TPS3842-Q1: Maximum resistance for internal resistor ladder

Oscar Liborio

Intellectual 1130 points

Part Number: TPS3842-Q1

Tool/software:

Hi,

Do you have any data regarding the internal resistor divider at the sense pin which set the threshold voltage?

Oscar

9 months ago

0 Sila Atalar 9 months ago

TI__Genius 10500 points

Hi Oscar, Thanks for your question!

Unfortunately I'm unable to share that information. But you can back calculate it based on the sense pin information from the datasheet.

Hope this helps!

Best,

Sila Atalar

0 Oscar Liborio 9 months ago in reply to Sila Atalar

TI__Intellectual 1130 points

Hi Atalar,

It is not clear to me how can I calculate it from the datasheet.

Can you please show me?

Thank you

Oscar

+1 Sila Atalar 9 months ago in reply to Oscar Liborio

TI__Genius 10500 points

Hi Oscar,

V = IR.

Please find the Isense information in below.

The resistor values is not guaranteed since the trimmed resistor values vary device to device. To do back calculation, please use the typical (25C) value.

For example:

SENSE pin voltage/ SENSE current = 42V/1.35uA = 33MOhm

this way you can expect the resistor will be in ~10 Mohms range.

Hope this helps.

Best Regards,

Sila

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TPS3842-Q1: Maximum resistance for internal resistor ladder