• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 64 subscribers
  • Views 302 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.

TPS61391EVM-058: Connection and BOM issue

Shean-Der Chiou
Prodigy 10 points
Part Number: TPS61391EVM-058
Other Parts Discussed in Thread: TPS61391

We bought a TPS61391EVM-058 for evaluation months ago.

We are going to build the boost circuit in our design. However, we are confused with something in the user guide ( www.ti.com/.../slvubs9.pdf ). 

1. On page 4 of the user guide, a schematic is shown. We found the pin 1 of U1 (TPS61391) is connected to the power [AVCC] in the schematic, however, it is NC pin and should be left "not connected", right?

2. On page 5 of the user guide, a BOM is shown. The part number of U1 is written as [TPS61391RGT], but we could found just [TPS61391RTER] and [TPS61391RTET] in it's datasheet. Is [TPS61391RGT] a typing error?

  • +1
    TI__Expert 4760 points

    Hi Shean,

    You are right. The pin1 is NC pin and should be floating or connected to GND. TPS61391RGT is an obsolete version in our system. In EVM, pin 1 is connected to AVCC but it will not influence normal behavior so it is not corrected. Sorry for the confusing.