Electrical
44 613768
Total Test time for each Power Excursion testing time is expected to last until thermal
saturation occurs in the PSU.
More details about test time for each row above and formulas to calculate T
C
and T
E
power values for different PSU sizes will be detailed in the “Desktop Platform Form
Factor Power Supply Test Plan – (Doc #
338448)
4.4 Reset After Shutdown
If the power supply latches into a shutdown state because of a fault condition on its
outputs, the power supply returns to normal operation only after the fault has been
removed and the PS_ON# has been cycled OFF/ON with a minimum OFF time of one
second.
4.4.1 +12VSB at Power-Down (Required)
After AC power is removed, the +12VSB standby voltage output shall remain at its
steady state value for the minimum hold-up time specified in Section 4.2.9
until the
output begins to decrease in voltage. The decrease shall be monotonic in nature,
dropping to 0.0 V. There shall be no other disturbances of this voltage at or following
removal of AC power.
4.4.2 +12VSB Fall Time (Recommended)
Power supply 12VSB is recommended to go down to low level within 2 seconds under
any load condition after AC power is removed as shown in the below figure. Intel test
plan will test at Light 20% Load. If system requires specific +12VSB fall time, the PSU
design is recommended to support it.
Figure 4-8: 12VSB Fall Time
To Next Page
Loading...
Need help?
General
