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TUSB4020BI: About R1 and R2 of USB_VBUS

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Guru 21045 points
Part Number: TUSB4020BI

Hi Team,

 

I understand that the role of USB_VBUS is USB upstream port power monitor and your recommended values are R1= 90.9kΩ ±1%, R2= 10kΩ ±1%.

However, I would like to change R1 and R2 values from your recommended values to R1=909Ω, R2=100Ω.

 

I guess that If USB_VBUS voltage is within the recommended range(0V to 1.155V), R1 and R2 can be changed.

-If R1=90.9kΩ and R2=10kΩ, USB_VBUS voltage is 0.495V

-If R1=909Ω and R2=100Ω, USB_VBUS voltage is 0.495V

 

Is my understanding correct?

If No, could you please let us know reason and any concern?

(For example; if R1 and R2 values are small, abnormal operation occurs etc.)

 

Regards,

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