January 2009 Rev 11/21
STC3100
Battery monitor IC with Coulomb counter/gas gauge
Features
■Battery voltage monitoring ■Internal temperature nsor
■Coulomb counter with 12/14-bit AD converter, +/- 80mV input voltage range
■Internal or external 32768Hz time ba ■I2C interface for gas gauge monitoring and device control ■32-RAM bytes
■8-byte unique device ID ■
One general-purpo I/O
垂眼妆Applications
■Cellular phones, PDA, MP3 players, cordless phones
■
Digital cameras, USB appliances, Bluetooth devices
Description
The STC3100 monitors the critical parameters of a single-cell Li-Ion battery (voltage, temperature and current) and includes hardware functions to implement a gas gauge for battery charge monitoring, bad on a programmable 12- to 14-bit A/D converter. With a typical 30 milliOhms external n resistor, the battery current can be up to 2.5 A and the accumulator system provides a capacity up to +/-7000 mAh with a resolution of 0.2 mAh.
The device is programmable through the I2C
interface.
MiniSO-8
(Plastic micropackage)
DFN8 3x3
(Plastic micropackage)1234
5
678IO0SDA SCL
GNDmy147
VIN ROSC VCC CG Pin connections (top view)
Block diagram STC3100
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1 Block diagram
script
STC3100Pin assignment
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2 Pin assignment
Note:
I: input O: output
OD: open drain A: analog D: digital
Table 1.
STC3100 pin description
Pin #Pin name Type Function
1IO0I/OD General-purpo I/O
2ROSC I_AD Oscillator bias resistor or external 32kHz clock for gas
gauge 3SDA I/OD I2C rial data 4SCL I_D I2C rial clock
5GND Ground Analog and digital ground 6CG I_A Gas gauge current n input 7VCC Supply Power supply
8
VIN
I_A
Battery voltage n input
Absolute maximum ratings and operating conditions STC3100 3 Absolute maximum ratings and operating conditions
Table 2.Absolute maximum ratings
Symbol Parameter Value Unit
Vmax Maximum voltage on any pin7V
Vio Voltage on I/O pins-0.3 to 7V
Tstg Storage temperature-55 to 150°C
Tj Maximum junction temperature150°C
ESD Electrostatic discharge (HBM human body model)2kV Table 3.Operating conditions
Symbol Parameter Value Unit
Vcc Operating supply voltage on V CC 2.7 to 5.5V
Vin Input voltage on Vin0 to Vcc V
曼德拉逝世Vmin Minimum voltage on V CC for RAM content retention 2.0V
Toper Operating free air temperature range-40 to 85°C
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annie lennoxSTC3100Electrical characteristics
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4 Electrical characteristics
stressTable 4.
Electrical characteristics (2.7V < V CC < 4.5V, -20° C to 70° C)
Symbol Parameter北京教育网站
Conditions
了不起的盖茨比 原声Min
英文翻译在线转换器Typ
Max
Units
Supply I CC Operating current consumption Average value over 4s 100uA Istby Current consumptio
n in standby standby mode, inputs=0V 2uA Ipdn Current consumption in power down V CC < UVLOth, inputs=0V 1uA UVLOth Undervoltage threshold
(V CC decreasing)
2.5
2.6 2.7
V UVLOhyst Undervoltage threshold hysteresis 100mV POR
Power-on ret threshold
(V CC decreasing) 2.0
V
Gas gauge A/D converter Vin_gg Input voltage range -80
+80mV Iin Input current for CG pin 500
nA ADC_res
AD converter granularity沃尔得
12 bits
13 bits 14 bits 47.0823.5411.77
uV uV uV ADC_offt AD converter offt
CG = 0V 12 bits 13 bits 14 bits -2-2-3
223
LSB LSB LSB ADC_time AD conversion time (32768Hz clock)
12 bits 13 bits 14 bits
125250500
ms ms ms ADC_acc AD converter gain accuracy at full scale 25°C
over temperature range 0.51
%%Fosc Internal time ba frequency Rosc =200k Ω, 0.1%32768
Hz Osc_acc Internal time ba accuracy 25°C, V CC =3.6V over temperature and voltage ranges
22.5%%Fosc_ext External time ba frequency range 30
70
kHz Cur_res Current register LSB value 11.77
uV Chg_res Charge register LSB value (32,768Hz clock)
=Cur_res*2^12*0.5/3600
6.70
uV .h Global_CG_acc
Gas gauge accuracy (not including the external n resistor tolerance)Using internal time ba Using external time ba
3.51
%%
