Intel ATX12VO User Manual

Electrical
613768 45
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 the
below table.
Table 4-15: Over Voltage Protection
Output Minimum (V) Nominal (V) Maximum (V)
+12 VDC
(Or 12V1DC and 12V2DC)
13.4 15.0 15.6
+12VSB
1
13.4 15.0 15.6
NOTE:
1. 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.
4.5.2 Short Circuit Protection (SCP) (Required)
An output short circuit is defined as any output impedance of less than 0.1 Ohm. The
power supply shall shut down and latch off for shorting +12V DC rails to return. The
+12V1 DC and 12V2 DC should have separate short circuit and over current
protection. Shorts between main output rails and +12VSB shall not cause any damage
to the power supply. The power supply shall either shut down and latch off or fold
back for shorting the negative rails. +12VSB must be capable of being shorted
indefinitely. When the short is removed, it is recommended that the power supply
shall recover automatically or by cycling PS_ON#. Optionally, the power supply may
latch off when a +12VSB short circuit event occurs. The power supply should
withstand a continuous short circuit to the output without damage or overstress to the
unit (for example, to components, PCB traces, and connectors) under the input
conditions specified in Table 4-1
.
4.5.3 No-Load Situation (Required)
No damage or hazardous condition shall occur with all the DC output connectors
disconnected from the load. The power supply may latch into the shutdown state.
4.5.4 Over Current Protection (OCP) (Required)
Current protection shall be designed to limit the current to operate within safe
operating conditions.
Over current protection schemes, where only the voltage output that experiences the
over current event is shut off, may be adequate to maintain safe operation of the
power supply and the system; however, damage to the motherboard or other system

Intel ATX12VO Specifications

General

Brand	Intel
Model	ATX12VO
Category	Power Supply
Language	English