Electrical
42
336521
4.4.2
+5VSB Fall Time - RECOMMENDATION
Power supply 5VSB is recommended to go down to low level within 2 seconds under
any load condition after AC power is removed as shown in
. Intel
®
test plan
will test at Light 20% Load. If system requires sp5VSB fall time, the PSU
design is recommended to support it.
Figure 4-7: 5VSB Fall Time
4.5
Output Protection
4.5.1
Over Voltage Protection (OVP) – REQUIRED
The over voltage sense circuitry and reference shall reside in packages that are
separate and distinct from the regulator control circuitry and reference. No single
point fault shall be able to cause a sustained over voltage condition on any or all
outputs. The supply shall provide latch-mode over voltage protection as defined in
Table 4-12: Over Voltage Protection
Output
Minimum (V)
Nominal (V)
Maximum (V)
+12 VDC
(or 12V1DC and 12V2DC)
13.4
15.0
15.6
+5VDC
5.74
6.3
7.0
+3.3VDC
3.76
4.2
4.3
+5VSB
1
5.74
6.3
7.0
NOTE:
Over voltage protection is RECOMMENDED but not REQUIRED for this output. While over
voltage protection is not required for this output, system damage may occur in the case
of an over voltage event.
Summary of Contents for ATX 3.0
Page 69: ...LFX12V Specific Guidelines 2 0 336521 69 Figure 12 2 Mechanical Details...
Page 70: ...LFX12V Specific Guidelines 2 0 70 336521 Figure 12 3 PSU Slot Feature Detail...
Page 71: ...LFX12V Specific Guidelines 2 0 336521 71 Figure 12 4 Recommended Chassis Tab Feature...
Page 77: ...SFX12V Specific Guidelines 4 0 336521 77 Figure 14 3 Top Mount Fan Profile Mechanical Outline...
Page 82: ...SFX12V Specific Guidelines 4 0 82 336521 Figure 14 10 PS3 Mechanical Outline...
Page 87: ...TFX12V Specific Guidelines 3 0 336521 87 Figure 15 6 Suggested Mounting Tab chassis feature...
