Doc. No: Unex-QSG-21-001
11/27
A printed version of this document is an uncontrolled copy
© 2021 Unex Technology Corporation – Company Confidential
7.3.
Power Consumption
OBU-301(v2)/OBU-351 can be powered from a DC power source (e.g., automotive
ACC) or from a mini-USB Vbus power source. OBU-301(v2)/OBU-351 will automatically
switch to the power source with the highest input voltage. Changing power source can be
done any time before and during operation, however a reset may be triggered during switch.
Table 3: Power consumption
Condition
Power Consumption
Temp.
Power Source
Voltage (V)
Low
*1
Typical
*2
High
*3
25°C
USB0 Vbus
5
0.52A
(2.60W)
0.53A
(2.65W)
0.94A
(4.70W)
POWER (J8.1)
12
0.24A
(2.88W)
0.25A
(3.00W)
0.45A
(5.40W)
85°C
USB0 Vbus
5
0.65A
(3.25W)
0.66A
(3.30W)
1.03A
(5.15W)
POWER (J8.1)
12
0.30A
(3.60W)
0.30A
(3.60W)
0.50A
(6.00W)
Note:
*1: RX only
*2: TX @ 1% duty cycle (CH172, 20dBm, 6Mbps, 750B, 10Hz)
*3:
TX @ 100% duty cycle (CH172, 20dBm)
8.
I/O Interfaces
8.1.
OBU-301(v2)/OBU-351
8.1.1.
External Interfaces
8.1.1.1.
LED
Figure 5: LED
7 6 5 4 3 2 1
