Hi Experts,
Good day. Appreciate it if you could help with the design inquiry of the customer.
Please see below the customer's full transcript.
"We are having some trouble setting up BQ24040. The IC is not regulating properly.
I changed values from Riset and I got different Vout results but none of them seem to be correct.
I tried:
Riset= 1k and Vout is 4,5V
Riset= 8k2 and Vout is 2,6V
"As far as I understand this value should only affect the current provided and Vout should remain always 4.2V, shouldn't it?"
We're we want to charge a Lipo battery through a wireless charger. The input is 5V and this one is capable to charge at 5W. We tried the same result with a couple of lipo batteries, one at 3.7V and the other one at 3.9V.
We tried the same input and the same output with another charger circuit and it worked. That's why we don't know what might be happening in this new circuit, which is almost the same as the other.
Here I attach the schematic. There's no Q2 neither R13 and Q2.2 and Q2.3 are now shorted."
Thank you for your help.
Kind regards,
Marvin
