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
Features
High efficiency switching battery charger
2 MHz or 3 MHz switching frequency
1.2 A max. charging current
20 V tolerant input with OVP
Programmable input current limitation
and dynamic input current limit
Battery overvoltage protection
Auto-recharge
Integrated current sensing resistor
USB compatible
Voltage mode fuel gauge
External sensing resistor is not needed
Battery swap detection through ID
resistor
Low battery voltage and low SOC
programmable alarms
50 mA LDO for system boot in dead battery
condition
USB OTG V
BUS
generation (500 mA)
USB overvoltage protection
Programmable battery overcurrent
protection
Automatic 60 mA input pre-bias
I²C compatible control interface
Description
The STBCFG01 is a switching battery charger
integrating the necessary functions to charge
single cell Li-Ion batteries, monitor the battery
charge and generate 5 V to supply USB OTG bus
powered devices.
The IC also integrates the LDO regulator to
support system boot in dead battery conditions.
The battery charger features a smart input
current limit: the maximum input current can be
selected through I²C and if the input voltage
drops below a programmable threshold, the input
current is reduced even if the selected maximum
current limit has not been reached yet. The
dynamic input current limit can be disabled.
An automatic input pre-bias load makes the
device suitable for applications using voltage
sources with a minimum external load for the
right regulation.
The STBCFG01 also integrates a voltage mode
fuel gauge to provide the state of charge
evaluation without the current sensing resistor.
April 2016
DocID026474 Rev 3
1/37
www.st.com
This is information on a product in full production.
Contents
STBCFG01
Contents
1
2
3
4
5
Application schematic .................................................................... 5
Pin configuration ............................................................................. 6
Maximum ratings ............................................................................. 8
Electrical characteristics ................................................................ 9
Operation description ................................................................... 15
5.1
Battery charger................................................................................ 15
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
Input current limit .............................................................................. 16
Dynamic input current limit (DICL) ................................................... 16
Automatic recharge .......................................................................... 17
Battery detection ............................................................................... 17
Battery overvoltage protection .......................................................... 18
5.2
5.3
5.4
5.5
OTG boost....................................................................................... 18
LDO regulator.................................................................................. 19
Pre-bias ........................................................................................... 19
Fuel gauge ...................................................................................... 20
5.5.1
5.5.2
5.5.3
5.5.4
Operating mode ................................................................................ 20
Battery connection ............................................................................ 20
Low battery alarm ............................................................................. 20
Battery swap ..................................................................................... 21
5.6
5.7
5.8
5.9
Thermal shutdown ........................................................................... 21
Shutdown mode .............................................................................. 22
Watchdog ........................................................................................ 22
Alarms ............................................................................................. 22
Fuel gauge registers ....................................................................... 24
Charger/OTG/LDO registers ........................................................... 26
Flip Chip 25 (2.3x2.2 mm) option H package information ............... 33
6
I²C compatible interface registers ................................................ 23
6.1
6.2
7
8
9
Package information ..................................................................... 33
7.1
Ordering information..................................................................... 35
Revision history ............................................................................ 36
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DocID026474 Rev 3
STBCFG01
List of tables
List of tables
Table 1: Typical bill of material (BOM)........................................................................................................ 5
Table 2: Pin description .............................................................................................................................. 6
Table 3: Absolute maximum ratings ........................................................................................................... 8
Table 4: Thermal data ................................................................................................................................. 8
Table 5: Electrical characteristics ............................................................................................................... 9
Table 6: Register map............................................................................................................................... 23
Table 7: Fuel gauge mode register (address: 00h) .................................................................................. 24
Table 8: FG_CTRL register (address: 01h) .............................................................................................. 24
Table 9: SOC register LSB (register address: 02h) .................................................................................. 25
Table 10: SOC register MSB (register address: 03h) ............................................................................... 25
Table 11: VBAT register LSB (register address: 08h) .............................................................................. 25
Table 12: VBAT register MSB (register address: 09h) ............................................................................. 25
Table 13: OCV register LSB (register address: 0Dh) ............................................................................... 25
Table 14: OCV register MSB (register address: 0Eh) .............................................................................. 25
Table 15: VM_CNF register LSB (register address: 11h) ......................................................................... 25
Table 16: ALARM_SOC register (address: 13h) ...................................................................................... 26
Table 17: ALARM_Voltage register (address: 14h) .................................................................................. 26
Table 18: CHG_Cfg1 register ................................................................................................................... 26
Table 19: CHG_Cfg2 register (address: 91h) ........................................................................................... 26
Table 20: CHG_Cfg3 register (address: 92h) ........................................................................................... 27
Table 21: CHG_Cfg4 register format (register address: 93h)................................................................... 28
Table 22: CHG_Cfg5_OTG_Status register format (register address: 94h) ............................................ 28
Table 23: CHG_Status1 register format (register address: 95h) .............................................................. 29
Table 24: CHG_Status2 register format (register address: 96h) .............................................................. 30
Table 25: Int_Enable_1 register format (register address: 97h) ............................................................... 30
Table 26: Int_Enable_2 register format (register address: 98h) ............................................................... 30
Table 27: Int_Latch_1 register format (register address: 99h) ................................................................. 31
Table 28: Int_Latch_2 register format (register address: 9Ah) ................................................................. 32
Table 29: Flip Chip 25 (2.3 x 2.2 mm) option H package mechanical data .............................................. 34
Table 30: Ordering information ................................................................................................................. 35
Table 31: Document revision history ........................................................................................................ 36
DocID026474 Rev 3
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List of figures
STBCFG01
List of figures
Figure 1: STBCFG01 application schematic .............................................................................................. 5
Figure 2: Pin connections (top view) ........................................................................................................... 6
Figure 3: Simplified charger architecture .................................................................................................. 15
Figure 4: CC/CV charging cycle ............................................................................................................... 16
Figure 5: DICL activation .......................................................................................................................... 17
Figure 6: DICL enable strategy ................................................................................................................. 17
Figure 7: Battery charger flowchart ........................................................................................................... 18
Figure 8: Pre-bias enable strategy............................................................................................................ 19
Figure 9: Battery swap detection .............................................................................................................. 21
Figure 10: Flip Chip 25 (2.3x 2.2 mm) option H package outline ............................................................. 33
Figure 11: Flip Chip 25 (2.3 x2.2 mm) option H recommended footprint ................................................. 34
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DocID026474 Rev 3
STBCFG01
Application schematic
1
Application schematic
Figure 1: STBCFG01 application schematic
Table 1: Typical bill of material (BOM)
Component name
C1
C2
C3
C4
C5
C6
C7
C8
C9
L1
Size
0603
0603
0402
0603
0603
0603
0603
0603
0603
2.5 x 2.2 mm
Value
10 µF, 16 V
4.7 µF, 25 V
1 µF, 16 V
4.7 µF, 25 V
1 µF, 16 V
10 µF, 16 V
100 nF, 25 V
1 µF, 16 V
1 µF, 16 V
1 µH, 2.2 A
Supplier
MURATA
TDK
MURATA
TDK
MURATA
MURATA
MURATA
MURATA
MURATA
TDK
Part number
GRM188R61C106MA73D
C1608X5R1E475K080AC
GRM155R61C105KA12D
C1608X5R1E475K080AC
GRM185R61C105KE44
GRM188R61C106MA73D
GRM188R71H104KA93
GRM185R61C105KE44
GRM185R61C105KE44
VLS252012ET-1R0N
DocID026474 Rev 3
5/37
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