TPS65983B: TPS65983B PP_EXT Rsense and PP_EXT current formula

Leo Tseng2

Prodigy 140 points

Part Number: TPS65983B

Hi Ti :

Intel Apex Creek reference design is 10m ohm for PP_EXT Rsense.

We want to know the formula of Rsense and Current calculattion.

Please provide formula to us.

over 8 years ago

0 Eric Beljaars over 8 years ago

TI__Mastermind 36756 points

Hi Leo,

You can find the formula for current measurements in section 13.1 of the Firmware User's Guide: www.ti.com/.../slvuah7b.pdf

Thank you,
Eric

0 Leo Tseng2 over 8 years ago in reply to Eric Beljaars

Prodigy 140 points

Hi Eric :
Thanks, as I check TPS65983B spec page 15. There is PP_EXT current limit setting. Do yo know which setting in FW v4.39?
we want to know current limit setting at how many ampere? could we modify it?

0 Eric Beljaars over 8 years ago in reply to Leo Tseng2

TI__Mastermind 36756 points

Hi Leo,

Which FW template are you using on the TPS65983B? Can you send me your .PJT file?

Thank you,
Eric

0 Eric Beljaars over 8 years ago in reply to Eric Beljaars

TI__Mastermind 36756 points

Hi Leo,

The Current Limit Setting on the TPS65983B for PP_HVE will be determined by the current set in the Source Capabilites Register. I noticed in your Source Capabilities, you had set one PDO on PP_HVE with a maximum current of 3.25A and a 100% Peak Current setting. This will enable a current limit setting at 3.25A.

Thank you,
Eric

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TPS65983B: TPS65983B PP_EXT Rsense and PP_EXT current formula