Intel ATX12VO User Manual

Electrical
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4.2 DC Output (Required)
The Single Rail Desktop Power Supply will use +12V for all main power to the
computer with a +12VSB that will be used in Sleep, ALPM, or Off type modes. The
+12V power can be split into multiple 12V rails to comply with 240VA safety
requirements or be one large 12V rail depending on power supply and system
manufacturing needs.
4.2.1 DC Voltage Regulation (Required)
The DC output voltages are required to remain within the regulation ranges shown in
the Table 4-2
, when measured at the load end of the output connectors under all line,
load, and environmental conditions specified in Chapter 7.
The lower voltage range for +12V is allowed to be -7% to allow for the power
excursion requirements now described in Section 3.1
. To compensate for these power
excursions the nominal voltage could be changed to 12.1 or 12.2 Volts, depending on
Power Supply design.
Table 4-2: DC Output Voltage Regulation
Output Range Min Nominal Max Unit
+12V1DC
1
+5% / -7% +11.20 +12.00 +12.60 V
+12V2DC
2
+5% / -7% +11.20 +12.00 +12.60 V
+12VSB +5% / -7% +11.20 +12.00 +12.60 V
NOTES:
Voltage tolerance is required at all connectors
4.2.2 DC Output Current (Required)
The below table summarizes the expected output transient step sizes for each output.
All items in the below table are REQUIRED, unless specifically called out as
RECOMMENDED.
Table 4-3: DC Output Transient Step Sizes
Output
Maximum Step Size
(% of Rated Output Amps)
Maximum Step Size (A)
+12V1DC
4
40% (Required)
70% (Recommended)
-
+12V2DC
4
85% of CPU supported in Table 2-1
1
-
+12V3/4
4
Steps from 100%  300%
3
30%  100%
2
+12VSB - 0.5

Intel ATX12VO Specifications

General

Brand	Intel
Model	ATX12VO
Category	Power Supply
Language	English