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Old 16th November 2009, 10:15 AM   #1
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Default Complete TDA2030a PCB

It is complete TDA2030a pcb. Plzz make it final or some thing is adjustable?
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C1 0,47 uF
1
C2 2,2 uF, 50 v
1
C3 22 uF, 50 v
1
C4 1000 uF, 50 v
1
C5, C7 0,1 uF, 50 v
2
C6 2200 uF, 50 v
1
CI 1 TDA2030A
1
R1, R2, R4, R5 100 k
4
R3 4,7 k
1
R6 1 Ohm
1
VD1, VD2 1N4001
2
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Old 17th November 2009, 10:27 AM   #2
Stream is offline Stream  Russian Federation
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Can You describe all "X*" please (like V+, In, Out...).

Have 6 spare TDA2030a and also interested on simpe and good PCB
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Old 17th November 2009, 10:40 AM   #3
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Old 17th November 2009, 10:59 AM   #4
sangram is online now sangram  India
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My only comment is that your resistor values are too high all around. This could lead to noise and offset issues.

I would use 10K for the dividers, and about 22K input impedance (R1/R4 and R2, respectively), and 22K/1K for feedback loop (R5 and R3). Capacitor values of C1 and C2 will need revising to roughly 10x-20x their listed values to prevent LF cutoff.

About the PCB, some tracks seem longer than they need to be - the one connecting C3 and R2, for instance, can be routed much shorter, and it's a pretty critical connection to minimise noise as it's a low-level signal. I would also not use a ground plane. Even if it's dedicated to low-level signal circuitry, the way you've done. A track is better to control where the currents are flowing. I would return R3 halfway between the input and power grounds, on the other side of the plane instead of the edge. This may require a little more tinkering. It will work just fine probably, but tweaking it slightly will help your S/N ratio.

I would also look at a way to get a small film cap in || with the output cap. Actually, I would prefer you use a split supply as that eliminates the output cap and the R1/R4/C3 circus. However, that's your call.
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Old 17th November 2009, 12:19 PM   #5
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PlzCan u give me any link to get best and perfect error free pcb layout or schematic.
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