Tool/software:
Hi Team,
We are getting audible noise while we disconnect the battery from the charger IC(Charging Enabled) but the Load is connected in SYS pins.
If the battery is charging and Load current also consumed from SYS pin, There is no audible noise. But when we disconnect only battery without disturbing the SYS load we could hear the audible noise.
Load current is around 300mA
When charger current and Load current are consumed the switching frequency is 1.5MHz. Below waveform is from PMID pin.
When we disconnect only battery the wave form in PMID pin as in the image. (Charger IC is trying to charge battery in 9.3KHz). In this stage we are having audible noise.
More Details,
VSET- set for 8.4V
ILIM- 0Ohm mounted
Icharge- 2.49KOhm mounted
Thanks in advance..