Kontron KTQ77-FLEX Manuel d'utilisateur télécharger pdf (Page 36)

KTQ77/Flex Users Guide

KTD-N0848-C Page 36

6 Internal Connectors

6.1 Power Connector (ATX/BTXPWR)

The KTQ77 boards are designed to be supplied from a standard ATX (or BTX) power supply. Use of

BTX supply is not required for operation, but may be required to drive high-power PCIe cards.

ATX/ BTX Power Connector (J45):

Note

Type

Signal

Type

Note

PWR

3V3

GND

PWR

+12V

PWR

+12V

PWR

SB5V

PWR

P_OK

-5V

PWR

GND

PWR

GND

PWR

GND

PWR

PSON#

PWR

GND

PWR

3V3

-12V

PWR

3V3

PWR

Note 1: -5V supply is not used on-board.

See chapter “Power Consumption” regarding input tolerances on 3.3V, 5V, SB5V, +12 and -12V (also

refer to ATX specification version 2.2).

ATX+12V-4pin Power Connector (J46):

Note

Type

Signal

Type

Note

PWR

GND

+12V

PWR

GND

+12V

PWR

Note 1: Use of the 4-pin ATX+12V Power Connector is required for operation of all KTQ77 board

versions.

Signal Description

P_OK

P_OK is a power good signal and should be asserted high by the power supply to indicate

that the +5VDC and +3.3VDC outputs are above the undervoltage thresholds of the power

supply. When this signal is asserted high, there should be sufficient energy stored by the

converter to guarantee continuous power operation within specification. Conversely, when

the output voltages fall below the undervoltage threshold, or when mains power has been

removed for a time sufficiently long so that power supply operation is no longer guaranteed,

P_OK should be de-asserted to a low state. The recommended electrical and timing

characteristics of the P_OK (PWR_OK) signal are provided in the ATX12V Power

SupplyDesign Guide.

It is strongly recommended to use an ATX or BTX supply in order to implement the

supervision of the 5V and 3V3 supplies. These supplies are not supervised on-board.

PS_ON# Active low open drain signal from the board to the power supply to turn on the power supply

outputs. Signal must be pulled high by the power supply.

Internal Connectors

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Kontron KTQ77-FLEX Manuel d'utilisateur Page 36

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