Intel ATX12VO User Manual

Electrical
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components may occur. The recommended over current protection scheme is for the
power supply to latch into the shutdown state. PSU connectors, cables and all other
components should not be melted or damaged prior reaching to the OCP trigger.
4.5.5 Over Temperature Protection (OTP) (Required)
The power supply shall include an over-temperature protection sensor, which can trip
and shut down the power supply at a preset temperature point. Such an overheated
condition is typically the result of internal current overloading or a cooling fan failure.
If the protection circuit is non-latching, then it should have hysteresis built in to avoid
intermittent tripping. PSU connectors, cables and all other components should not be
melted or damaged prior reaching to the OCP trigger.
4.5.6 Output Bypass (Required)
The output return shall be connected to the power supply chassis and will be
connected to the system chassis by the system components.
4.5.7 Separate Current Limit for 12V2 (Optional)
The 12 V rail on the 2x2 power connector should be a separate current limited output
to meet the requirements of UL and EN 60950. This only applies if the PSU is trying to
meet a 240VA Energy Hazard Safety Requirement.
4.5.8 Overall Power Supply Efficiency Levels
Test the efficiency of the power supply at nominal input voltage of 115 VAC input and
230 VAC input, under the load conditions defined in the Generalized Test Protocol for
Calculating the Energy Efficiency of Internal Ac-Dc and Dc-Dc Power Supplies
document. This document defines how to determine full load criteria based on the
label of each rail of the power supply. The loading condition for testing efficiency
represents fully loaded systems, typical (50%) loaded systems, and light (20%)
loaded systems.
One of the main reasons to move to a Single Rail Desktop Power Supply design is the
opportunity to increase overall efficiency. With that the Efficiency requirements are
equivalent to 80 Plus Bronze levels with the 80 Plus program. The Efficiency
requirements listed below are applicable to AC Input voltage of 115V.
Table 4-16: Efficiency Load Minimum Requirements
Loading
Full Load
(100%)
Typical Load
(50%)
Light Load
(20%)
REQUIRED Minimum Efficiency 82% 85% 82%
80 Plus Silver
(For Reference in Table 4-17
Only)
85% 88% 85%
Low Load Efficiency:

Intel ATX12VO Specifications

General

Brand	Intel
Model	ATX12VO
Category	Power Supply
Language	English