TPS65987D: TPS65987D thermal information in 100W supporting

Peter Chen(ICP_FAE)

Intellectual 2480 points

Part Number: TPS65987D

Customer would like to do TPS65987D in 100W supporting. Is any TPS65987D thermal information in 100W?

over 7 years ago

0 Eric Beljaars over 7 years ago

TI__Mastermind 36756 points

Hi Peter,

The datasheet for the TPS65987D has layout guidelines that should be followed for supporting 100W. These are found in section 11 of the datasheet.

If this answers your question, PLEASE select This resolved my issue

Thank you,
Eric

0 Alan Chang over 7 years ago in reply to Eric Beljaars

TI__Intellectual 2490 points

Eric,

Customer would like to know the IC temperature at 100W delivery. the worse case is 5A on 2 path, 5*5*2*33 mohm = 1.65W power loss. Rjb = 30C/W, the temperature rising is 30*1.65 = 49.5C. The board temp. should be less than 75C, few margin. Becasue this is PCB layout related, customer hopes to know what temp. on EVM. Thanks.

0 Eric Beljaars over 7 years ago in reply to Alan Chang

TI__Mastermind 36756 points

Hi Alan,

I'm not sure what you're looking for. All relevant thermal information can be found in the datasheet. Also, your worst case calculation is incorrect. Only one path can be on at a time in the 87D so your power loss will be half of what you calculated.

If this answers your question, PLEASE select This resolved my issue

Thank you,
Eric

0 Alan Chang over 7 years ago in reply to Eric Beljaars

TI__Intellectual 2490 points

Eric,

Thanks for your correction on power loss. What we need is the real IC temp. at 5A delivery on EVM. Can you help to get the data?

0 Eric Beljaars over 7 years ago in reply to Alan Chang

TI__Mastermind 36756 points

Hi Alan,

IC temperature will be largely dependent on the customer layout. We do not have a specification for this in the datasheet.

Thank you,
Eric

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TPS65987D: TPS65987D thermal information in 100W supporting