manual

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
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 110% 150% Latch Off
+3.3V 110% 150% Latch Off
+12V 110% 150% Latch Off