TPS659039-Q1: PS659039,no PCM output found

Bao Songhao

Part Number: TPS659039-Q1

After debugging tps659039, it was found that PCM did not output. After checking, the power supply 5V and 3.3V were normal. The control signals given by the software include reset and EN,And also measured that the signal level is normal. Is there any signal that needs to be given? Can you help analyze it

over 2 years ago

0 Alex Saenz over 2 years ago

TI__Expert 6700 points

Hello Bao,

My apologies but can you clarify what you mean by PCM? Are you referring to PWM (pulse-width modulation) or PFM (pulse-frequency modulation) by chance?

Regards,

Alex

0 Bao Songhao over 2 years ago in reply to Alex Saenz

Intellectual 720 points

Dear Alex

It means that the PMU unit does not work and has no output voltage and current

0 Layne J over 2 years ago in reply to Bao Songhao

TI__Genius 12735 points

Hi Bao,

Alex is out of office today and will be returning next week. Please expect a response by Tuesday.

Best regards,

Layne J

0 Alex Saenz over 2 years ago in reply to Layne J

TI__Expert 6700 points

Hello Bao,

Would it be possible to have a look at the schematic you are using? I have linked the EVM guide below which gives an idea of what pins/jumpers need to be shorted as well as which signals one should expect to be hi/lo on powerup for the PMIC to work.

https://www.ti.com/lit/ug/swcu174a/swcu174a.pdf

Regards,

Alex

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TPS659039-Q1: PS659039,no PCM output found