]

http://www.fairchildsemi.com/pf/FJ/FJP5200.html
http://www.fairchildsemi.com/pf/FJ/FJP1943.html

it seems that the 2SC5200/2SA1943 devices are being licensed to other manufacturers.

[kalmara]

Originally posted by unclejed613

it seems that the 2SC5200/2SA1943 devices are being licensed to other manufacturers.

The original Fairchild analogs to these devices were KSC5200/KSA1943.

[theAnonymous1]

Originally posted by unclejed613
http://www.fairchildsemi.com/pf/FJ/FJP5200.html
http://www.fairchildsemi.com/pf/FJ/FJP1943.html

it seems that the 2SC5200/2SA1943 devices are being licensed to other manufacturers.

Or even better yet, the 150w TO-264 package FJL4315/FJL4215.

[jaycee]

They have good models too... now if only they had some good TO-220 drivers!

KSA1381/KSC3503 also have good models and are excellent VAS devices

[linuxguru]

Very nice, but with the Toshiba TO-264 2sc5200/2sa1943 still easily available for just over a dollar in quantity, I can't see the TO-220 versions picking up unless they're priced at 50 cents or so. However, the TO-3P 2sc5242 looks more interesting to me - sacrifices just 20W in Pd and can be retrofitted in legacy TO-3 mountings (it's better than the 2sc5198/2sa1941 TO-3P pair for this purpose).

I tried to get the Fairchild Spice models forwarded by e-mail from the link provided, but it doesn't seem to work. Can somebody who has downloaded the models successfully please post them here?

[jaycee]

Good thing about them being available from Fairchild is that you can buy direct from Fairchild - even if you're a hobbyist. This means you are guaranteed genuine devices.

In the UK, I've not once seen anyone actually selling "Toshiba" branded ones - if you find them, theyre Magnatec.

[linuxguru]

Out here, Magnatec and most Fairchild devices (except some small signal stuff) are unobtainium. But Toshiba is available in quantity, probably sourced from wholesale distributors in Singapore. The genuine 2sc5200/2sa1943 pair is sometimes 50% of the price of the Chinese fakes at retail here - go figure...

Meanwhile, on the subject of transistors with interesting specs - check out the Sanyo 2sc3807. Vceo=25v, fT=260 MHz, Ic=2A, Cob=27pF and hFE=800..3200 - not a darlington! These are available retail here for about $0.20, and almost all of them have hFE > 1500.

[homemodder]

Spice models


* KSA1943 PNP EPITAXIAL SILICON TRANSISTOR
*---------------------------------------------------
* AUDIO POWER AMPLIFIER
* High Current Capability(Ic=15A)
* High Power Disspation
* Wide S.O.A
* Complement to KSC5200
*---------------------------------------------------
.MODEL KSA1943 PNP (
+ IS =3.5476E-11
+ BF =159.9
+ NF =1.0
+ BR =25.75
+ NR =1.011
+ ISE =2.5119E-10
+ NE =2
+ ISC =7.9433E-11
+ NC =1.37
+ VAF =60.0
+ VAR =11.07
+ IKF =2.8370
+ IKR =0.3548
+ RB =2.74
+ RBM =0.0381
+ IRB =3.6308E-3
+ RE =0.06
+ RC =0.01
+ CJE =4.1783E-9
+ VJE =0.6354
+ MJE =0.3374
+ FC =0.5
+ CJC =1.1383E-9
+ VJC =0.5
+ MJC =0.3699
+ XCJC =0.7624
+ XTB =1.5306
+ EG =1.1751
+ XTI =3.0 )
*-----------------------------------------------------
* FAIRCHILD PUCHUN S.KOREA CASE: TO-3P PID:KSA1943

[homemodder]

* KSC5200 NPN EPITAXIAL SILICON TRANSISTOR
*---------------------------------------------------
* AUDIO POWER AMPLIFIER
* High Current Capability(Ic=15A)
* High Power Disspation
* Wide S.O.A
* Complement to KSA1943
*---------------------------------------------------
.MODEL KSC5200 NPN (
+ IS =4.3031E-12
+ BF =152.1
+ NF =1.0
+ BR =6.155
+ NR =1.028
+ ISE =1.3924E-11
+ NE =1.5
+ ISC =2.7542E-11
+ NC =1.95
+ VAF =60.0
+ VAR =6.51
+ IKF =10.8637
+ IKR =0.1585
+ RB =2.47
+ RBM =0.02
+ IRB =0.08
+ RE =0.04
+ RC =0.015
+ CJE =5.8111E-9
+ VJE =0.6506
+ MJE =0.3357
+ FC =0.5
+ CJC =6.4394E-10
+ VJC =0.5
+ MJC =0.3966
+ XCJC =0.7624
+ XTB =1.0445
+ EG =1.1663
+ XTI =3.0 )
*-----------------------------------------------------
* FAIRCHILD PUCHUN S.KOREA CASE: TO-3P PID:KSC5200

[unclejed613]

as far as linearity (beta vs. Ic) i think the MJL3281/1302 xistors still have them beat, but they (C5200/A1943) are also stabilized beta devices and are more linear than MJ15024/15025 devices (which for a long time were the "standard" output devices in american audio designs).