Garmin GMA 342 Installation Manual page 12

Aircraft Voltage
14V
28V
1.3.3 Power Requirements
The GMA 342/345 will operate down to emergency voltage (9 Volts). Below 11 Volts, the USB charge
port (GMA 345 only) and the speaker (both GMA 342 and GMA 345) are disabled.
Characteristic
Input Voltage Range
Leakage Current*
*Current the unit draws when turned off (GMA 342/345 turned off by the knob).
Characteristic
Idle Current*
Typical Operating Current
Maximum Current
*Unit current drawn with power applied, no audio, and minimum lighting.
Characteristic
Idle Current*
Typical Operating Current without USB charge
port being used.
Maximum Current with no USB charge port
connection
Maximum Current with USB charge port
connection
*Unit current drawn with power applied, no audio, and minimum lighting.
190-01878-02
Rev. 5
Table 1-4 Speaker Output
Speaker Impedance
Table 1-5 GMA 342/345 Power Requirements
Table 1-6 GMA 342 Power Requirements
Table 1-7 GMA 345 Power Requirements
4 Ω
8 Ω
4 Ω
8 Ω
Specification
11 to 33 Vdc
Current Draw
0.34 A @ 14 VDC
0.19 A @ 28 VDC
0.83 A @ 14 VDC
0.43 A @ 28 VDC
1.19 A @ 14 VDC
0.90 A @ 28 VDC
Current Draw
0.34 A @ 14 VDC
0.19 A @ 28 VDC
0.83 A @ 14 VDC
0.43 A @ 28 VDC
1.19 A @ 14 VDC
0.90 A @ 28 VDC
2.39 A @ 14 VDC
1.49 A @ 28 VDC
GMA 342/345 Installation Manual
Output Power
3 Watts
Not Recommended
10 Watts
7 Watts
< 1 mA
Power Consumption
4.76 W @ 14 VDC
5.32 W @ 28 VDC
11.62 W @ 14 VDC
12.04 W @ 28 VDC
16.66 W @ 14 VDC
25.20 W @ 28 VDC
Power Consumption
4.76 W @ 14 VDC
5.32 W @ 28 VDC
11.62 W @ 14 VDC
12.04 W @ 28 VDC
16.66 W @ 14 VDC
25.20 W @ 28 VDC
33.46 W @ 14 VDC
41.72 W @ 28 VDC
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