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[TPS92630-Q1]About a connection of three LEDs and lighting up.

Masahiro Hoshina
Prodigy 50 points
Other Parts Discussed in Thread: TPS92630-Q1

Hello,
I have a question about TPS92630-Q1.
About a connection of three LEDs and lighting up.

1. Is the following status right?

Connecting LED      | Lighting Status        |  Comment
LED1  LED2  LED3 | LED1  LED2  LED3 |
Open  Open  Open | Off       Off      Off     |  As expected
Short  Open  Open | Off       Off      Off     |  LED1 is moment lighting up.
Open  Short  Open | Off       Off      Off     |  LED2 is moment lighting up.
Short  Short  Open | Off       Off      Off     |  LED1 & LED2 are moment lighting up.
Open  Open  Short | Off       Off      Off     |  LED3 is not lighting up.
Short  Open  Short | Off       Off      Off     |  LED1 is moment lighting up.
Open  Short  Short | Off       Off      Off     |  LED2 is moment lighting up.
Short  Short  Short | On       On      On     |  As expected

2.When connecting of optional LED short, is there a way to LED light up?
  ex) Connecting LED 　　 Lighting Status
　　　LED1  LED2 LED3 　　LED1　LED2　LED3
      Short    Open Open　⇒ On　　 Off　    Off　


Regards,
Hoshina

  • 0
    TI__Expert 5380 points
    1，Basically when LED is in short state , the short LED channel will not light up. When fault pin is floating, when there is short fault all channels will be turned off. Detailed please refer to the Table 1 Fault table in the datasheet.
    2, Short channel can't be turned on in TPS92630-Q1.

    May I know the application of this case? What is requirement?