BQ76952: Inquiry Regarding DDSG & DCHG Behavior on BQ76952 Without Programmed

Tom Tsao

Part Number: BQ76952

Tool/software:

Dear TI Support Team,

We have observed a phenomenon when using the BQ76952. If we do not program any parameters, the DDSG and DCHG pins remain HIGH for approximately 20 seconds after startup before transitioning to LOW.

Could you provide any official explanation for this behavior? Is this expected, and is there any documentation or reasoning behind it?

Looking forward to your response. Thank you!

Best regards,

6 months ago

0 Alexis_H 6 months ago

TI__Genius 17835 points

Hello Tom,

Do you mind sharing a waveform of this? (DDSG, DCHG, CHG, DSG)

Can you also share your configuration file (.gg) and your schematic?

Best Regards,
Alexis

0 Tom Tsao 6 months ago in reply to Alexis_H

Expert 1850 points

Hi Alexis,

Please check the attached waveform and schematic.

Why do the waveforms have different timing sequences in these situations?

Thanks!

BQ76952_TI.pptx

0 Luis H. S. 6 months ago in reply to Tom Tsao

TI__Mastermind 42060 points

Hello,

Our engineers are out of office and will get back to you next week.

Best Regards,

Luis Hernandez Salomon

0 Tom Tsao 5 months ago in reply to Luis H. S.

Expert 1850 points

Hi Luis,

Is there any update on the above question yet?

Thanks!

0 Alexis_H 5 months ago in reply to Tom Tsao

TI__Genius 17835 points

Hello Tom,

Thank you for your patience and for sharing those waveforms.

Do you mind also sharing the configuration file and schematic surrounding the DDSG pin as well? Could you also clarify which pins are the green, blue, and yellow waveforms? Is the yellow waveform supposed to represent DDSG?

Best Regards,
Alexis

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BQ76952: Inquiry Regarding DDSG & DCHG Behavior on BQ76952 Without Programmed