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TPSM8D6C24: PMBUS Address

Michael Balourdas

Expert 4955 points

Part Number: TPSM8D6C24

Hello,

My customer has a design where the top resistor of ADRSEL_A is 1.1kOhm and the bottom is 10kOhm. Based on the datasheet, this seems like it corresponds to address 0x24h (36d). But the device responds to 0x14h (20d) instead. Are we misinterpreting the datasheet?

Thanks,

Michael

0 Michael Balourdas 9 months ago

TI__Expert 4955 points

Here is the schematic:

0 Nancy Zhang 9 months ago in reply to Michael Balourdas

TI__Mastermind 46760 points

Hi Michael,

The address should be 20d with top resistor DNP and bottom resistor 10k. Please see below from design tool. How do you think it should be 24d?

Thanks,

Nancy

0 Michael Balourdas 9 months ago in reply to Nancy Zhang

TI__Expert 4955 points

Hi Nancy,

My question is about 1.1k top resistor and 10k bottom resistor. What address should that be?

The device on the customer board is responding to 20d with these resistors. We are expecting it to respond to 36d.

Thanks,

Michael

0 Nancy Zhang 9 months ago in reply to Michael Balourdas

TI__Mastermind 46760 points

Hi Michael,

In your attached schematic, the top 1.1k resistor is DNP. Please make sure R387 1.1K is DNP or not.

Thanks,

Nancy