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BQ51013B-Q1: Questions about ROS、R1、RFOD、C1、C2 for BQ51013B-Q1 using.

Part Number: BQ51013B-Q1

Hello guys,

One of my customers is considering using BQ51013B-Q1 for their new products.

At this moment, they have the following questions.

Could you please give me your reply for them?

Q1. I know that C1 and C2 can be calculated by equation 6 on page32 of the device datasheet.

      Ls and Ls' are used for the equation.

      My understanding is that Ls is the actual inductance value of the inductor parts which used for the system.

      Is it correct? 

      If the answer is correct, what does Ls' means?

Q2. On page 34, we can see these description, "Default values of 20 kΩ for Ros and 196 Ω for RFOD are used. The final values need to be determined based on the FOD calibration.

       The tool for FOD calibration can be found on the BQ51013B-Q1 web folder under "Tools & software"".

      How we can get the Tool & software?

Q3. As our plan, our load power target is 250mW.  

      What value of current limit would be recommended for the load power? How can we calculate the current limit

Q4. Can /CHG(No.7) terminal be connected to a voltage which is not OUT(No.4) terminal via resistor?

       In other words, is it no problem that any voltage less than 20V apply to /CHG terminal when BQ51013B-Q1 is powered off?

Your reply would be much appreciated.

Best regards,

Kazuya.