Hello Texas Instruments!
I have a BQ24295 circuit that seems to work flawlessly under all test conditions, except when I attempt to measure the charge current. By attaching a DMM in series with the low side of the battery, I am able to measure the load on VBAT when not charging, and I am able to measure the charge current when the battery is below the constant voltage portion of the charge cycle. However after the battery rises to the constant voltage level of 4.20, and the charge current drops to around 250mA, the LED on VSTAT begins blinking rapidly, the current draw measured on the DMM rapidly cycles between 90 to 250mA (fairly useless metric at that point, I know), and the VBAT voltage measured with an oscilloscope shows a square wave from 4.21V to 3.8V, with a frequency of 19Hz, 33ms up, 17ms down.
With the DMM removed from the circuit and the battery connected directly again, VBAT showed 4.16 and the bench power supply connected to VBUS showed 597mA draw.
The registers read out these values the entire time...
REG[0] 0x5e
REG[1] 0x3b
REG[2] 0x20
REG[3] 0x11
REG[4] 0xb2
REG[5] 0x9c
REG[6] 0x93
REG[7] 0x4b
REG[8] 0xa4
REG[9] 0x80
REG[A] 0xc0
Do you know what may be occuring? I've wracked my brain and feel I must be missing something obvious at this point.