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ATX12V Power Supply Design Guide
Version 2.0 Final Review Copy
40
6.3. Input Line Current Harmonic Content and Line Flicker
For sales in EU (European Union) or Japan the power supply shall meet the requirements of
EN61000-3-2 Class D and the Guidelines for the Suppression of Harmonics in Appliances
and General Use Equipment Class D for harmonic line current content at full rated power.
See Table 16 for the harmonic limits.
Table 16. Harmonic Limits, Class D Equipment
Per: EN 61000-3-2 Per: JEIDA MITI
Harmonic Order
n
Maximum permissible Harmonic
current at 230 VAC / 50 Hz
in Amps
Maximum permissible Harmonic
current at 100VAC / 50 Hz in Amps
Odd harmonics
3
5
7
9
11
13
15
≤ n ≤39
2.3
1.14
0.77
0.4
0.33
0.21
0.15 x (15/n)
5.29
2.622
1.771
0.92
0.759
0.483
0.345 x (15/n)
6.4. Magnetic Leakage Fields
A PFC choke magnetic leakage field should not cause any interference with a high-
resolution computer monitor placed next to or on top of the end-use chassis.