STBCFG01JR STMicroelectronics

STBCFG01 Switch mode single cell Li+ battery charger with OTG boost, voltage mode fuel gauge and LDO Datasheet - production data Interrupt output pin Flip Chip package, 25 bumps (2.3 x 2.2 mm) Applications Mobile phones Smart phones Description Features The STBCFG01 is a switching battery charger High efficiency switching battery charger integrating the necessary functions to charge single cell Li-Ion batteries, monitor the battery 2 MHz or 3 MHz switching frequency charge and generate 5 V to supply USB OTG bus 1.2 A max. charging current powered devices. 20 V tolerant input with OVP Programmable input current limitation The IC also integrates the LDO regulator to and dynamic input current limit support system boot in dead battery conditions. Battery overvoltage protection The battery charger features a smart input Auto-recharge current limit: the maximum input current can be Integrated current sensing resistor selected through IC and if the input voltage USB compatible drops below a programmable threshold, the input Voltage mode fuel gauge current is reduced even if the selected maximum External sensing resistor is not needed current limit has not been reached yet. The Battery swap detection through ID dynamic input current limit can be disabled. resistor An automatic input pre-bias load makes the Low battery voltage and low SOC device suitable for applications using voltage programmable alarms sources with a minimum external load for the 50 mA LDO for system boot in dead battery right regulation. condition USB OTG VBUS generation (500 mA) The STBCFG01 also integrates a voltage mode USB overvoltage protection fuel gauge to provide the state of charge Programmable battery overcurrent evaluation without the current sensing resistor. protection Automatic 60 mA input pre-bias IC compatible control interface April 2016 DocID026474 Rev 3 1/37 www.st.com This is information on a product in full production. Contents STBCFG01 Contents 1 Application schematic .................................................................... 5 2 Pin configuration ............................................................................. 6 3 Maximum ratings ............................................................................. 8 4 Electrical characteristics ................................................................ 9 5 Operation description ................................................................... 15 5.1 Battery charger ................................................................................ 15 5.1.1 Input current limit .............................................................................. 16 5.1.2 Dynamic input current limit (DICL) ................................................... 16 5.1.3 Automatic recharge .......................................................................... 17 5.1.4 Battery detection ............................................................................... 17 5.1.5 Battery overvoltage protection .......................................................... 18 5.2 OTG boost....................................................................................... 18 5.3 LDO regulator .................................................................................. 19 5.4 Pre-bias ........................................................................................... 19 5.5 Fuel gauge ...................................................................................... 20 5.5.1 Operating mode ................................................................................ 20 5.5.2 Battery connection ............................................................................ 20 5.5.3 Low battery alarm ............................................................................. 20 5.5.4 Battery swap ..................................................................................... 21 5.6 Thermal shutdown ........................................................................... 21 5.7 Shutdown mode .............................................................................. 22 5.8 Watchdog ........................................................................................ 22 5.9 Alarms ............................................................................................. 22 6 IC compatible interface registers ................................................ 23 6.1 Fuel gauge registers ....................................................................... 24 6.2 Charger/OTG/LDO registers ........................................................... 26 7 Package information ..................................................................... 33 7.1 Flip Chip 25 (2.3x2.2 mm) option H package information ............... 33 8 Ordering information ..................................................................... 35 9 Revision history ............................................................................ 36 2/37 DocID026474 Rev 3