Telit GM862-QUAD/-QUAD-PY
Hardware User Guide
1vv0300692, Rev. ISSUE#0, - 04/10/2005
Reproduction forbidden without DAI Telecom written authorization – All Right reserved – Right of modification reserved
page 14 of 69
An example of battery charger can be:
NOTE: In this particular application the battery charger input current must be limited to less than 1A.
This can be done by using a current limited wall adapter as the power source.
For your convenience in the EVK there's also a current unlimited input, where the input source is not
limited in current and the drawn current is limited to about 0,5A by a MOSFET in the EVK.
3.2.2Thermal Design Guidelines
The thermal design for the power supply heat sink should be done with the following specifications:
•
Average current consumption during transmission @PWR level max (rms): 350mA
•
Average current consumption during transmission @ PWR level min (rms): 100mA
•
Average current during Power Saving:
4mA
•
Average current during idle (Power Saving disabled)
17mA
NOTE: The average consumption during transmissions depends on the power level at which the
device is requested to transmit by the network. The average current consumption hence varies
significantly.
TIP: The thermal design for the Power supply should be made keeping a average consumption at the
max transmitting level during calls of 350mA rms.
Considering the very low current during idle, especially if Power Saving function is enabled, it is
possible to consider from the thermal point of view that the device absorbs current significantly
only during calls.
