ATX Version 3.0 Multi Rail Desktop Platform Power Supply

Design Guide

ID 336521
Date 01/02/2022
Version 2.0
Public
Document Table of Contents

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.

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

+5VSB1

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.