DLPC3432: DLPC3432+DLPA3000

H R H

Part Number: DLPC3432

Tool/software:

Dear TI engineer，

I found that the DLPC3432 power off sequence was abnormal when i tested the waveform.The specifications require RESETZ to power off the controller first, and then power off the controller.

But I found out the power went down first.Does this timing cause any anomalies?

6 months ago

0 Alexander Chan 6 months ago

TI__Genius 9580 points

Hello User,

Welcome back to the E2E forums and we hope to assist you with your questions.

Is this a TI EVM you are testing on or your own custom designed system?

Regards,

Alex Chan

0 H R H 6 months ago in reply to Alexander Chan

Prodigy 30 points

Hello Alexander,

I use my own board.

0 H R H 6 months ago in reply to H R H

Prodigy 30 points

Hello，

Please look at this problem，tks！

0 Maximus Rusi 6 months ago in reply to H R H

TI__Expert 7105 points

Hello,

Is it possible you have a large amount of capacitance on the 1.8V line causing it to slowly dissipate?

Best,

Max

0 H R H 6 months ago in reply to Maximus Rusi

Prodigy 30 points

Maybe you misunderstood me.The specifications require RESETZ to power off the controller first, and then power off the controller.I found that the DLPC3432 power off first as in the picture above.

0 Maximus Rusi 6 months ago in reply to H R H

TI__Expert 7105 points

Hello,

Could you please provide a scope shot of the following signals

scope shot 1
- proj_on
- resetz
- hostirq
- 1.8V
scope shot 2
- resetz
- parkz
- 1.8v
- Vofs

Best,

Max

0 H R H 6 months ago in reply to Maximus Rusi

Prodigy 30 points

Hello，

Maybe I was testing the signal wrong, but it looks fine now. Thank you！

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DLPC3432: DLPC3432+DLPA3000