Texas Instruments DS90UB953-Q1, Руководство пользователя

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6 Board Connections
6.1 Power Supply
Table 6-1. Power Supply
Reference Signal Description
J30.1 or J26.1 +12V
Main Power
12VDC (nominal) power connector that supplies power to
the entire board.
J28.1 (Optional) +1.1V
1.1V ±5%
Alternative to Main Power
J34.2 (Optional) +1.8V
1.8V ±5%
Alternative to Main Power
J35.2 (Optional) +3.3V
3.3V ±5%
Alternative to Main Power
6.2 Power Over Coax Interface
The DS90UB960-Q1EVM offers four Power-over-Coax interfaces (PoC) to connect cameras through a coaxial
cable with FAKRA connectors. Power is delivered on the same conductor that is used to transmit video and
control channel between the host and the camera. By default, 9V power supply is applied over the coax cable
from a 1A LDO (Max 250 mA per PoC interface). Refer to
Table 6-3 for other PoC configurations.
Each PoC interface uses a filter network as shown in Figure 6-1 . The PoC network frequency response
corresponds to the bandwidth compatible with DS90UB935-Q1 and DS90UB953-Q1 serializers.
V
PoC
L
1 C
1
FB
3
FB
2
FB
1
0.1 P F
C
2
>10 P F
R
2
RIN+
RIN-
C
AC1
C
AC2
33 nF
±
100 nF
15 nF
±
47 nF 49.9
:
4.02 k :
R
1
10 P H
Figure 6-1. Power-over-Coax Network Compatible with DS90UB935-Q1 and DS90UB953-Q1
WARNING
Verify that the power voltage is properly set before plugging into CN1. Power supply is not fused.
Over-voltage will cause damage to boards directly connected due to incorrect input power supplies.
www.ti.com Board Connections
SNLU226B – FEBRUARY 2018 – REVISED APRIL 2021
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DS90UB960-Q1EVM User's Guide 7
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