STC3100 STMicroelectronics, STC3100 Datasheet
STC3100
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STC3100 Summary of contents
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... 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, based on a programmable 12- to 14-bit A/D converter. With a typical 30 milliOhms external sense resistor, the battery current can ...
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... Block diagram 1 Block diagram Figure 1. STC3100 internal block diagram VCC SCL SDA 2/21 1.2 V reference AD converter 11 bits (unsigned) Accumulators and control registers AD converter bits (signed) General-purpose I/O line I2C interface RAM & ID registers GND 32 kHz Oscillator time base Temp sensor MUX CG+ CG- AM00830 ...
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... STC3100 2 Pin assignment Table 1. STC3100 pin description Pin # Pin name 1 IO0 2 ROSC 3 SDA 4 SCL 5 GND VCC 8 VIN Note: I: input O: output OD: open drain A: analog D: digital Type I/OD General-purpose I/O Oscillator bias resistor or external 32 kHz clock for gas I_AD gauge I/OD I2C serial data I_D ...
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... Operating conditions Symbol Vcc Operating supply voltage on V Vin Input voltage on Vin Vmin Minimum voltage on V Toper Operating free air temperature range 4/21 Parameter Parameter CC for RAM content retention CC STC3100 Value Unit ° -55 to 150 C ° 150 Value Unit 2 ...
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... STC3100 4 Electrical characteristics Table 4. Electrical characteristics (2.7 V < V Symbol Parameter Supply I Operating current consumption CC Istby Current consumption in standby Ipdn Current consumption in power down UVLOth Undervoltage threshold UVLOhyst Undervoltage threshold hysteresis POR Power-on reset threshold Gas gauge A/D converter Vin_gg Input voltage range Iin ...
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... Vih Input logic high Vil Input logic low Vol Output logic low (SDA, IO0) 6/21 < 4.5 V, -20° 70° C) (continued) CC Conditions Min Vcc = 5 V Voltage measurement Temperature measurement =Vin -0.5 CC 1.2 Iol = 4 mA STC3100 Typ Max Units 2.44 mV 0.125 °C 250 ms +0 °C V ...
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... STC3100 5 Typical performance curves Figure 2. Standby current vs. temperature 1.6 Vcc=4.5V 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -50 - Temp (°C) Figure 4. Oscillator frequency accuracy vs. temperature 2.0 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 -2.0 -50 - Temp (°C) Figure 3. 0.6 0.4 0.2 0.0 -0.2 -0.4 -0 100 125 -50 Figure 5. 0.6 0.4 0.2 0.0 -0.2 -0.4 -0.6 - 100 125 Typical performance curves Current measurement accuracy vs. temperature Vgg=80mV - ...
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... Application information 6 Application information Figure 6. Example of an application schematic using the STC3100 Rosc IO voltage Table 5. External components list Name Rcg mΩ Rosc 8/21 ROSC STC3100 SCL SDA GND Value Tolerance 1% Gas gauge sense resistor 200 kΩ 0.1% Internal oscillator bias resistor 1 µ ...
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... STC3100 7 Functional description 7.1 Gas gauge The gas gauge is used to monitor the available battery capacity. The voltage drop across the external sense resistor is integrated during a conversion period and input to a 12- to 14-bit AD converter. The output conversion is accumulated into a 28-bit accumulator. The system controller can control the gas gauge and read the data (upper 16 bits of the accumulator) through the I2C control registers ...
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... I2C interface, giving a resolution of 0.2 mA.h. When the battery voltage falls below the under voltage lockout threshold at 2.7 V, the gas gauge system is stopped and the STC3100 stays in standby mode with minimum quiescent current. All registers are maintained down to 2.0 V. Below 2.0 V, the registers are reset to their default power-on value ...
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... Unique device ID The STC3100 provides a means to identify the battery pack or the subsystem. Each device has its own unique 8-byte ID made of an 8-bit part ID (value = 10h for the STC3100), a 48-bit random unique ID and an 8-bit CRC. The CRC-8 is calculated according to bytes REG_ID0 to REG_ID6 using the " 1" ...
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... The first bit must be high (START) followed by the device address and read/write bit control. Bits DevADDR0 to DevADDR2 are factory-programmable, the default device address value being 70h (AddrID0 = AddrID1 = AddrID2 = 0). The STC3100 then sends an acknowledge at the end of an 8-bit long sequence. The next 8 bits correspond to the register address followed by another acknowledge ...
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... STC3100 Figure 8. Read operation Master Slave Start Device addr W A Reg address 7 bits 8 bits Start bit = SDA falling when SCL = 1 Stop bit = SDA rising when SCL = 1 Restart bit = start after a start Acknowledge = SDA forced low during a SCL clock Figure 9. Write operation ...
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... Battery voltage value, bits 0-7 R Battery voltage value, bits 8-15 R Temperature value, bits 0-7 R Temperature value, bits 8-15 R Part type ID = 10h R Unique part ID, bits 0-7 R Unique part ID, bits 8-15 R Unique part ID, bits 16-23 R Unique part ID, bits 24-31 R Unique part ID, bits 32-39 R Unique part ID, bits 40-47 R Device ID CRC R/W General-purpose RAM register 0 ... R/W General-purpose RAM register 31 STC3100 ...
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... STC3100 Values held in consecutive registers (such as the charge value in the REG_CHARGE_LOW and REG_CHARGE_HIGH registers) must be read with a single I2C access to ensure data integrity possible to read multiple values in one I2C access, all values will be consistent. The charge data is coded in 2’s complement format, and the LSB value is 6.70 uV.h. ...
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... Package information 9 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. 16/21 STC3100 ® ...
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... STC3100 9.1 MiniSO-8 package information Figure 10. MiniSO-8 package mechanical drawing Table 12. Miniso-8 package mechanical data Ref ccc Dimensions Millimeters Min. Typ. Max. 1.10 0.15 0.75 0.85 0.95 0.22 0.40 0.08 0.23 2.80 3.00 3.20 4.65 4.90 5.15 2.80 3.00 3.10 0.65 0.40 0.60 0.80 0.95 0. 0.10 Package information Inches Min. Typ. Max. 0.043 0.006 0.030 0.033 0.037 0.009 0.016 ...
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... ddd 18/21 Dimensions Millimeters Min. Typ. Max. 0.80 0.90 1.00 0.02 0.05 0.55 0.65 0.80 0.20 0.18 0.25 0.30 2.85 3.00 3.15 2.20 2.70 2.85 3.00 3.15 1.40 1.75 0.50 0.30 0.40 0.50 0.08 STC3100 Inches Min. Typ. Max. 0.031 0.035 0.039 0.0008 0.0019 0.021 0.025 0.031 0.008 0.007 0.010 0.012 0.112 0.118 0.124 0.087 0.106 0.112 0.118 0.124 0.055 0.069 0.020 0.012 0.016 0.020 0.003 ...
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... STC3100 10 Ordering information Table 14. Order codes Part number STC3100IST STC3100IQT Temperature Package range MiniSO-8 -40°C, +85°C DFN8 Ordering information Packing Marking Tape & reel O201 19/21 ...
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... Revision history 11 Revision history Table 15. Document revision history Date 27-Jan-2009 20/21 Revision 1 Initial release. STC3100 Changes ...
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... STC3100 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...