Enhance Electronics Co.,LTD

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Product Specification

2.3 Output Ripple

2.3.1 Ripple regulation

Parameter

Ripple&Noise

Unit

+3.3V

50

mVp-p

+5V

50

mVp-p

+12V1

120

mVp-p

+12V2

120

mVp-p

-12V

120

mVp-p

+5VSb

50

mVp-p

2.3.2 Definition

The ripple voltage of the outputs shall be measured at the pins of the output connector

when terminated in the load impedance specified in figure1.Ripple and noise are measured

at the connectors with a 0.1uF ceramic capacitor and a 10uF electrolytic capacitor to

simulate system loading. Ripple shall be measured under any condition of line voltage,

output load, line frequency, operation temperature.

2.3.3 Ripple voltage test circuit

AC H ot

AC N eu tra l

Power Supply

V ou t

V return

10uF

0.1uF

L oad

AC Grou nd

Figure 1. Ripple voltage test circuit

2.4 Overshoot

Any overshoot at turn on or turn off shall be less 10% of the nominal

voltage value, all outputs shall be within the regulation limit of section

2.0 before issuing the power good signal of section 5.0.

AC H ot

AC N eu tra l

Power Supply

V ou t

V return

10uF

0.1uF

L oad

Scope

AC Grou nd

AUDIT:________李 復 新 _______CHECK:______________DESIGN:___

ENP7000 80Plus S SPEC REV: 4 0

4 OF 10

2009/2/9