Intel SC5299WS User Manual
Intel
®
Entry Server Chassis SC5299-E TPS
Power Sub-system
Revision 3.1
Intel order number D37594-005
21
Item
Description
Minimum
Maximum
Units
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.
asserted at turn on.
100 1000
msec
T
pwok_off
Delay from PWOK de-asserted to output voltages (3.3V, 5V,
12V, -12V) dropping out of regulation limits.
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.
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.
regulation at AC turn on.
50 1000
msec
T
5VSB_holdup
Time the 5VSB output voltage stays within regulation after
loss of AC.
loss of AC.
70
msec
2.1.5.11
Residual Voltage Immunity in Standby Mode
The power supply is immune to any residual voltage placed on its outputs (typically a leakage
voltage through the system from standby output) up to 500mV. There is neither additional heat
generated, nor stress of any internal components with this voltage applied to any individual
output, and all outputs simultaneously. It also does not trip the protection circuits during turn on.
voltage through the system from standby output) up to 500mV. There is neither additional heat
generated, nor stress of any internal components with this voltage applied to any individual
output, and all outputs simultaneously. It also does not trip the protection circuits during turn on.
The residual voltage at the power supply outputs for no load condition does not exceed 100mV
when AC voltage is applied.
when AC voltage is applied.
2.1.6
Protection Circuits
Protection circuits inside the power supply 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 15 sec and a PSON# cycle HIGH for 1sec will reset the power supply.
shutdown. If the power supply latches off due to a protection circuit tripping, an AC cycle OFF
for 15 sec and a PSON# cycle HIGH for 1sec will reset the power supply.
2.1.6.1
Over-Current Protection (OCP)
The power supply has a current limit to prevent the +3.3V, +5V, and +12V outputs from
exceeding 240VA. If the current limits are exceeded, the power supply will shut down and latch
off. The latch will be cleared by toggling the PSON
exceeding 240VA. If the current limits are exceeded, the power supply will shut down and latch
off. The latch will be cleared by toggling the PSON
#
signal or by an AC power interruption. The
power supply will not be damaged from repeated power cycling in this condition. -12V and 5VSB
are protected under over current or shorted conditions so that no damage can occur to the
power supply. An auto-recovery feature exists on the 5VSB rail.
are protected under over current or shorted conditions so that no damage can occur to the
power supply. An auto-recovery feature exists on the 5VSB rail.
2.1.6.2
Over Voltage Protection (OVP)
The power supply over voltage protection is locally sensed. The power supply will shut down
and latch off after an over voltage condition occurs. This latch can be cleared by toggling the
PSON
and latch off after an over voltage condition occurs. This latch can be cleared by toggling the
PSON
#
signal or by an AC power interruption. The following table contains the over voltage