Hi Team,
Below is our charging curve chart.
I think our CC to CV mode threshold is not match to datasheet. Only around 3.8V.
Our RVSET is 58k, we expected that the threshold should 4.2V.
Can you let me know which item should I check?
ps. I measured the BAT pin on chip.
Roy
Hi Ning,
Scale is different. We zoom in the x-axis.
Schematic:R302 is modified to 470ohm now, so the charge current is ~1.4A.
Do you think the root cause is the voltage at ICHG pin, is there any possible that this would be influence by any other pins?
I tried to provide different voltage on ICHG pin, and I found I cannot control it, though the current did change when I change the VICHG.
Please see below chart, every time I change the VICHG (orange line, circled in red), the current (blue line) will change, but it is not rising the voltage, the current rise at the same time
Like when the power supply is set from 0.8 to 0.82V (the 2nd circle), the current drops, then I set it from 0.82 to 0.6V, the current rises up.
It seems that although VICHG controls the current, but there is something internally will affect the current, but I am not sure what it is.
Roy
