Iridium 9603 Developer's Manual page 21

Iridium 9603 SBD Transceiver Product Developers Guide
Revision 3.1
Table 9: DC Power Input Specifications
Supply Input Voltage Range
Supply Input Voltage Ripple
Typical Power Consumption at +5.0 VDC
Idle Current (average*)
Idle Current (peak)
Transmit Current (peak)
Transmit Current (average*)
Receive Current (peak)
Receive Current (average*)
SBD message transfer - average current*
SBD message transfer - average power*
* Note: The average power consumption will vary depending on the view of the satellite constellation from the antenna.
** Note: Includes Tx Burst droop. This is the supply voltage range of the 9603; the 9603N has an extended supply voltage range of
+5 V +/- 0.5 V
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

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
5 mVpp
10 mVpp
5 mVpp above 5 MHz measured in 1 MHz bandwidth.
1
On the 9603N the supply droop should not be more than 0.5 volts.
2
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.
Proprietary & Confidential Information
Distribution of guide restricted to product developers only • Information contained in this guide is subject to change without notice.
Parameter
2
current to 4 Amps maximum
from 0 to 50 kHz
at 1 MHz measured in 50 kHz bandwidth
at 1 MHz measured in 1MHz bandwidth
9603 Value 9603N Value
5.0V DC +/- 5.0V DC +/-
0.2V** 0.2V**
< 40 mV pp < 40 mV pp
9603 Value 9603N Value
45mA 34mA
195mA 156mA
1.5 A 1.3 A
190mA 145mA
195mA 156mA
45mA 39mA
190 mA 158mA
<= 1.0 W <= 0.8 W
1
.
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