User's Manual Part 3

Chapter 8: Specifications
Electrical Specifications
280 iKôn Rugged PDA (Windows Mobile 6) User Manual
8.3.2 Electrical Specifications
8.3.3 Environmental And Safety Specifications
Description Specification
Communication interface Smart Management Bus (SMB)
Internal Battery Data Dependent upon cell parameters. Vendor to calculate and provide
data.
Charge control CV 4.2V, CC5.0A- dependant on cell manufacturer, Pre-charge
100mA, Current taper 100 - 250mA
Fuel gauge Texas Instruments BQ27350PW
Accuracy: +/- 1% of remaining battery capacity
Resolution: 10 steps minimum
Calibration Self Calibrating
Current accuracy Charge/discharge: +/- 5%
Voltage accuracy Charge/discharge: +/- 1%, measured at cell stack
Battery temperature +/- 5°C (from -20°C to +60°C)
Battery Authentication Texas Instruments BQ26100 SHA-1 encryption
Series resistance Max. 180m (contact + shunt + safety components + cells)
Internal electronics consump-
tion
Normal operation 300µA Max
Power-down Mode 20µA Max
Description Specification
Internal Protection Over-temperature: thermal fuse disconnect above 90°C
Over-voltage: temporary disconnect if any cell voltage > 4.40V (discharge not inhibited)
Electronics shall support 5.0A continuous load at 60°C without tripping the protection
circuit.
Over-current: temporary disconnect above 10.0A for > 20ms
[shorting of battery terminals shall not damage the electronics or cells. Over current pro-
tection will have two series devices - Polyswitch/ fuse and switch FETs.]
Under-voltage: temporary disconnect if total cell voltage < 2.75V (protection circuit to
enter power-down mode and gas gauge function should be prohibited, but data shall not
be lost as long as one cell is over 1.5V.)