Lme49830

enzedone · 18th February 2008, 07:24 PM

This looks interesting
LME49830
Mono High Fidelity 200 Volt MOSFET Power Amplifier Input
Stage with Mute 3

dave_gerecke · 18th February 2008, 07:43 PM

I dare say my friend, what hath you confused?

Peace,

Dave

enzedone · 18th February 2008, 11:34 PM

Sorry, forgot to put the link in

http://www.national.com/pf/LM/LME49830.html

dave_gerecke · 19th February 2008, 02:14 AM

I'm still not sure what has you confused. The LME49830 is a chip for providing voltage amplification and drive capability to drive the final stage transistors for the output stage. Basically it replaces multiple discreet transistors that would otherwise be necessary to provide for the input stages of the power amp. Hope this helps.

Peace,

Dave

cromodora · 21st February 2008, 11:51 AM

Interesting.
Input, vas and driver stages in one package.

Anybody know how the datasheet specs compare to using discretes?

Also what would make a good output MOSFET?

rikkitikkitavi · 21st February 2008, 03:11 PM

gentlemen, I believe you are in the wrong department

this chip and its cousings is discussed at:
LME49810 - a new cousin for LM4702

where you find most answers and more questions regarding the application of the national driver ICs.

/Rickard

cromodora · 21st February 2008, 04:26 PM

Thanks rikki!

Thought 'Chip Amps' room is for all-in-one chips like Gainclones and Tripaths.

18th February 2008, 07:24 PM	#1
enzedone diyAudio Member Join Date: Nov 2004 Location: New Zealand	Lme49830 This looks interesting LME49830 Mono High Fidelity 200 Volt MOSFET Power Amplifier Input Stage with Mute 3 __________________ I realized that a major part of my job was to figure out how to use technology control to create economic force, or leverage, such that money and business flowed in Microsoft's direction” — Alex St.John, father of DirectX.

18th February 2008, 11:34 PM	#3
enzedone diyAudio Member Join Date: Nov 2004 Location: New Zealand	Sorry, forgot to put the link in http://www.national.com/pf/LM/LME49830.html __________________ I realized that a major part of my job was to figure out how to use technology control to create economic force, or leverage, such that money and business flowed in Microsoft's direction” — Alex St.John, father of DirectX.

21st February 2008, 03:11 PM	#6
rikkitikkitavi diyAudio Member Join Date: Dec 2001 Location: South Sweden	gentlemen, I believe you are in the wrong department this chip and its cousings is discussed at: LME49810 - a new cousin for LM4702 where you find most answers and more questions regarding the application of the national driver ICs. /Rickard __________________ listen! Can you hear that ...

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18th February 2008, 07:43 PM	#2
dave_gerecke diyAudio Member Join Date: Dec 2007	I dare say my friend, what hath you confused? Peace, Dave

19th February 2008, 02:14 AM	#4
dave_gerecke diyAudio Member Join Date: Dec 2007	I'm still not sure what has you confused. The LME49830 is a chip for providing voltage amplification and drive capability to drive the final stage transistors for the output stage. Basically it replaces multiple discreet transistors that would otherwise be necessary to provide for the input stages of the power amp. Hope this helps. Peace, Dave

21st February 2008, 11:51 AM	#5
cromodora diyAudio Member Join Date: Feb 2005 Location: Singapore	Interesting. Input, vas and driver stages in one package. Anybody know how the datasheet specs compare to using discretes? Also what would make a good output MOSFET?

21st February 2008, 04:26 PM	#7
cromodora diyAudio Member Join Date: Feb 2005 Location: Singapore	Thanks rikki! Thought 'Chip Amps' room is for all-in-one chips like Gainclones and Tripaths.

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