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TLC59116 Vcc off

Zoltan D
Prodigy 50 points
Other Parts Discussed in Thread: TLC59116

Hi,

Is it OK to switch off the Vcc supply of a TLC59116 driver, while the LED anode voltage is still on?

If yes, does the max. output leakage current of 0.5uA still apply?

Background:
When my device goes into standby mode, the 3.3V supply voltage is turned off completely, but the LED anodes are still connected to the battery.

Thanks!

  • 0
    TI__Expert 5275 points

    Hi Zoltan,

      

    The absolute maximum ratings table specifies a 20V maximum for the LED outputs (not dependent on Vcc).  So the device should not be damaged if Vcc is removed.   To contrast, see the abs max input voltage range cannot exceed Vcc by more than 0.4V.

    As for the 0.5uA leakage, there is no guarantee this will be the same.   It is recommended for the device to have a Vcc between 3V and 5.5V and the electrical characteristics are specified for this range.

     

    Best Regards,

    Adam Hoover

    Applications Support Engineer

  • 0 in reply to Adam Hoover
    Prodigy 50 points

    Thank you Adam!

    If anyone uses such a setup, I'd be still interested in how it works, especially WRT to the leakage (in this case: standby) current.