• These commercial threads are for private transactions. diyAudio.com provides these forums for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members, use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

FS: TPA3251 amplifier complete or board

[SOLD]
Hi,

Build two of those for a friends new house, but later we used another solution as he needed much more power.

What it is:
TPA3251 based class-D amp with balanced and unbalanced inputs, analogue power supply with 100VA transformer, supply voltage around 35VDC. Case is about 280 x 280 x 60 mm (mini size).

Design of the PCB layout of the amplifier part follows TI reference design closely, to power opamps uses DC-DC +/- 15V with LDO post regulators.

Opamps are LM4562, output inductors are 10uH. Amp has speaker protection with relays (driven by fault signal from chip)

I will include the schematics and PCB layout.

See my post in the TPA3251 thread for measurements. This is 100% working and measures like TI reference board.

Unusual way of speaker output was because I used a case of a headphone amp. Cables you see in the picture are included.

Price complete unit as in the pictures: [SOLD], can also sell complete PCB board only, PM me for details. I also have additional empty PCB's [$25 incl. shipping}
 

Attachments

  • P1050183.jpg
    P1050183.jpg
    187.7 KB · Views: 439
  • P1050186.jpg
    P1050186.jpg
    249.8 KB · Views: 414
  • P1050187.jpg
    P1050187.jpg
    236.2 KB · Views: 410
  • P1050188.jpg
    P1050188.jpg
    197.9 KB · Views: 403
  • P1050196.jpg
    P1050196.jpg
    186 KB · Views: 397
  • P1050194.jpg
    P1050194.jpg
    131 KB · Views: 156
  • P1050190.jpg
    P1050190.jpg
    101.9 KB · Views: 122
Last edited: