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Applications Guide E-3
shows the actual performance of typical LI, NiMH, and NiCd handset battery
packs with a dynamic load, shown in
, simulating a GSM handset during
transmission. The pulse minimum voltage is the voltage at the battery terminals during the
transmit, or high current portion, of the data frame. The average battery voltage is the voltage
across the terminals measured with a 6½ digit DMM at approximately 50 readings per second.
The figure shows the pulse minimum voltage reaches the shutdown threshold, 5.7V, before
average battery voltage. The difference between the pulse minimum and average battery voltage
also varies as a function of the electronic resistance with time, shown in
of the battery
packs and ranges between 200–500mV. The results of these measurements prove that the
impedance of the battery must be considered when evaluating handset performance, especially
near the end of life for the battery pack.
NOTE
shows the average and minimum battery pack terminal voltage during a
load pulse from a dynamic load simulating a GSM phone.
Figure E-2
5.00
5.50
6.00
6.50
7.00
7.50
8.00
8.50
9.00
0.0
2.0
4.0
6.0
8.0
10.0
Battery Voltage
Volts
Time
hrs
5.7V
6.59
8.15
7.18
Li ion AverageBattery Voltage
NiMH Average Battery Voltage
NiCd Average Battery Voltage
Li ion Battery Pulse Minimum Voltage
NiMH Battery Pulse Minimum Voltage
NiCd Battery Pulse Minimum Voltage
Actual battery pack terminal voltage during GSM phone simulation
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
Содержание 2302
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Страница 178: ...8 22 Status Structure Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Страница 184: ...9 6 Common Commands Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Страница 258: ...14 20 Calibration Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
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Страница 296: ...16 32 Replaceable Parts Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Страница 297: ...A Specifications Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Страница 298: ...A 2 Specifications Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Страница 299: ...B ErrorandStatusMessages Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
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Страница 313: ...D CalibrationProgram Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Страница 318: ...D 6 Calibration Program Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Страница 326: ...E 8 Applications Guide Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Страница 330: ...F 4 Model 2302 Specifics Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
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