PTN78060AAS RSET TRANSFER FUNCTION

SIDDHARTH MOHAN

Genius 3205 points

Hi All,

I need advise on PTN78060AAS-

- In datasheet I found the below transfer function for the RSET Page -8

Can some explanation be provided on how this transfer function is obtained , any block diagram explaining the same?

Regards

over 6 years ago

0 J Arrigo over 6 years ago

TI__Mastermind 28020 points

PTN78060A internal resistors.pdfThe Rset equation is derived from the internal resistor divider on the feedback of the internal error amplifier. See attached.

0 SIDDHARTH MOHAN over 6 years ago in reply to J Arrigo

Genius 3205 points

thanks for the reply, i hope this part has an internal integrated inductor ?

0 J Arrigo over 6 years ago in reply to SIDDHARTH MOHAN

TI__Mastermind 28020 points

Yes, this device has an internal integrated inductor.

0 SIDDHARTH MOHAN over 6 years ago in reply to J Arrigo

Genius 3205 points

i am still unable to derive the RSET transfer function from this diagram, any hints would be great

0 SIDDHARTH MOHAN over 6 years ago in reply to SIDDHARTH MOHAN

Genius 3205 points

is the opamp in the block diagram shared earlier being used as a comparator or there is some feedback from opamp output back to any pin of the IC, any advise on this will be great ?

0 J Arrigo over 6 years ago in reply to SIDDHARTH MOHAN

TI__Mastermind 28020 points

Please contact me directly at jarrigo@ti.com.

0 SIDDHARTH MOHAN over 6 years ago in reply to J Arrigo

Genius 3205 points

Hello All, i am not clear as to how the below transfer function is getting generated from the block diagram of the part -

Vo = Vref * (1 + R1 / (R2 || (Radj+Rset))) where Radj=5.62K

CAN anyone please hint

0 J Arrigo over 6 years ago in reply to SIDDHARTH MOHAN

TI__Mastermind 28020 points

I will walk you through it offline

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PTN78060AAS RSET TRANSFER FUNCTION