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TPS92314: ILED accuary

Part Number: TPS92314

Hello

My customer chosen TPS92314 for their new project  on 2019  with following spec.

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Non-isolated

Input AC220V

LED voltage :60V

LED current:350mA  +/- 5%

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Q1

What factor affects to  final product's accuracy * as TPS92314 IC's spec? ( excluding external conditions i.e. components tolerance / input voltage tolerance..)

I think Vref affects to accuracy , but anything else?

( * Customer's goal is +/- 5%,... it should be very tough)

 

Q2


ILED depends on VREF accuary  : TYP 0.14V, does not specifined in electrical  characteristics in d/s.

Can we assume Vref accuary is  0.14V +/- 6% ?   ( Why 6% ==> Visns specified as 1.15V(TYP)/1.22V(MAX) in the data sheet )

 

Q3  

We have to trim Risns if ILED accuary is necessary?

Please give your opinion about trimming.

 

 

Thank you for your support!!

Best Regards