STBCFG01 datasheet(17/37 Pages) STMICROELECTRONICS

17 / 37 page

STBCFG01

Operation description

DocID026474 Rev 3

17/37

Figure 5: DICL activation

When a valid input source is connected to DCIN, DICL is enabled only if the input voltage is

higher than VDICL for a deglitch time (tDICL = 100 ms). The user can check the enabling

status of DICL function reading DICL status bit. Once DICL is enabled it can be disabled

through DICL_en bit.

Figure 6: DICL enable strategy

5.1.3

Automatic recharge

When the charging cycle is over, the device keeps monitoring the battery voltage: if the

voltage drops below the auto-recharge threshold (VRCHG = VFLOAT - 120 mV), a new

charging cycle starts to keep the battery at maximum capacity. The automatic recharge

function can be disabled through I²C.

5.1.4

Battery detection

The battery charger IC features a battery detection function to check if a battery is inserted

before starting the charging cycle and to make sure that charging termination is not

triggered because of a battery disconnection. If the battery is not detected when the input

voltage is valid, the device keeps running the detection sequence until a battery is inserted.

The battery detection result is reported by DET_ok bit. If the battery detection function or

RID comparator detects a battery disconnection, BAT_Fail interrupt is generated. See the

battery detection algorithm flowchart for more details.

STBCFG01 Datasheet(PDF) 17 Page - STMicroelectronics