Intel ATX Power Supply Design Guide

Version 0.9

3.1.4.2.3 Ring Wave, ANSI C62.45-1992

The crest value of the first half peak of the injected oscillatory wave will be 3.0 kV open circuit, with 200 and 500 A short circuit currents for the common and the normal modes of transient surge injection, respectively. No unsafe operation is allowed under any condition. No user-noticeable performance degradation for 1 kV Differential Mode (DM) or 2 kV Common Mode (CM) is allowed. Automatic or manual recovery is allowed for other conditions.

3.1.4.2.4 Electrostatic Discharge, IEC801-2/IEC1000-4-2

In addition to IEC 801-2 / IEC1000-4-2, the following ESD tests should be conducted. Each surface area of the unit under test should be subjected to twenty (20) successive static discharges, at each of the following voltages: 2 kV, 3 kV, 4 kV, 5 kV, 6 kV, 8 kV, 10 kV, 15 kV, and 25 kV.

Performance criteria:

∙All power supply outputs shall continue to operate within the parameters of this design guide, without glitches or interruption, while the supply is operating as defined and subjected to 2 kV through 15 kV ESD pulses. The direct ESD event shall not cause any out-of-regulation conditions such as overshoot or undershoot. The power system shall withstand these shocks without nuisance trips of the overvoltage protection, overcurrent protection, or remote +5VDC shutdown circuitry.

∙The power supply, while operating as defined, shall not have a component failure when subjected to any discharge voltages up to and including 25 kV. Component failure is defined as any malfunction of the power supply that causes component degradation or failure requiring component replacement to correct the problem.

3.1.4.3 Radiated Immunity 3.1.4.3.1 IEC801-3/IEC 1000-4-3

Frequency

Electric Field Strength

 

 

27 MHz to 500 MHz, unmodulated

3 V/m

 

 

3.1.4.3.2 ENV 50140

Frequency

Electric Field Strength

80 to 1000 MHz, 1 kHz sine wave, 80% AM

3 V/m

 

 

3.1.4.3.3 Radio Frequency Common Mode, ENV 50141

Frequency

Level

 

 

.15 to 30 MHz, 1 kHz sine wave, 80% AM

3 V

 

 

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