Texas Instruments DS90UB934-Q1, Руководство пользователя, Страница: 5 / 37

FB
4.7
P
H
1 .Ÿ
FAKRA
connector
FPD3 signal
VFEED_POC
100
P
H
1 .Ÿ
0.1
P
F
www.ti.com
Demo Board Connections
5 SNLU220 – December 2016
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Using the DS90UB934-Q1EVM Evaluation Module
3 Demo Board Connections
3.1 Power Supply
Table 1. Power Supply
REFERENCE SIGNAL DESCRIPTION
J24.1 12 V
Main Power
Single 12-V DC (nominal) power connector that supplies power to the
entire board.
J11.1 (Optional) 5 V
5 V ±5%
Alternative to main power
J28.2 (Optional) 1.8 V
1.8 V ±5%
Alternative to main power
J29.2 (Optional) 3.3 V
3.3 V ±5%
Alternative to main power
3.2 Power-Over-Coax Interface
The DS90UB934-Q1EVM offers two power-over-coax (POC) interfaces 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, 9-V power supply is applied over
the coax cable. Refer
Table 2 to for other POC configurations.
For POC on the EVM, the circuit uses a filter network as shown in Figure 3 . The POC network frequency
response corresponds to the bandwidth compatible with DS90UB913A / DS90UB933 chipsets.
Figure 3. Power-Over-Coax Network
WARNING
Verify that the power voltage is properly set before plugging into
CN1 or CN2. Power supply is not fused. Overvoltage causes
damage to boards directly connected due to incorrect input power
supplies.