Other Parts Discussed in Thread: BQ24010,
Hi,
I am using "BQ24100RHLR " battery charger IC in my application. Here I have attached schematic
This circuit is working but i have little problem over power consumption in this IC. When the 3.7V Li-Po battery gets fully charged, charging is stopped and it doesn't deliver current. So as charger IC stops delivering current, Li-Po battery starts discharging for supplying current to the external circuit. After a while, Li-po discharges a little from full charge voltage and battery ic again starts charging. This should not be the ideal case. Li-Po battery acts as backup so that when Input power(12-15V) is not available, then only Li-Po should start discharging. when external input is present, Li-Po should not get discharged at all(except for little loss). To get it done, later i pulled down TTC(pin7) to ground so that battery charger should deliver current all the time(even when battery gets full) when external input is present. This also worked but i find problem that in this test, battery charger IC consumes around 20mA current all the time when all the loads to the battery charger is isolated. I mean isolating 3.3V regulator input from charger output and not connecting Li-Po to the battery charger output. This 20mA current at no load is too much current consumption as the 12-15V input comes from another Lead acid battery. So at this much current consumption in the battery charger ic itself will lead to major dron and will soon discharge the lead acid battery..