• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 206 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

TPS54202: request for layout review

TPS54202: VIN zone thermal contact incomplete error

Chenan Madalina
Prodigy 21 points
Part Number: TPS54202

Tool/software:

Hello, 

I have a question for you. Is there a problem if the VIN zone is making just one contact completely and the other partially on pin 3 of the TPS54202 converter? When I run DRC, it shows me a thermal error, and I want to know if I can ignore this error, or to solve it, to generate gerber files right after. Thank you in advance!

This is the image with complete pcb schematic of converter (if you have any recommendations for this):

There is the schematic:

This is the zone and the pin I am talking about.

  • 0
    TI__Mastermind 26396 points

    Hi Chenan

    Do you mean the thermal relief connection on VIn pin? Suggest avoiding this because this is not good for the thermal performance. Also this can cause larger parasitic inductance on the Vin trace. Please connect directly to Vin pin. 

    Other comment:

    C2-805 and C1-1206 should be placed close to IC VIn and GND pin. 

    SW trace should be short and wide, better not to have vias on SW.

    feedback resistor R4-805, R5-805 should be placed close the FB pin, keep away from noisy nodes like SW and BOOT. R5-805 should also be closed to GND pin. 

    Please refer to the section-10 Layout in the TPS54202 datasheet.

    The schematic:

    Recommend select inductor with Isat>ILIM_HS(3.2A for TPS54202)；

    C7-805 should have voltage rate >16V.

    Thanks and best regards.

  • 0 in reply to Gui He
    Prodigy 21 points

    Thank you for response! Yes it is that zone. Do you mean this board layout? This is where I got inspiration from with VIN zone and GND zone. 

  • 0 in reply to Chenan Madalina
    TI__Mastermind 26396 points

    Hi Chenan

    Yes Please refer to the layout example and my comments about your layout

    Thanks and best regards.