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30th December 2008, 08:34 AM
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#1 |
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diyAudio Member
Join Date: Jul 2008
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General Puropse small chip amplifier (sch + pcb)
Hi to all
 I need to build a small poweramp for wide supply battery applications.. (also for headphone drive) I have considered these ic..  TBA820M - Mono - 1.2W - 3..16Vcc - PDIP8 http://www.st.com/stonline/products/...re/ds/1440.pdf Stereo PCB (i have found this with google  )LM386N - Mono - 700mW - 4..12V - PDIP8 http://www.national.com/ds/LM/LM386.pdf TDA7073A - Stereo BTL - 3..18Vcc - PDIP16 http://www.nxp.com/acrobat/datasheets/TDA7073A_AT_3.pdf TEA2025B - Stereo - 2x2W - 3..15Vcc - PDIP16 http://www.st.com/stonline/products/...re/ds/1523.pdf which is the best for battery supply ? others IC also with pcb ? thanks 
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30th December 2008, 08:52 AM
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#2 |
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diyAudio Member
Join Date: Sep 2003
Location: Midland, Michigan
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The TDA7073A and TDA2025B won't work well for headphones as the outputs are bridged.
Lowest external parts count is the LM386N but it doesn't produce much power ... maximum power is 700mW. Even less power at lower supply voltage. I'm not familiar with the TBA820M.
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Frank |
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30th December 2008, 12:50 PM
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#3 |
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diyAudio Member
Join Date: Feb 2004
Location: Anonymityville
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I've used TPA1517 with good results. The minimum supply voltage is a little higher than the other IC's, but it only requires a few external components and actually sounds decent.
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"If you don't like funerals don't kick sand in Ninja's face." - Ninja |
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30th December 2008, 03:57 PM
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#4 |
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diyAudio Member
Join Date: Aug 2006
Location: Chennai, India
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try TDA2822M or TDA2822, low component count, 3 V and good sound.
walkman audio amplifier IC - LA4581MB - it has seperate ground channel for headphone geound, tight bass and powerful sound - 1.8-3V
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. . .. ... ..... ........ ............. ..................... .................................. My Best LM3886 PCB layout 
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30th December 2008, 04:48 PM
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#5 |
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diyAudio Member
Join Date: Feb 2003
Location: ..
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check http://headwize.com/ubb/forumdisplay.php?fnum=3 for headphone amplifier diy
- the mini^3 is a AD8397 project with lots of support - boards, kits, builder forums: http://www.amb.org/audio/mini3/ |
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