Intel manual Estimateded Server Board Mtbf, Estimated SDS2 Server Board Mtbf Turn On/Off Timing

Intel® Server Board SDS2 Electrical and Thermal Specifications

Electrical and Thermal Specifications Intel® Server Board SDS2

10.4 Estimateded Server Board MTBF

The estimated Mean-Time Between Failures (MTBF) is calculated at 103,996 hours at a maximum operating temperatur

Figure 13. Output Voltage Timing

The table below shows the calculated numbers.

Table 87. Estimated SDS2 Server Board MTBF

Table 85: Turn On/Off Timing

	Item
Sub-assembly Description	Quantity
	Tsb_on_delay
	T ac_on_delay
	Tvout_holdupassembly
	-
	Tpwok_hold p
	Sub

0)-	MTBF	I		Duty (%)		usedin
		Description
		Quote
Delay from AC being applied to 5VSB being within regulation.
(Drives							(%)
DelayTemperature from AC being(Hours) applied to all output voltages beingas								within	assemblySub- TemperatureSystemin I
regulation.				Quote			System
Time allValid?	output voltages-assemblyQuote
		stay-assemblywithin regulation-assembly			after lossCycle		of AC.
Delay from loss ofSubAC to de-assertionSubTemperature			of PWOKSubCycle			Duty
Assembly Accel

assemblyMTBF	Quote(Hours)
Min
20Sub	from
21
-

Max

2000

2500

Assembly Quote to

TemperatureUnits msec Fact msec Acc Internalmsec msec

Sub-assembly Duty Cycle Acc Fact

Total Sub-assembly

Tpson_on_delay

Baseboard 1

T pson_pwok

Tpwok_on

T pwok_off

Tpwok_low

Tsb_vout

Delay from PSON# active to output voltages within regulation limits.
1	83,188#	55	100	100	50
Delay from PSON deactive to PWOK being de-asserted.

Delay from output voltages within regulation limits to PWOK asserted at turn on.

Delay from PWOK de-asserted to output voltages (3.3V, 5V, 12V, -12V) dropping out of regulation limits.

Duration of PWOK being in the de-asserted state during an off/on cycle using AC or the PSON signal.

Delay from 5VSB being in regulation to O/Ps being in regulation at AC turn on.

5	400	msec
83,188 50 1.250msec 1.00			103,
100	500	msecTotal Failure Rate (
			MTBF (h
1		msec
100		msec
50	1000	msec

Revision 1.2	97
Order Number:	A85874-002
100	Revision 1.2

Order Number: A85874-002