05
3.3 Regulation
3.4 Rise Time
3.3.1 ST50F-ES
The cross regulation defined as follows, the output regulation should be within
the specified range.
DC output rise time is less than 20 mS at nominal line and full load.
3.5 Hold-up Time
DC +5V output maintains at least 8mS after power off which hold within para
3.1 under 230V/50Hz 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.
Load
Light Load
Typical Load
Full Load
+5Vsb
0.47A
1.17A
2.33A
-12V
0.06A
0.14A
0.28A
+5V
2.50A
6.25A
12.49A
+3.3V
3.00A
7.49A
14.99A
+12V
6.22A
15.54A
31.08A
3.3.2 ST40F-ES
Load
Light Load
Typical Load
Full Load
+5Vsb
0.46A
1.15A
2.29A
-12V
0.06A
0.14A
0.28A
+5V
2.46A
6.14A
12.28A
+3.3V
2.95A
7.37A
14.74A
+12V
4.59A
11.47A
22.93A
06
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.
Output
+5V
+12V
+3.3V
-12V
+5VS
Capacitive load (uF)
10,000
10,000
10,000
330
10,000
3.9 Capacitive Load
4.1 Input Protection
4. PROTECTION
The power supply should be able to power up and operate normally with the following
capacitances simultaneously present on the DC outputs.
In primary circuit of the power supply , a protected fuse is inserted.
Only internal fault of the power supply will cause the fuse blown.
Any overload or short circuit at DC output will keep from fuse brown or fire hazard.
The +5V/+3.3V DC output are protected against the under voltage condition.
Range value can't be exceed 3.3~3.7V at 5V terminal and 2.0~2.4V at 3.3V.
4.2 Output Protection
4.2.1 Under voltage protection
The +5V/+12V/+3.3V DC output are protected against the over voltage condition.
Maximum value can't be over 6.5V at 5V terminal and 15.5V at 12V, 4.3V at 3.3V.
4.2.2 Over Voltage Protection
Strider Essential Series
