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Working with Li-ion battery charging IC BQ24170

Other Parts Discussed in Thread: BQ24170, CSD15571Q2


I followed the sluu463 EVM schematic for the battery charging IC(BQ24170), I changed the some of the components in the schematic as I don't have that  components right now, the changed components are as follows

Q2,Q3= CSD15571Q2



R2,R15= Replaced with short

I checked the status pin,it is showing always 3.6V, I'm not able to understand what is the problem in the circuit. Except the above changes everything is same I followed. Please someone help me to find out the mistake.