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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
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
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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.
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If a wide range power supply is used, the PCI and PCIexpress slots are not supplied
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with 12V.
The JILI30 and LVDS 12V power is not present and therefore a display has to be
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supplied separately
UGM Fan and FAN2 are not supplied
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Assembly Instructions to noATX supply
Remove
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to ensure, that the CPLD is supplied correctly.
Remove
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single supply mode.
Remove
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voltages possible.
Mount
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In the single supply mode there is a power save mode possible:
R490
If
is removed and mounted on
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.
Kontron User's Guide ETXexpress UGM
Evaluation Board
Appendix
C).
R769
(top) and mount
R774
(bottom) and mount it on
J58
(top), to ensure, that there is no short with the onboard generated
R46
R60
(0R; top) and
(210kOhm; bottom) to enable 5V Standby.
R491
(both on topside), the system will shut down after a short
R752
(100kOhm; bottom),
R773
(top), to switch the CPLD into the
44
9 Single Supply (without ATX)
R61
(210kOhm; bottom)
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