National Semiconductor... - diyAudio
Go Back   Home > Forums > Commercial Sector > Swap Meet
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Swap Meet Sell your stuff here, who knows, some other fanatic might be interested!

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 15th February 2007, 03:11 AM   #1
diyAudio Member
Join Date: May 2004
Location: Cranbrook BC
Default National Semiconductor...

5 ICs: National Semiconductor LM4651N 170W Class D Audio Amplifier.

5 ICs: National Semicondutor LM4652TF 170W Class D Audio Amplifier
Q: Can the LM4651/LM4652 be used for frequency ranges other than subwoofer?
A: Yes. The audio frequency range is controlled by the external components and is not limited by the LM4651/52 chip set. Several external values need to be changed to increase or decrease the audio frequency range of operation. To increase the audio frequency range of operation the following values must change: L1 and CBYP (the output filter) must decrease, Cfl1, Cfl2 and Cf may need to decrease but normally this is not the case, R1, R2, and Rf may need to change to lower noise and gain to meet target specifications, ROSC may need to decrease, RDLY will need to be reduced or set to 0 . A pre-amplifier with a gain of 10V/V and a 2 pole active input filter is recommended. The input filter will control the audio frequency range while the output LC filter will be set to high levels to allow the frequency range of interest to have a flat, linear response through the output filter. This pre-amplifier/filter can be implemented easily with a low cost dual op. amp. like the LM833.

5 ICs: National Semiconductor LM4652TA

Trades? Offers?
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
National semiconductor chipamp sound second attempt ionomolo Chip Amps 13 18th May 2008 03:32 PM
Need amp repair help - Can you ID this semiconductor? GaryM Solid State 13 21st February 2008 01:10 PM
National Semiconductor LM4562 used as a line preamp. beppe61 Solid State 4 6th November 2006 06:54 PM
National Semiconductor chips in Oz MellowTone Chip Amps 12 31st August 2006 07:02 AM

New To Site? Need Help?

All times are GMT. The time now is 03:51 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2