Avidyne IFD540 - Low Power Operations Impact

IFD500 Series Pilot Guide
7-40 General
LOW POWER OPERATIONS
The following actions are taken as input power is reduced to the
IFD:
Input Voltage
IFD Operation Impact
19.9VDC
16W VHF radio output power reduces to
10W.†
18VDC
Lose high power (2.1A) USB charging. USB
charging reduces to 1A.
12.75VDC
Lose all USB charging.
11.5VDC
Bezel lighting and display lighting maximum
values are reduced.
10.9VDC
VHF radio output power reduces to 6W.†
10.0VDC
VHF radio output power reduces to 4W. †
9VDC
60-second countdown to IFD shutdown
begins (countdown message displayed on
the IFD).
6VDC – 8 VDC
Internal components power down.
Function is restored by rising above those voltage thresholds by
1VDC for more than 1 second. A rapid decay below 10 VDC to 6-
8 VDC will result in a power down prior to the 60-sec countdown
being displayed or completed.
NOTE
16W VHF Transmission Power Requires 28VDC
16W radio transmission power is only available as
an option in 28VDC aircraft. †