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BQ25730: question

Part Number: BQ25730
Other Parts Discussed in Thread: BQ25731,

Hello Experts,

My customer has question as follows. Would you answer it, please?
1. Customer system need to charge when system is discharging. At this time, customer should choose BQ25731 instead BQ25730?
2. If customer does not connect any load at VSYS, capacitors(red portion in below figure) are needed, correct?
3. Do you have a simulation tool to select capacitors, inductor and FET for DCDC convert?



Best Regards,
Fujiwara