TAS6424LQ1EVM: How to start up and set up the EVM board with PVDD > 18V?

Hello Tamas! Please note line item # 3 on the first page of: www.ti.com/.../slou463.pdf , where J2 and J12 have to both be properly set as described, depending on what you are trying to do:
"3. Power Supply Unit (PSU) up to 26.4 V, > 6 A capable, if J2 is removed and 12 V is provided. If J12 is in, limit the input voltage to 18 V"

Thanks, Jeff

Dear Jeff, Thanks for your kind Help!
To be honest, I did read this line, but did not really understood. Probably it is because of the language barrier... :-)
So, If I remove J2 (a short soldered to the "GND PSU in" at the bottom of the PCB, which is based on the schematics providing the GND connection from the PSU to the whole Circuit), I should provide 12V. OK but where, to which point should I provide the 12V??
If J12 is in, then I should limit the voltage to 18V means for me, that If I want to go above 18V, then I should remove Jumper J12.

So to sum up: I should remove Jumper J12, and I should remove J2 (from the bottom of the PCB) and I should use up to 26V as the PSU, and I should also use an additional 12V Voltage? If so, then where should I connect the 12V ?

Or do I misunderstand it completely?

Thanks ,

Tamas

Hello Tamas! Yes, that is my understanding as well.

Hello Tuan,

Do you have any other pointers here? Thanks, Jeff

Dear Jeff, what I miss is where to connect the additional 12V?

Thanks,

Tamas

Hello Tamas! Ah... i see your point! There is a typo in the TAS6424L document, that was a cut an paste error from the TAS6424 version. There is no second 12V supply. Either J12 is in place or not... this just ties PVDD to VBAT. So, for the TAS6424 the following statement is correct:

3. Power Supply Unit (PSU) up to 26.4 V, > 6 A capable, if J12 is removed and 12 V is provided. If J12 is
in, limit the input voltage to 18 V

for the TAS6424L, which is the voltage limited version, the correct statement is:

3. Power Supply Unit (PSU) up to 18 V, > 5 A capable with J2 in place.

so sorry for the confusion and we will update the document. Thanks, Jeff

Dear Jeff, i see now the problem. I did order the TAS 6424LQ1EVM board because the PDF writes that it is a 4x75W and up to 26.4V board, however it is not.... :-( so now what would you suggest as a solution? If i read correctly the only difference between the TAS6424LQ1EVM and the TAS6424Q1EVM is that in the L version EVM board an L version chip is soldered??
If this is the case, I would kindly ask you to send me just a TAS6424Q1 chip, which I would then use in my TAS6424LQ1EVM board...
Does it make sense?

Thanks,

Tamas

Hello Tamas!

Per the datasheet the TAS6424L is rated:

27 W, 10% THD Into 4 Ω at 14.4 V
27 W, 10% THD Into 2 Ω at 14.4 V
80 W, 10% THD Into 2 Ω at 18 V PBTL

Also per the datasheet the TAS6424 is rated:

75 W, 10% THD Into 4 Ω at 25 V
45 W, 10% THD Into 2 Ω at 14.4 V
150 W, 10% THD Into 2 Ω at 25 V PBTL

We do not recommend modifying a board that you may use for performance testing, as there are differences. It would be easier for me to send you a TAS6424 board. could this work for you and what would be your shipping address, phone, email, etc...?

thanks, Jeff

Dear Jeff,

thanks that would be just fine.

My address and company details :

Invoicing address:
T-Corp Bt
Ujszasz str 45/b K2 F6
1165 Budapest, Hungary

Shipping address:
T-Corp Bt
Gyomroi str 69 HIT PARK
1103 Budapest
Hungary

Kontakt info:
Tamas Tako
Tel:+36302025356
Email:t.corp.bt(at)gmail.com

Thanks,

Tamas

Dear Jeff,

Thanks for your kind help!

Tamas

You are very welcome!