STEVAL-ISQ008V1
Fuel gauge implementation based on the STM32F103x
Data brief
Features
■
Single-cell Li-Ion battery fuel gauge technology
■
Dual selectable power input source:
– USB connection or external DC power
source 5 V
■
Battery fuel capacity monitoring by on-chip 12bit ADC
■
Based on the Micro STM32 (ARM Cortex™-M3
core) family
■
RoHS compliant
Description
STEVAL-ISQ008V1
Fuel gauge technology is a smart system which
monitors battery capacity, predicting the
remaining capacity and displaying its status. The
basic unit of measurement used for battery
capacity is Coulomb counting, in which the
current flowing through the battery is continuously
monitored and integrated to calculate the
capacity.
Current measurement is done when the battery is
both discharging and charging. Therefore, both
the IN and OUT current are used to calculate the
remaining capacity of the battery.
Battery capacity is measured in mAh.
January 2011
Doc ID 18364 Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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Schematics
Figure 1.
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Doc ID 18364 Rev 1
STEVAL-ISQ008V1
Figure 2.
Schematics
Power section
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Schematics
Figure 3.
STEVAL-ISQ008V1
Operational amplifier section
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Figure 4.
USB section
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Doc ID 18364 Rev 1
STEVAL-ISQ008V1
Figure 5.
Schematics
LCD section
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Figure 6.
JTAG-Connectors section
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Doc ID 18364 Rev 1
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Revision history
2
STEVAL-ISQ008V1
Revision history
Table 1.
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Document revision history
Date
Revision
10-Jan-2011
1
Changes
Initial release.
Doc ID 18364 Rev 1
STEVAL-ISQ008V1
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