SilverStone ST45NF [6/15] Nj450 manual 5
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SilverStone ST45NF [6/15] Nj450 manual 5

SilverStone ST45NF [6/15] Nj450 manual 5
3.3. Dynamic Loading
The output voltages shall remain within the limits specified in Table 7 for the step loading
and within the limits specified in Table 8 for the capacitive loading. The load transient
repetition rate shall be tested between 50Hz and 5kHz at duty cycle ranging from 10%-90%.
The load transient repetition rate is only a test specification. The Δstep load may occur
anywhere within the MIN load to the MAX load shown in Table 5 and Table 6.
Output Step Load Size Load Slew Rate Capacitive Load
+5V
+3.3V
+12V
+5VSB
30% of Max. Load
30% of Max. Load
50% of Max. Load
50% of Max. Load
0.5 A/uS
0.5 A/uS
0.5 A/uS
0.5 A/uS
1000 uF
1000 uF
2200 uF
1 uF
Table 8 - Transient Load requirements
Table 9 - Capacitive Loading Conditions
Table 10 - Output Voltage Timing
3.4. Capacitive Loading
The power supply shall be stable and meet all requirements, except dynamic loading
requirements, with the following capacitive loading ranges.
Output MIN MAX Units
+5V
+3.3V
+12V
-12V
+5VSB
10
10
10
1
1
12,000
12,000
11,000
350
350
uF
uF
uF
uF
uF
3.5. Timing Requirements
These are the timing requirements for the power assembly operation. The output voltages
must rise from 10% to within regulation limits (Tvout_rise) within 5 to 200mS. The +5V,
+3.3V and +12V output voltages should start to rise at about the same time. All outputs
must rise monotonically. The +5V output needs to be greater than the +3.3V output during
any point of the voltage rise. The +5V output must never be greater than the +3.3V output
by more than 2.25V. Each output voltage shall reach regulation within 50 mS (Tvout_on)
of each other during turn on of the power supply. Each output voltage shall fall out of
regulation within 400 mS (Tvout_off) of each other during turn off. Figure 1 and figure
2 show the turn On and turn Off timing requirement. In Figure 2, the timing is shown with
both AC and PSON# controlling the On/Off of the power supply.
Item
Description
Tvout_rise
Tvout_rise
Tvout_rise
Output voltage rise time from each main output
All main output must be within regulation of
each other within this time.
All main output must leave regulation within this time
MIN MAX Units
0.1
--
--
20
50
400
mS
mS
mS

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