TPS65131-Q1: The internal compensated control loop

Ramazan Yaman1

Part Number: TPS65131-Q1

Dear Mr/Mrs,

Do you have any chance to show the internal compensation circuitry of this IC? Does it use a Type II error amplifier or something else?

Best regards,

Ramazan Yaman

over 5 years ago

0 Grant Falkenburg over 5 years ago

TI__Intellectual 1965 points

Hi Ramazan,

Thank you for your question. Let me contact the expert for this part. You can expect a response by 11/14/19.

Best,

Grant

0 Liaqat Khan over 5 years ago

TI__Mastermind 18550 points

Hello Ramazan,

I am sorry but we will not be able to share details of internal architecture. This information is proprietary.

Kind Regards,

Liaqat

0 Ramazan Yaman1 over 5 years ago in reply to Liaqat Khan

Prodigy 80 points

Hello Liaqat,

When I add a series resistor to the feedforward capacitor, TPS65131-Q1 starts to have a regulated voltage for inverting buck-boost converter side. When, I take that resistor out of the circuit, TPS65131-Q1 could not generate a regulated output voltage for inverting buck-boost side. Do you have any chance to provide a detailed information regarding this topic? The effects of that resistor in gain margin, phase margin and etc...

Best regards,

Ramazan Yaman

0 Liaqat Khan over 5 years ago in reply to Ramazan Yaman1

TI__Mastermind 18550 points

Hello Ramazan,

The purpose of the series resistor in the feed forward path is to avoid noise coupling into FBN pin through the capacitor by limiting the bandwidth of this path. Without this resistor, it is possible for enough noise to couple into FBN pin to disrupt voltage regulation.

Kind Regards,

Liaqat

Power management

Power management forum

TPS65131-Q1: The internal compensated control loop