Datasheet

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FUNCTIONAL BLOCK DIAGRAMS
Bandgap,
Reference
andBias
Temperature
Compensated
PrecisionOscillator
Clock
Generator
EEPROM
RAM
SCPU
SystemI/O
andControl
Temperature
Sensor
ADC
2VCC
8SRP
7SRN
6BAT
5 HDQ
9 GPIO
1
RBI
3 VSS
bq27010
10 RGM
Autocalibration
and
Autocompensating
CoulombCounter
UDG−03040
UDG−04123
Bandgap,
Reference
andBias
Autocalibrationand
Autocompensating
CoulombCounter
Temperature
Compensated
PrecisionOscillator
Clock
Generator
EEPROM
RAM
SCPU
SystemI/O
andControl
Temperature
Sensor
ADC
2VCC
8SRP
7SRN
6BAT
4 SCL
9 GPIO
1 RBI
3 VSS
bq27210
5 SDA
10 RGM
FUNCTIONAL DESCRIPTION
bq27010 , bq27210
SLUS707B – APRIL 2006 – REVISED JANUARY 2007
The bqJUNIOR determines battery capacity by monitoring the amount of charge input to or removed from a
Li-Ion or Li-Pol battery. The bqJUNIOR measures discharge and charge currents, monitors the battery for low
voltage thresholds, and compensates for self-discharge, aging, temperature, and discharge rate. Current is
measured across a small value series resistor between the negative terminal of the battery and the pack ground
(see R
S
in Figure 3 ). Available capacity is reported with a resolution of 3.57 µVh. Time-To-Empty reporting in
minutes at standby, actual, and at-rate currents allows the requirements for host-based calculations to be greatly
reduced or eliminated; reading a single register pair provides useful and meaningful information to the end user
of the application.
7
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