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RAIL 1-RAIL8
TP1-TP8
PS Input/UV Fault
JP21-JP28
PS Monitor
JP1-JP8
Ext, ENx and MONx
J4
PS Enable PU/PD
JP9-JP16
I C Address Selection
JP17-JP20
2
UCD9080
I C Communication
2
J3
5 V AC Adapter In
J1
5 V Lab Supply In
J5
1.3
Connectors
Hardware Overview
Figure 1. UCD9080EVM
The UCD9080EVM has connectors for power and I
2
C communications. J1 is the connector for the
external 5-V AC adapter. The J5 connector provides a laboratory power supply to power the EVM.
Connector J3 is for the I
2
C communication provided by the USB Interface Adapter included with this EVM
kit. The USB Interface Adapter includes a ribbon cable that can be connected to J3. The adapter is
connected to a Windows-based PC via USB protocol.
The J4 header allows users to be able to sequence and monitor their own external power supplies, rather
than the eight supplies provided on this board. Each of the eight power supply rails supported by the
UCD9080 has an enable and a monitoring pin. Connect the power supply that you want to monitor to the
appropriate enable and monitoring pins on this header. Then, move the corresponding jumpers (described
in the next section) so that the power supply rail is monitored using this header, instead of on the board.
CAUTION
Ensure that if you are configuring the UCD9080EVM to monitor an external
power supply, the voltage is appropriately scaled down to between 0 V – 2.5 V
(if using the internal reference) or between 0 V – 3.3 V (if using the external
reference).
SLVU184A – March 2007 – Revised February 2008
UCD9080 Power Supply Sequencer and Monitor Evaluation Module
3
