LP8867-Q1: LED current setting

Jeffrey Chung1

Part Number: LP8867-Q1

Hi,

I got the design calculation excel file for design of LP8867-Q1 from TI engineer. But there is a difference between the calculated ILED by equation 5 of datasheet and the calculated ILED by design calculation file. For example, if RISET is set to 20 kΩ, ILED is 120 mA per channel in datasheet. otherwise, if RISET is set to 20 kΩ, ILED is 154.88 mA per channel in design calculation file. Please let me know the reason why.

Regards,

over 4 years ago

0 Charles-Chen over 4 years ago

TI__Genius 11836 points

Hi Jeffrey,

The datasheet will be correct then although I don't know the version of your design calculation file. Please also close your other threads if you don't have any more questions.

0 Jeffrey Chung1 over 4 years ago in reply to Charles-Chen

Genius 3280 points

Hi Charles,

The design calculation file name is LP8867-9(C)-Q1_Design-Cal_V1p0.xlsx. Is there the latest version of design calculation file?

Regards,

0 Charles-Chen over 4 years ago in reply to Jeffrey Chung1

TI__Genius 11836 points

Hi Jeffrey,

We have latest version. Please get it through TI FAE.

0 Jeffrey Chung1 over 4 years ago in reply to Charles-Chen

Genius 3280 points

Hi Charles,

Okay, Let me check it through my regional TI FAE.

Regards,

0 Charles-Chen over 4 years ago in reply to Jeffrey Chung1

TI__Genius 11836 points

Hi Jeffrey,

I will deliver the tool to him and please also help close this thread.

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LP8867-Q1: LED current setting