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Intel® Server Chassis SC1400UP / Intel® Server Platform SR1425BK1-E
AC Input
Vout
T
AC_on_delay
T
sb_on_delay
PWOK
5VSB
T
sb_vout
PSON
AC turn on/off cycle
Figure 37. Turn On/Off Timing (Power Supply Signals)
6.31 Residual Voltage Immunity in Standby mode
The PS supply should be immune to any residual voltage placed on its outputs (Typically a
leakage voltage through the system from standby output) up to 500mV. There shall be no
additional heat generated, nor stress of any internal components with this voltage applied to any
individual output, and all outputs simultaneously. It also should not trip the protection circuits
during turn on.
The residual voltage at the power supply outputs for no load condition shall not exceed 100mV
when AC voltage is applied.
6.32 Protection Circuits
Protection circuits inside the power supply shall cause only the power supply's main outputs to
shutdown. If the power supply latches off due to a protection circuit tripping, an AC cycle OFF
for 15sec and a PSON
6.33 Current Limit (OCP)
The power supply shall have current limit to prevent the +3.3V, +5V, and +12V outputs from
exceeding the values shown in Table 13. If the current limits are exceeded the power supply
shall shutdown and latch off. The latch will be cleared by toggling the PSON
AC power interruption. The power supply shall not be damaged from repeated power cycling in
this condition. -12V and 5VSB shall be protected under over current or shorted conditions so
that no damage can occur to the power supply. Auto-recovery feature is a requirement on 5VSB
rail.
Revision 1.0
T
vout_holdup
T
pwok_on
T
pwok_holdup
T
5VSB
_
holdup
#
cycle HIGH for 1sec shall be able to reset the power supply.
T
pwok_low
T
pwok_off
T
sb_on_delay
PSON turn on/off cycle
T
T
pwok_on
pwok_off
T
pson_pwok
T
pson_on_delay
#
signal or by an
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