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Iridium 9603 SBD Transceiver Product Developers Guide
Revision 1.0
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Table 9: DC Power Input Specifications
Parameter
Value
Supply Input Voltage Range
5.0V DC +/-0.2V**
Supply Input Voltage Ripple
< 40 mV pp
Typical Power Consumption at +5.0 VDC
Value
Idle Current (average*)
45mA
Idle Current (peak)
195mA
Transmit Current (peak)
1.5 A
Transmit Current (average*)
190mA
Receive Current (peak)
195mA
Receive Current (average*)
45mA
SBD message transfer - average current*
190 mA
SBD message transfer - average power*
<= 1.0 W
* Note: The average power consumption will vary depending on the view of the satellite constellation from the antenna.
**Note: Includes Tx Burst droop.
**Note: Includes Tx Burst droop.
The external power supply needs to guarantee the following:
The supply voltage droop over for a 8.3ms burst of 1.5A current should not be more than 0.2 Volts.
The power supply should limit the in-rush
1
current to 4 Amps maximum
The power source shall provide for over current protection in case of device malfunction.
The supply noise should be less than the limits in the following profile:
100 mVpp
from 0 to 50 kHz
5 mVpp
at 1 MHz measured in 50 kHz bandwidth
10 mVpp
at 1 MHz measured in 1MHz bandwidth
5 mVpp above 5 MHz measured in 1 MHz bandwidth.
1
In rush limit refers to the impedance of the modem when it is unpowered is very low. When power is supplied from an
unlimited supply the instantaneous current can exceed 4 Amps If the current exceeds this value damage can occur. This can be
limited in several ways, included using a supply that cannot provide more than 4 Amps instantaneously; or providing some
series inductance/resistance to the supply lead.