Product: Wireless Mouse for Gaming
Use Case:
· The mouse can be connected to PC and used as a wired mouse when the battery is removed.
· The battery charger IC should be still able to power up the MCU in the mouse for normal operation.
· In battery IC's SUSPEND mode, the IN to OUT path is cut off, this will mean that the mouse will not work.
· Workaround is to force battery IC to be in 2 modes only, 100mA or 500mA, never in SUSPEND mode.
· The question is can the product still be USB compliant? Intention is to achieve USB Suspend mode by pulling CE pin high to disable the charging and let IN to OUT path connected. This is on the assumption that the total current drawn is less than USB Suspend current requirement of 2.5mA. The load after the battery charger during USB suspend will be about 2mA.
· What is the current drawn from the IN pin when charge is disabled and without load (/CE = Hi; EN1 = EN2 = Lo)? From the datasheet, it wasn’t clear. Do we have any data to show?
Lastly, if I set Ichg to 1A, the termination current is 0.1A right? I have this concern that the battery will never be fully charged.
Any workaround without the need to use bq24074?
Poh Leong
