Intel
®
Server System P4000CP Power System Options Intel
®
Server Board S2600CP and Server System P4000CP TPS
Revision 1.1
Intel order number G26942-003
136
Figure 56. PSON# Required Signal Characteristic
13.2.7.2 PWOK (Power OK) Output Signal
PWOK is a power OK signal and will be pulled HIGH by the power supply to indicate that all the
outputs are within the regulation limits of the power supply. When any output voltage falls below
regulation limits or when AC power has been removed for a time sufficiently long so that power
supply operation is no longer guaranteed, PWOK will be de-asserted to a LOW state. Refer to
Figure 55 for a representation of the timing characteristics of PWOK.
The start of the PWOK
delay time shall inhibited as long as any power supply output is in current limit.
Table 86. PWOK Signal Characteristics
Signal Type
Open collector/drain output from power supply. Pull-up to VSB
located in system.
PWOK = High Power OK
PWOK = Low Power Not OK
MIN MAX
Logic level low voltage, Isink=4mA 0V 0.4V
Logic level high voltage, Isource=200A
2.4V 5.25V
Sink current, PWOK = low 4mA
Source current, PWOK = high 2mA
PWOK delay: Tpwok_on 100ms 500ms
PWOK rise and fall time
100
sec
Power down delay: T pwok_off 1ms
13.3 750-W Power Supply
This specification defines a 750W redundant power supply that supports server systems. This
power supply has 2 outputs; 12V and 12V standby. The AC input is auto ranging and power
factor corrected.
13.3.1 Mechanical Overview
The physical size of the power supply enclosure is 39/40mm x 74mm x 185mm. The power
supply contains a single 40mm fan. The power supply has a card edge output that interfaces
1.0 V
PS is
enable
d
2.0 V
PS is
disable
d
1.0
V
2.0
Enabled
Disabled
0.3V ≤ Hysterisis ≤ 1.0V
In 1.0-2.0V input voltages range is
required
5.25V
0V
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