TPS53515: about ROR Fsw setting

Tsukui Yusuke

Guru 21930 points

Part Number: TPS53515

Hi,

Could you tell me about ROR setting?
In the data sheet the following values are recommended.
If I keep the RDR value, is it OK to use any values for Rrf_H and Rrf_L?
And,Please tell me the tolerance range of allowable accuracy.

Best regards,
Yusuke/Japan Disty

over 8 years ago

0 Tsukui Yusuke over 8 years ago

Guru 21930 points

Hi,

Can I get the information?
I will attach the waveform.
If you need more information or if I should clarify my comment ,
please let me know.

Best Regards,
Yusuke/Japan Disty

0 JohnTucker over 8 years ago in reply to Tsukui Yusuke

TI__Guru**** 191445 points

The user guide has the ratio and frequency resistor values on page 7. Best to keep 1% tolerance. I have seen many similar questions on those family devices and still don’t know why this table in the datasheet instead of user guide.

www.ti.com/.../sluuas1b.pdf

You should be able to use different values so long as the ratio is correct. I probably would not use extremely high (Mohm) or extremely low (hundreds of ohms) though.

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TPS53515: about ROR Fsw setting