• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 161 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TPS929120-Q1: The adjustment of output current and other questions

Zirui Su
Expert 5340 points
Part Number: TPS929120-Q1

Hi team

I would like to ask some questions:

1. In datasheet, does it mean we could adjust the maximum output current by setting different resistor values? If I would like to achieve a 64mA current, I could only set CONF_REFRANGE 11b and using R=8.45kohm then dimming from 75 to 64? Any other method could I use?

2.What is the current of the chip itself? （working condition: 9~16V, from -40℃ to 105℃), could we refer to it as the following 10mA?

3. If a constant 5V voltage is supplied to the chip, can it work normally within -40℃~125℃? (We have seen it support supply voltage from 4.5V to 40V, while concerning about the thermal issue and need to guarantee low and high temperature working normally) 

Thank you in advance

  • 0
    TI__Mastermind 31405 points

    Hi,

    1 Yes, CONF_REFRANGE=11b and Rref=8.45kohm is the only choose for you to achieve 64mA.

    2 Can you explain the condition that the current of chips work on? Because blocks in the chips need different current in different condition.

    For the table in your question,  the current is 10mA ,when all the channel is on.

    3 There are two questions actually. First, for chips a constant 5V is enough for -40℃~125℃. Second, for the LED which chip drives, the  voltage of the LEDs need is different in different temperature. So please make sure that 5V is enough to drive the LEDs in -40℃~125℃.