Dear expert,
My customer is evaluating BQ24725A. Thier circuit diagram design is similar to the following figure in the datasheet.
The logic for the Buck circuit of 24725A is turning on REGN to charge capacitor C7 through diode D1. Now the problem is that the current through D1 is large(reach to 2.16A, may be drawing current from an external 1uF capacitor) when the Q4 is turned on first, the duration is 128ns. And customer use the diode D1 specification IFSM: 0.6A, time 1s, datasheet didn't define the current-time curve.
So the first question is whether they choose the right diode or they need to improve the design?
The second question is about REGN's current limit. The typ value of the current limit of REGN 75mA defines the peak value or average value? If the Load of REGN exceeds this value, how is the LDO inside REGN protected? Will it shut down the LDO output? Thanks for your support.
CH1: Phase to ground CH2:REGN to ground CH4:D1 forward current