manual

04
3.5 Hold-up Time
DC +5V output maintains at least 16mS ,after power off , under 230V/50Hz 75%Load condition.
3.6 5VSB
5VSB is requierd for the implementation of PS-ON described above. 5VSB is a standby voltage that
may be used to power circuits that require power input during the powered-down state of all power rails.
The 5 VSB pin should deliver 5V ± 5% at a minimum of 2.5 A for PC board circuits to operate.
Conversely, PC board should draw no more than 2.5A maximum form this pin. This power may be used
to operate circuits such as soft power control.
3.7 PG-OK
PG-OK is a power good signal and should be asserted high by power supply to indicate that the +5 VDC
and +3.3 VDC outputs are above the under-voltage thresholds of the power supply. When this signal is
asserted high, there should be sufficient mains energy stored by the converter to guarantee continuous
power operation within specification. Conversely, when either the +5VDC or the +3.3VDC output voltage
falls below the under-voltage threshold, or when mains power has been removed for a time sufficiently
long so that power supply operation is no longer guaranteed, PG-OK should be deasserted to a low
state. See Figure 1 for a representation of the timing characteristics of the PG-OK,PS-ON, and germane
power rail signals.
3.8 3.3V Sense
A default 3.3V sense line should be implemented pin 13 of the connector.
3.9 Capacitive Load
The power supply should be able to power up and operate normally with the following capacitances
simultaneously present on the DC outputs.
Output
+5V
+12V
+3.3V
-12V
+5VS
Capacitive load (uF)
6000
8000
6000
350
350