Board Features
EBX-38 Hardware Reference Manual
17
P
OWER
D
ELIVERY
C
ONSIDERATIONS
Using the VersaLogic approved 12V power supply (VL-PS-ATX12-300A) and power cable (VL-
CBR-1203) or the 5V power supply (VL-PS200-ATX) and power cable (VL-CBR-2022) ensures
high quality power delivery to the board. Customers who design their own power delivery
methods should take into consideration the guidelines below to ensure good power connections.
In addition, the specifications for typical operating current do not include any off-board power
usage that may be fed through the main power connector. Expansion boards and USB devices
plugged into the board will source additional power through the main power connector.
Do not use wire smaller than 22 AWG. Use high quality UL 1007 compliant stranded
wire.
The length of the wire should not exceed 18 inches.
Avoid using any additional connectors in the power delivery system.
The power and ground leads should be twisted together, or as close together as possible
to reduce lead inductance.
A separate conductor must be used for each of the power pins.
All power input pins and all ground pins must be independently connected between the
power source and the power connector.
Use a high quality power supply that can supply a stable voltage while reacting to widely
varying current draws.
Refer to Table 24: PC/104-Plus Connectors Maximum Current on page 48 for information on the
current ratings for the PC/104-
Plus
connectors.
