Power Consumption - Kontron KTH81/mITX User Manual

KTD-N0882-I

Power Consumption

3.6
In order to ensure safe operation of the board, the ATX12V power supply must monitor the supply voltage
and shut down if the supplies are out of range – refer to the hardware manual for the actual power supply
specification. Please note, In order to keep the power consumption to a minimal level, boards do not
implement a guaranteed minimum load. In some cases, this can lead to compatibility problems with ATX
power supplies, which require a minimum load to stay in regulation. The KTQ87/mITX / KTH81/mITX board
must powered through the ATX4P (4-pole) and the ATX24P (24-pole) connector using standard ATX power
supply.
ATX12V supply: Both ATX4P connector and ATX24P connector must be used in according to the ATX12V PSU
standard.
Warning: Hot Plugging power supply is not supported. Hot plugging might damage the board.
The requirements to the supply voltages are as follows:
Supply
VCC3.3 3.135V
Vcc
+12V
–12V –13.2V
-5V
5VSB
On the following pages you will find "total system power examples" for mITX and Flex boards in different
configurations:
mITX, Total System power example:
mITX, Low Power Configuration
mITX, High Power Configuration
Flex, Total System power example:
Flex, Low Power Configuration
Flex, Medium Power Configuration
Flex, High Power Configuration
Page 22
Min Max Note
3.465V Should be ±5% for compliance with the ATX specification
4.75V 5.25V Should be ±5% for compliance with the ATX specification.
Should be +5/ -0% to meet the USB standard.
11.4V 12.6V Should be ±5% for compliance with the ATX specification
–10.8V Should be ±10% for compliance with the ATX specification
-5,50V -4.5V Not required for the KTQ87 boards
4.75V 5.25V Should be ±5% for compliance with the ATX specification
KTQ87/KTH81 Users Guide
System Specification