Datasheet

Tsb_vout Delay from +5VSB bein
g
in re
g
ulation to O/Ps bein
g
in regulation at AC turn on.
50 1000 mS
Figure 2: Turn On/Off Timing
AC Input AC off AC On
T
vout_holdup
Vout
T
ac_on-delay T pwok_low
Tsb_on-delay T pwok_off T pwok_off
PWOK T
pwok_on T pwok_holdup T sb_on-delay T pwok_on T pson_pwok
+5VSB T
sb_vout T sb_holdup
Min.>70mS
T pson_on_delay
PSON#
AC turn 0n/off cycle PSON turn on/off cycle
3.7 Efficiency
The minimum power supply system efficiency shall be 80% at typical load, measured at nominal input
voltage 115 V
4. 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 15 sec and a PSON
#
cycle HIGH for 1 sec must be able to restart the power supply.
4.1 Over Current Protection (OCP)
The power supply shall have current limit to prevent the +5V, +3.3V, and +12V outputs from exceeding the
values shown in Table-Over Current Protection. The power supply shall latch off if the current exceeds the
limit.
Table 10: Over Current Protection
Voltage Minimum Maximum Shutdown Mode
+5V 27A 38A Latch Off
+3.3V 27A 38A Latch Off
+12V 53A 72A Latch Off