TPS25751: GPIO for SINK PDO

Tomohiro Imoto

Part Number: TPS25751

Tool/software:

I was wondering if I could know through GPIO which sink PDO the TPS25751 operating in sink mode has contracted with the source device.

The system I am designing is power amplifier and TPS25751 is used only sink mode.
I would like to change output power level by contracted watt with source device.
I wonder that one of some solution is uCOM read register of TPS25751. ( Is that correct ? ), but I would like to avoide digital noise
as much as possible, so I don't want to select i2c.
Is it possible to know through GPIO which sink PDO or which watt the TPS25751 operating in sink mode has contracted with the source device ?

Sincely yours,

6 months ago

0 Kevin Kosta 6 months ago

TI__Mastermind 18125 points

Hi,

Thanks for reaching out on E2E!

We do not have any GPIOs that would support this.

The only other method with TPS2575 is to used an EC to poll the interrupt for NewContractAsConsumer and read the ACTIVE_CONTRACT_PDO (register 0x34) and ACTIVE_CONTRACT_RDO (register 0x35) to determine the PD contract negotiated.

Thank you,

Kevin

0 Tomohiro Imoto 6 months ago in reply to Kevin Kosta

Prodigy 30 points

Hi,

Thank you for your comment.

I will try to read the register as you advice.

By the way, I hate to bother you but what it mean "EC" ?

Sincely yours,

+1 Kevin Kosta 6 months ago in reply to Tomohiro Imoto

TI__Mastermind 18125 points

Hi,

Glad I can help!

And no worries, EC means an external controller or MCU.

Thank you,

Kevin

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TPS25751: GPIO for SINK PDO