Technical Product Specification

Power Sub-system Intel® Workstation System SC5650SCWS TPS
Revision 1.2
Intel order number: E81822-002
66
An AC line dropout is defined to be when the AC input drops to 0VAC at any phase of the AC
line for any length of time. During an AC dropout, the power supply meets dynamic voltage
regulation requirements. An AC line dropout of any duration does not cause any tripping of
control signals or protection circuits. If the AC dropout lasts longer than the hold-up time, the
power recovers and meets all turn-on requirements. The power supply meets the AC dropout
requirement over rated AC voltages and frequencies. A dropout of the AC line for any duration
does not cause damage to the power supply.
4.1.5.5.1 AC Line 5VSB Holdup
The 5VSB output voltage stays in regulation under its full load (static or dynamic) during an AC
dropout of 70ms min (=5VSB holdup time) whether the power supply is in the ON or OFF state
(PSON asserted or de-asserted).
4.1.5.6 Power Recovery
The power supply recovers automatically after an AC power failure. AC power failure is defined
to be any loss of AC power that exceeds the dropout criteria.
4.1.5.6.1 Voltage Brownout
The power supply complies with the limits defined in EN55024: 1998 using the IEC 61000-4-
11:1995 test standard and performance criteria C defined in Annex B of CISPR 24.
In addition, the power supply meets the following Intel Requirement:
o A continuous input voltage below the nominal input range shall not damage the
power supply or cause overstress to any power supply component. The power
supply must be able to return to normal power up state after a brownout condition.
Maximum input current under a continuous brownout shall not blow the fuse. The
power supply should tolerate a 3min ramp from 90VAC voltage to 0VAC after the
components have reached a steady state condition.
4.1.5.6.2 Voltage Interruptions
The power supply complies with the limits defined in EN55024: 1998 using the IEC 61000-4-
11:1995 test standard and performance criteria C defined in Annex B of CISPR 24.
4.1.5.7 AC In-rush
AC line in-rush current does not exceed 50A peak, cold start at 20 degrees C, and no
component is damaged at hot start for up to one-quarter of the AC cycle, after which, the input
current is no more than the specified maximum input current listed in Table 19. The peak in-rush
current is less than the ratings of its critical components (including input fuse, bulk rectifiers, and
surge limiting device).
The power supply meets the in-rush requirements for any rated AC voltage during turn on at any
phase of AC voltage or during a single cycle AC dropout condition, as well as upon recovery
after AC dropout of any duration, and over the specified temperature range (T
op
).