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BQ2063 Datasheet(PDF) 7 Page - Texas Instruments |
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BQ2063 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 58 page  bq2063 SBS v1.1-COMPLIANT Li-ION GAS-GAUGE IC WITH PROTECTOR INTERFACE SLUS468E– MAY 2001 – REVISED APRIL 2002 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 functional description (continued) current The SRC input of the bq2063 measures battery charge and discharge current. The SRC ADC input converts the current signal from the series sense resistor and stores the result in Current( ). The full-scale input range to SBC is limited to ±250 mV. temperature The bq2063 can use its internal sensor or an external thermistor to develop the temperature reading, depending on the programming of the EXTH bit in Pack Configuration, EE 0x3f. The TS input of the bq2063 in conjunction with an NTC thermistor measures the battery temperature as shown in Figure 13. The bq2063 reports temperature in Temperature( ). THON may be used to switch the bias current through the external thermistor when the bq2063 samples the TS input. THON is low impedance for 60 ms when the temperature is measured, and high impedance otherwise. gas gauge operation general The operational overview in Figure 5 illustrates the gas gauge operation of the bq2063. Table 2 describes the bq2063 registers. Charge Efficiency Compensation Charge Current + Inputs Remaining Capacity (RM) Discharge Current Temperature Compensation Self-Discharge Timer – – ≤ + Full Charge Capacity (FCC) Discharge Count Register (DCR) Qualified Transfer Temperature, Other Data Main Counters and Capacity Reference (FCC) Outputs Chip-Controlled Available Charge LED Display Two-Wire Serial Port – + + Battery Load and Light Discharge Estimate Figure 5. bq2063 Operational Overview |
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