LP5018: LP5018 can't issue the brightness data after doing power disturbance test

Roy Chou1

Part Number: LP5018

Hi Team,

As title, we met an issue when did the power disturbance test.

The behavior after test is that we can read LP5018 address and we can also write. But when I tried to write brightness data, the device can't work. But if we reset the LP5018 via I2C. The device can change to normal.

So my question is that do we have register can indicate the issue? Current bottleneck is that we can't know the LP5018 is in abnormal status.

Ps. We tried to give an independent power to LP5018 Vcc, but useless.

Regards,

Roy

over 2 years ago

0 Ives Li over 2 years ago

TI__Expert 6440 points

Hi,

Sorry but LP5018 didn't have register to indicate the issue.

I want to know what about the test condition, does LP5018 is working and lighting the LEDs during test?

Thanks!

0 Roy Chou1 over 2 years ago in reply to Ives Li

TI__Genius 16055 points

Hi Ives,

Yes, but we can't control it. But we still can read its device ID and do the read/write action. (LED can't follow our command when we issue the command)

Roy

0 Ives Li over 2 years ago in reply to Roy Chou1

TI__Expert 6440 points

Hi Roy,

So could you please read the brightness register to see the value.

And please provide me the test condition.

Thanks!

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LP5018: LP5018 can't issue the brightness data after doing power disturbance test