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Intel® Server Board SDS2 Electrical and Thermal Specifications
Revision 1.2
Order Number: A85874-002
97
Figure 13. Output Voltage Timing
Table 85: Turn On/Off Timing
Item Description Min Max Units
T
sb_on_delay
Delay from AC being applied to 5VSB being within regulation. 2000 msec
T
ac_on_delay
Delay from AC being applied to all output voltages being within
regulation.
2500
msec
T
vout_holdup
Time all output voltages stay within regulation after loss of AC. 21 msec
T
pwok_holdup
Delay from loss of AC to de-assertion of PWOK 20 msec
T
pson_on_delay
Delay from PSON
#
active to output voltages within regulation limits. 5 400 msec
T
pson_pwok
Delay from PSON
#
deactive to PWOK being de-asserted. 50 msec
T
pwok_on
Delay from output voltages within regulation limits to PWOK asserted at
turn on.
100 500
msec
T
pwok_off
Delay from PWOK de-asserted to output voltages (3.3V, 5V, 12V, -12V)
dropping out of regulation limits.
1
msec
T
pwok_low
Duration of PWOK being in the de-asserted state during an off/on cycle
using AC or the PSON signal.
100
msec
T
sb_vout
Delay from 5VSB being in regulation to O/Ps being in regulation at AC
turn on.
50 1000
msec
Electrical and Thermal Specifications Intel® Server Board SDS2
Revision 1.2
Order Number: A85874-002
100
10.4 Estimateded Server Board MTBF
The estimated Mean-Time Between Failures (MTBF) is calculated at 103,996 hours at a maximum operating temperature of 35 C.
The table below shows the calculated numbers.
Table 87. Estimated SDS2 Server Board MTBF
Sub-assembly
Description
Sub-assembly Quantity
Assembly Temperature
Accel Valid? (Drives-0)
Sub-assembly MTBF
Quote (Hours)
Sub-assembly
Temperature Quote I
Sub-assembly Duty
Cycle Quote (%)
Duty Cycle as used in
System (%)
Sub-assembly
Temperature in System
I
Sub-assembly MTBF
from Quote (Hours)
Assembly Quote to
Internal Temperature
Acc Fact
Sub-assembly Duty
Cycle Acc Fact
Total Sub-assembly
MTBF (Hours)
Total Sub-assembly
Failure Rate (FITs)
Baseboard 1 1 83,188 55 100 100 50 83,188 1.250 1.00 103,996 9,616
Total Failure Rate (FITs) 9,616
MTBF (hours) 103,996