RoadMAPS Overview
RoadMAPS User’s Manual
2-17
When components require more than 12 volts, additional voltage
will be generated using DC/DC converters; when components
require less than 12 volts, linear regulators will be used.
The power supply system has fuses and switches to control, pro-
tect, and limit its operation. In particular, the following sections
will have a shut-off pin:
•
Transmitter Power Amplifier
•
RF transmitter control board
•
All RF receiver supply sections
Table 2.1 Operating Voltage and Current
Component
Operating Voltage
Operating Current
PPC
12V
1.5A
CPU
5V
2A
DMR—without ADC
with ADC
3.3V
5V
2.5A
250 mA
RF Front End
12V
300mA
TX control board/modulator
5V
230mA
Transmitter driver
12V
140mA
Transmitter Power Amplifier
28V
4A
Fans (x2)
12V
400mA
To prevent excessive use of the battery, the RoadMAPS unit will not operated if the
vehicle’s engine to which it is connected is not running.
Содержание RoadMAPS
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