TLV62569: TLV62569 Schematic review

Ruei Wu

Prodigy 50 points

Part Number: TLV62569

Tool/software:

Hi Team,

I have urget quest want to ask,

Is it right?

over 1 year ago

0 Josef Marsmann over 1 year ago

TI__Expert 6650 points

Hi Ruei,

Thanks for using E2E.

Here my comments to the schematic:

R78 should be removed to have a safe high signal on the EN input pin
The feedback divider could have higher values to get better efficiency.
If you are using about 100kOhm for R73+R79 you should select 6.8pF for C14 according our data sheet..
Also according our data sheet we have tested a output capacitance of 2x 22uF max. so C16 should be 22uF.

Best regards,

Sepp

0 Ruei Wu over 1 year ago in reply to Josef Marsmann

Prodigy 50 points

Hi Josef,

May I know when I use the 820K ohms and 180K ohms on the feedback divider, is I need add the 6.8pF in parallel the 820K and 180K ohms that transtient could be good?

could you simulator this vaule?

0 Josef Marsmann over 1 year ago in reply to Ruei Wu

TI__Expert 6650 points

Hi Ruei,

I will check your configuration and will come back to you asap.

Best regards,

Sepp

+1 Josef Marsmann over 1 year ago in reply to Josef Marsmann

TI__Expert 6650 points

Hi Ruei,

for 820k/180k we are recommending a feedforward cap of about 3.9pF. If the R2 (180k in your case) is nearly doubled, Cff should be half of 6.8pF

Best regards,

Sepp

0 Ruei Wu over 1 year ago in reply to Josef Marsmann

Prodigy 50 points

Hi Josef,

thank you for your greatly support.

Best Regards,

Ruei

0 Josef Marsmann over 1 year ago in reply to Ruei Wu

TI__Expert 6650 points

You are welcome!

Best regards,

Sepp

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TLV62569: TLV62569 Schematic review