TPS23523: TPS23523 Schematic Review

Hi Avishek,

The below system input voltage is 60V max, input surge protection circuit is designed for 120V(Vclamp 120v->AK10-066C). My question is whether 100V MOSFET(Gate 1 Q1) is enough for this circuit.

Hi Anoop,

Thanks for reaching out. Are you talking about which MOSFET, Q1, Q2, or Q3? 

Hi Avishek,

I am talking about Q1 and Q2

Hi Avishek pal ,

Thanks for Replay,

1)Which one is RCC resistor ?

2 )Our under-voltage requirement is 36V and OV voltage 60 V, But your calculator mentioned it is UV 39V and 58V.Can we change?

Hi Anoop,

Please see the responses in the order of your queries. 

1) R_VCC is the resistor connected between RTN and VCC of TPS23523.

2) You can change according to your design specifications. I had not modified those cells. 

Hi Avishek pal

Thanks for the replay,

1)what is the meaning of  (Ti calculator column 21) Target current limit.

Our system 1st turns on the BMC section, it is taking 4A, thereafter other section enabling. If so, can we set the 4A target current limit?

2)PGB pin  Can we connect directly to  Regulator enable?

3) Is it necessary or not LC filter in output? ( we have CM/DMfilter on the input of DC-DC regulator )

I will get back to you tomorrow. 

Hi Avishek,

Thanks for your support. The updated schematic will send for review.

Hi Anoop,

Please share. We will review then. 

Hi Avishek,

check private messages

If I get back to you on Monday, is it fine for you? I will on leave from tomorrow to Sunday.

Ya No problem

Thanks for your patience. 

Hi Anoop,

Please share the latest design calculator based on which the schematic has been developed. 

Hi 

Hi Avishek,

PFA, The design calculations are the same as those you modified in the first review. Please check private chat.

TPS2352X_Excel_Tool_anoop varma_Modified by TI (2).xlsx

Hi Anoop,

Thanks… I will share the review comments by today end of the day.

Hi Anoop,

Sorry for the delay. I need some more time to review the schematic. I will get back to you end of this week. 

ok Np

Hi Avishek,

Any updates on this?

Hi Anoop,

TPS23523 schematic looks fine to me. However, it seems that the component values are not updated as per the design calculator. 

Hi Avishek,

The below yellow color marked part I changed as per your previous command.

Hi Avishek,

I changed,

what is "Target inrush current(at max count)" mean, it is showing 0.4A only.

Hi Anoop,

Thanks for reaching out. I will get back to you tomorrow.