Kontron ETXexpress UGM, User Manual

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9 Single Supply (without ATX)
Kontron User's Guide ETXexpress UGM
Evaluation Board
44
9 Single Supply (without ATX)
The ETXexpress UGM Baseboard is able to be supplied by just one voltage. This voltage has to be in the
range of 8.5V to 18V. This supply has to be connected at the 4pin ATX_12V power connector J59.
To use this feature it is as well necessary to have a module supporting the wide range input as some
small changes of the assembly (see
Appendix C ).
Are these constraints fulfilled, the onboard regulators begin to do the supply instead of the ATX power
supply. But some restrictions have to be cared about in this single supply mode.
Restrictions in single supply mode:
®
The onboard power regulators for 3.3V and 5V are limited to 6A each. After supplying
the onboard devices, there are
4.8A at 3.3V and 5.9A at 5V
remaining. Therefore the
total current of the used external devices (PCI, PCIexpress, USB, LVDS panel, IDE/CF,
RS232/LPT) must not exceed these limits in single supply mode.
®
No PCI Card can be used, which needs -12V supply.
®
If a wide range power supply is used, the PCI and PCIexpress slots are not supplied
with 12V.
®
The JILI30 and LVDS 12V power is not present and therefore a display has to be
supplied separately
®
UGM Fan and FAN2 are not supplied
Assembly Instructions to noATX supply
®
Remove R769 (top) and mount R752 (100kOhm; bottom), R61 (210kOhm; bottom)
to ensure, that the CPLD is supplied correctly.
®
Remove
R774
(bottom) and mount it on
R773
(top), to switch the CPLD into the
single supply mode.
®
Remove J58 (top), to ensure, that there is no short with the onboard generated
voltages possible.
®
Mount
R46
(0R; top) and
R60
(210kOhm; bottom) to enable 5V Standby.
In the single supply mode there is a power save mode possible:
If
R490
is removed and mounted on
R491
(both on topside), the system will shut down after a short
time (about 8 seconds) in S5 completely. This means that nearly no power is used from the power supply,
because no device will supplied. But in this case it is only possible to wake up the system by pressing the
power button for at least one second.