TPS552882-Q1: Start up sequence

Shinji Tsuji

Genius 14169 points

Part Number: TPS552882-Q1

Hi team,

I am encountering an issue that my TPS552882-Q1 doesn't output any voltage at start up, then I have one question.

In my board, VIN is applied after EN/UVLO is applied as below.

Is there any concern if I startup the device in this sequence below?

regards,

0 Bryce Xun over 1 year ago

Hi Shinji,

Thanks for reaching out.

May I know what is the input voltage, output voltage and output current during the experiment?

Can you share the waveforms of SW1, SW2, Vout and inductor current at one page?

BRs,

Bryce

0 Shinji Tsuji over 1 year ago in reply to Bryce Xun

Hi Bryce-san,

I will check it, but in a mean time,

could you please advise if this power up sequence potentially cause the output not start up?

Is there a possibility that the device accidentally fall into STANDBY mode?

regards,

+1 Brigitte over 1 year ago in reply to Shinji Tsuji

Hello Shinji,

The expert of this device is out of the office until beginning of next week. So please expect an answer then.

In the meantime could you check if the issue is gone when you delay EN?

Best regards,
Brigitte

0 Shinji Tsuji over 1 year ago in reply to Brigitte

Hi Brigitte-san,

The issue has closed by changing the power up sequence, so this thread be closed.

regards,

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