Spire Jewel 400W SP-ATX-400W-PFC Manuale Utente

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SP-ATX-400W-PFC
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Spire Corp.
Http://www.spirepower.com  &  Http://www.spirecoolers.com 
Http://www.spire-corp.com 
 
 
 
 
2.2.7 Output Transient Response 
The table below summarizes the output transient steps for each output. The   
Transient slew rate is =0.5A/
μ
s. 
Table 6.    DC Output Transient Response Specifications 
DC Output 
Maximum Step Size 
Output Voltage Tolerance
+12VDC 
50% of rated output 
±5% 
+5VDC 
50% of rated output 
±5% 
+3.3VDC 
30% of rated output 
±5% 
-12VDC 0.1A 
±10% 
+5VSB 0.1A 
±5% 
 
2.2.8 Capacitive Load 
The power supply is able to power up and operate normally with the following 
capacitances simultaneously present on the DC outputs. 
Table 7.    Output Capacitive Loads   
 
 
2.2.9 Closed-loop Stability 
The power supply is unconditionally stable under all line/load/transient loads 
Conditions including capacitive loads specified in Table 7. A minimum of 45 
degrees phase margin and 10 dB gain margin is recommended at both the 
maximum and minimum loads. 
 
2.2.10 Power Sequencing 
All outputs, regardless of loading, turn on within 50ms of each other. The 5VSB 
output is in regulation for a minimum of 10ms prior to the other output rails 
reaching regulation. 
 
 
 
 
 
DC Output 
ATX12V Capacitive Load (μF)
+12 VDC 
20,000 
+5 VDC 
12,000 
+3.3 VDC 
12,000 
-12 VDC 
330 
+5 VSB 
12,000