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STBC21 Datasheet, PDF (7/54 Pages) STMicroelectronics – LI+ battery charger with thermal regulation
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STBC21
Block diagram
Figure 2. Typical application schematic
VCC
VIN
VREF
C1
R6 R7
VCC
STBC21A
VBAT_SNS
BAT
VREF
RES1 (I2C Clock)
RES2 (I2C Data)
TEMP
RES3 (Reserved)
RLED1
LED1
LED2
D1
DR2 LED2
GND
ISET
VREF
C4
C3
R3
R4
R5
C5
R1
PHC
VCC
VCP
R8
R2
C2
TO AC-DC
BATTERY PACK
BAT
Li+
Protection
Circuit
Li-Ion
Battery
TEMP
GND
NTC
AM10434v 2
Table 2. External components
Symbol
Parameter
Min.
C1
Ceramic capacitor SMD
1
C2
Ceramic capacitor SMD
C3
Ceramic capacitor SMD
C4
Ceramic capacitor SMD
C5
Ceramic capacitor SMD
R1
Resistor
R2
Resistor
R3
Resistor
R4
Resistor
R5
Resistor
R6
Resistor
R7
Resistor
R8
Resistor
RLED1, RLED2 Resistor
D1
LED Kingbright L-934HD
D2
LED Kingbright L-934GD
1. Time constant R5*C5 must be less than 20 msec.
2. This value refers to a fast-charge current of 100 mA.
3. Time constant must be chosen taking into account compensation loop.
Typ.
TBD
0.1
10
TBD (1)
10 (2)
TBD
100
0
TBD (1)
4.7
4.7
TBD (3)
90
Max.
10
Unit
µF
µF
µF
µF
kΩ
kΩ
kΩ
Ω
kΩ
kΩ
Ω
Doc ID 023256 Rev 1
7/54
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