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Old 20th June 2007, 08:39 AM   #1
bbp is offline bbp  China
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Default My work! LM4766 Full balanced

To build a stereo amp, I plan to use 8*LM4766!
I just finished PCB project with Protel DXP
Each board uses power regulator build with 5-10 mA current source and LM431 (adjust it to 32V)

Here is some PICs about it ,but I have not make real PCB out yet
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Old 20th June 2007, 08:47 AM   #2
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Default more pics

PCB in 3D
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Old 20th June 2007, 08:50 AM   #3
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Default sch

my english is so so so poor
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Old 20th June 2007, 08:51 AM   #4
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Default Pcb

Make this PCB out, and ...

here is the bottom side
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Old 20th June 2007, 09:03 AM   #5
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Default Re: sch

Quote:
Originally posted by bbp
my english is so so so poor
I haven't seen any signs of this yet Your english is quite alright.

Are you really usre about the parallel connection? Don't you need any resistors in series as the rest of the world does?
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Old 20th June 2007, 10:37 AM   #6
bbp is offline bbp  China
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Default Re: Re: sch

Quote:
Originally posted by bbp
my english is so so so poor

Quote:
Originally posted by peranders

I haven't seen any signs of this yet Your english is quite alright.

Are you really usre about the parallel connection? Don't you need any resistors in series as the rest of the world does?

The post#1 shows the real schematic ,and post#3 only shows the theory,not the one I really want to build


On the PCB, I will use 4 * 0.47-1 omega resistors on each board.
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Old 20th June 2007, 11:17 AM   #7
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Talking PCB is on

here are both the side of PCB
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Old 20th June 2007, 11:28 AM   #8
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Default PCB2

Get a clear view
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Old 20th June 2007, 11:41 AM   #9
Electrons are yellow and more is better!
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Have you really tested to connect the inputs of LM1876 they way you do?

I really suggest you take a look at AN-1192!
http://www.national.com/an/AN/AN-1192.pdf
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Old 20th June 2007, 12:02 PM   #10
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Default ......

Many thanks for your suggestion,actually I have not test it before,I made the schemartic through my experience,but I will test the circuit later,and then make a report .
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