BQ2063_15 Datasheet, PDF (7/60 Pages) Texas Instruments – SBS v1.1-COMPLIANT Li-ION GAS-GAUGE IC

Not Recommended For New Designs
bq2063
SBS v1.1ĆCOMPLIANT LiĆION GASĆGAUGE IC
WITH PROTECTOR INTERFACE
SLUS468E− MAY 2001 − REVISED APRIL 2002
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.
Inputs
Charge
Current
Battery Load and Light Discharge
Discharge Estimate
Current
Self-Discharge
Timer
Charge
Efficiency
Compensation
Temperature
Compensation
Main Counters and
Capacity Reference (FCC)
−−−
Remaining
+ _{Capacity ≤}
(RM)
Full
Charge
Capacity
(FCC)
+++
Qualified
Transfer
Discharge
Count
Register
(DCR)
Outputs
Temperature, Other Data
Chip-Controlled Two-Wire
Available Charge Serial Port
LED Display
Figure 5. bq2063 Operational Overview
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