LP8867C-Q1: How to calculate Ploss on LP8867C-Q1 chip

?? ?

Part Number: LP8867C-Q1

HI：

Using LP8867C-Q1 to drive 11 series and 4 parallel LED strings, each string is 80mA/35V.

How to calculate PLOSS on LP8867C-Q1? Because we need to know PLOSS to calculate Tj.

Thanks

0 Xiaoguang over 3 years ago

May i know what is input voltage range?

0 ?? ? over 3 years ago in reply to Xiaoguang

input voltage is 9~16V，typical value is 12V

0 Xiaoguang over 3 years ago in reply to ?? ?

It's around 0.8W power loss for TPS8867.

0 ?? ? over 3 years ago in reply to Xiaoguang

Can you provide the calculation method? Thanks.

0 Xiaoguang over 3 years ago in reply to ?? ?

Sorry, 0.8W was for 3channel . 4 channel is ~1.3W. (0.27+0.65+0.32) w

0 ?? ? over 3 years ago in reply to Xiaoguang

Is there a calculation table? Can you provide us with this calculation table? Facilitate the calculation of different projects

0 Xiaoguang over 3 years ago in reply to ?? ?

Please send email to zhiqian-wu@ti.com and request for the tool.

0 ?? ? over 3 years ago in reply to Xiaoguang

Email has been sent，Thanks.

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