• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 987 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.

TPS65023B: Error in app note schematic SLVA848B with VREF for DDR

Kristin P
Prodigy 40 points
Part Number: TPS65023B
Other Parts Discussed in Thread: TPS65023EVM-205

Hi, I believe there is an error in figure 3 of your app note for pairing the TPS65023B with the iMX7. R22 and R23 are connected to the output of LDO1 to create a reference for the DDR. However, the output of DCDC3 is the actual voltage used for the DDR, so I believe R22 should connect to VDCDC3. Please confirm if this is true. Has this circuit been tested with an actual iMX7?

Thanks!

  • 0
    TI__Genius 17380 points

    Hi Kristin,

    You are absolutely correct, R22 and R23 for VREF should be connected to DCDC3, not LDO1. We will update that ASAP.

    We didn't test the circuit with an actual i.MX7 part, but the design was developed in conjunction with customers who were and with the datasheet specifications for the i.MX7. The circuit drawn is based on modifications that were made to the TPS65023EVM-205; the error was made in the drawing of the schematic, not the testing of the circuit.

    Thank you for pointing this out so we can fix it.

  • 0
    TI__Mastermind 30260 points
    Thanks for catching this mistake, Kristin! And thanks to Kevin for confirming the error so quickly.

    I will get to work on resolving the discrepancy and re-publish the App Note. Keep in mind the changes may not be live on the web for a couple days, even after the correction has been made to the source document.

    -Brian