LME 10/11/30/02 whats best for BJT?

benproiii · 30th April 2011, 10:27 PM

I have the LME49810 and LME49830.

what chip would be best to drive 2 pairs of 2sa5200/2sa1493 with MJE15032 as driver

panson_hk · 1st May 2011, 04:30 PM

I vote for 49811 and 49810.

lineup · 1st May 2011, 06:06 PM

Eventhough LME49830 can be tweaked for BJT
it is better to use the dedicated LME49810/11

I really recommend LME49810 before LME49811!!!
Why?
What the chip will do is to drive some transistors.
Now, 811 has 'only' 9 mA drive current typical.
While 810 has maximum 60 mA output drive current typical.
Go for LME49810. It has a good drive capacity.

panson_hk · 3rd May 2011, 01:56 PM

With the driver stage present, we should not be worry too much. Do a simple calculation to see whether the current gain of driver and output stage is sufficient for 9 mA from 49811.

49810 has a nice feature - Baker clamp.

lineup · 3rd May 2011, 02:47 PM

Quote:

Originally Posted by panson_hk

With the driver stage present, we should not be worry too much.

True.
So maybe LME49811 will be sufficient.

30th April 2011, 10:27 PM	#1
benproiii diyAudio Member Join Date: Aug 2010	LME 10/11/30/02 whats best for BJT? I have the LME49810 and LME49830. what chip would be best to drive 2 pairs of 2sa5200/2sa1493 with MJE15032 as driver

1st May 2011, 06:06 PM	#3
lineup diyAudio Member Join Date: Dec 2005 Location: the north	Eventhough LME49830 can be tweaked for BJT it is better to use the dedicated LME49810/11 I really recommend LME49810 before LME49811!!! Why? What the chip will do is to drive some transistors. Now, 811 has 'only' 9 mA drive current typical. While 810 has maximum 60 mA output drive current typical. Go for LME49810. It has a good drive capacity. __________________ lineup

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1st May 2011, 04:30 PM	#2
panson_hk :) diyAudio Member Join Date: Aug 2005 Blog Entries: 10	I vote for 49811 and 49810.

3rd May 2011, 01:56 PM	#4
panson_hk :) diyAudio Member Join Date: Aug 2005 Blog Entries: 10	With the driver stage present, we should not be worry too much. Do a simple calculation to see whether the current gain of driver and output stage is sufficient for 9 mA from 49811. 49810 has a nice feature - Baker clamp.

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