User manual

Kontron Compact Computers AG SMX945 Detailed Manual V1.1
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7.6. Power Planes
Use a plane for all power signals. Place decoupling capacitors on each power plane as referred to in the
following table:
Power Plane for Power Input
to the SMX945
Voltage
(Volt)
Current
(Amp)
Voltage
Tolerance
Decoupling Capacitors
DCIN 12V
For generating the processor core voltage
12V
(5V-18V)
30Watt -
(internal reg)
10x 22uF/35V CER LowESR
5x 1uF/35V CERCAP
2x 2200uF/35V
VCC5ALW 5.0V 0.1A +/- 5% 5x 100nF
The VCC3, VCC3ALW and VCC5 are generated internally on the SMX945 module.
Attention!
The minimum input voltage is 4.9Volt under full load. Be careful that the power plane is able to
support 8Amp peaks with a voltage loss of not more than 100mV.
Power Output from the SMX945
Power Plane from the SMX945
to supply circuits on the motherboard
Voltage
(Volt)
Current
(Amp)
Voltage
Tolerance
Decoupling Capacitors
VCC3ALW 3.3V 0.05 +/-5% Only for test purposes
VCC3 3.3V 0.1 +/-5% Only for test purposes