Protection Circuits; Figure 20. Turn On/Off Timing (Power Supply Signals); Table 125. Over-Current Protection (Ocp)/240Va - Intel SC5299BRP Technical Product Specification

®
Intel Entry Server Chassis SC5299-E TPS
AC Input
Vout
T
AC_on_delay
T
sb_on_delay
PWOK
5VSB
T
sb_vout
PSON
AC turn on/off cycle
2.5.9

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 1 sec will reset the power supply.
2.5.9.1 Over-current Protection (OCP)
The power supply has a current limit to prevent the +3.3V, +5V, and +12V outputs from
exceeding the values shown in the following table. If the current limits are exceeded the power
supply will shut down and latch off. The latch will be cleared by toggling the PSON
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. The 5VSB will auto recover after removing the OCP
limit.
Voltage
+3.3V 110% = 26.4A
+5V 110% = 33A
Revision 3.1
T
T
pwok_on
T
pwok_holdup
T
_
5VSB holdup

Figure 20. Turn On/Off Timing (Power Supply Signals)

Table 125. Over-current Protection (OCP)/240VA

Over-current Limit
MIN
150% = 36A
150% = 45A
Intel order number D37594-005
vout_holdup
T
pwok_low
T
pwok_off T
sb_on_delay
MAX
Power Sub-system
T
pwok_on
T
pson_on_delay
PSON turn on/off cycle
#
signal or by
Peak Load*
Peak Limit Delay
T
pwok_off
T
pson_pwok
101