Hi there!
We are using BQ24610 for power management of out portable product, our SCH is referring Figure19 of datasheet.
In our application, voltage on power net "System" needs soft-start( ~ tens to hundreds of miliseconds), as I marked in red circle.
I did read in datasheet section 9.3.8 last paragraph that "internal gate drive provide break-before-make logic and allow a soft start at turn-on of either FET.The soft-start time can be further increased by putting a capacitor from gate to source of the P-channel power MOSFETs". This means C14 and C15 are used for adjusting the ramping time(T_rising) of PMOS's output.
My question:
1. What is the soft-start time with or without C14 and C15? Is there any quantitative description about the capacitance and T_rising? So we could place the proper cap instead of trying different values.
2. Or is there test waveforms which showing T_rising of MOSFET ouput? Not found this info in EVM doc SLUU396A.
Thanks!