Driver transistor

icko · 28th September 2010, 01:15 PM

Hello all,

What is your favourite driver low power transistor, or driver trannie?

I would like to find a transistor should be specified at 20W. Currently I am using 2sc4793/2sa1837 but would like to replace them due to that they are not linear hfe at 250-300mA bias. a bandwidth of 100MHz. TO220 (and not TO-3) would be nice too.

I was looking at the 2sc6200(or something close, can't remember right now) which seem really good (linear to 250mA if I could remember) but I can't find any place to source them.

sajti · 28th September 2010, 01:57 PM

2SC5171/2SA1930

Sajti

icko · 28th September 2010, 04:25 PM

Thank you!

Those seem pretty good. At a really fair price too.

icko · 28th September 2010, 06:29 PM

Quote:

Originally Posted by sajti

2SC5171/2SA1930

Sajti

Do you, or anyone else have spice models for these?

nigelwright7557 · 28th September 2010, 08:27 PM

MJE350 or MJE340 are quite commonly used and easy to get hold of.

I have used them successfully in numerous designs with and without heatsinks.

richie00boy · 28th September 2010, 09:38 PM

Those MJE are pretty naff really and hFE starts to roll off well before 250-300 mA. MJE15034/5 are Ok at that kind of power level and are TO-220 like you wanted.

I like the Sanyo devices, 2SA1606/2SC4159 and 2SB1037/2SD1459 are worth a look.

icko · 29th September 2010, 09:54 AM

Thanks to all of your suggestions.

Now I've looked through all suggestions.

Especially the 2SC5171/2SA1930 and 2SA1606/2SC4159 seem to be really sweet devices. The only downside is of course the lack of readily available spice models.

MJE15034/35 seem to be pretty good choice too, a bit low ft though. ~30MHz

mt490 · 29th September 2010, 02:09 PM

Low power... 20W...

I use 2SA1708/2SC4488, but they're in a Sziklai where the lower capacitance is useful. They're 1W devices though...

A1592/C4134 is the same die in a larger package, and A2205/C6099 is the larger die (higher capcitance) in a larger package.

icko · 29th September 2010, 02:24 PM

Quote:

Originally Posted by mt490

Low power... 20W...

Everything is relative

Quote:

Originally Posted by mt490

I use 2SA1708/2SC4488, but they're in a Sziklai where the lower capacitance is useful. They're 1W devices though...

A1592/C4134 is the same die in a larger package, and A2205/C6099 is the larger die (higher capcitance) in a larger package.

I'm going to look into them after work.

jechentau · 29th September 2010, 02:28 PM

i have a bunch of 2sc4883a and use one now and then (also in my new amp i plan)
which have more Cob and lower fT than 2sc5171 but for the rest are almost as nice.

28th September 2010, 01:15 PM	#1
icko diyAudio Member Join Date: Sep 2008	Driver transistor Hello all, What is your favourite driver low power transistor, or driver trannie? I would like to find a transistor should be specified at 20W. Currently I am using 2sc4793/2sa1837 but would like to replace them due to that they are not linear hfe at 250-300mA bias. a bandwidth of 100MHz. TO220 (and not TO-3) would be nice too. I was looking at the 2sc6200(or something close, can't remember right now) which seem really good (linear to 250mA if I could remember) but I can't find any place to source them.

28th September 2010, 08:27 PM	#5
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	MJE350 or MJE340 are quite commonly used and easy to get hold of. I have used them successfully in numerous designs with and without heatsinks. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

28th September 2010, 09:38 PM	#6
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Those MJE are pretty naff really and hFE starts to roll off well before 250-300 mA. MJE15034/5 are Ok at that kind of power level and are TO-220 like you wanted. I like the Sanyo devices, 2SA1606/2SC4159 and 2SB1037/2SD1459 are worth a look. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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28th September 2010, 01:57 PM	#2
sajti diyAudio Member Join Date: Apr 2003 Location: Vác, Hungary	2SC5171/2SA1930 Sajti

28th September 2010, 04:25 PM	#3
icko diyAudio Member Join Date: Sep 2008	Thank you! Those seem pretty good. At a really fair price too.

29th September 2010, 09:54 AM	#7
icko diyAudio Member Join Date: Sep 2008	Thanks to all of your suggestions. Now I've looked through all suggestions. Especially the 2SC5171/2SA1930 and 2SA1606/2SC4159 seem to be really sweet devices. The only downside is of course the lack of readily available spice models. MJE15034/35 seem to be pretty good choice too, a bit low ft though. ~30MHz

29th September 2010, 02:09 PM	#8
mt490 diyAudio Member Join Date: Jun 2010	Low power... 20W... I use 2SA1708/2SC4488, but they're in a Sziklai where the lower capacitance is useful. They're 1W devices though... A1592/C4134 is the same die in a larger package, and A2205/C6099 is the larger die (higher capcitance) in a larger package.

29th September 2010, 02:28 PM	#10
jechentau diyAudio Member Join Date: Feb 2005 Location: Gelderland	i have a bunch of 2sc4883a and use one now and then (also in my new amp i plan) which have more Cob and lower fT than 2sc5171 but for the rest are almost as nice.

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