Figure 32. Differential Noise Test Setup; Table 83. Output Voltage Timing - Intel S2600CW Technical Product Specification

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Power Supply Specification Guidelines

GENERAL NOTES:

Note: When performing this test, the probe clips and capacitors should be located close to the load.

10.3.2.15

Timing Requirements

Below are timing requirements for the power on/off of the PDB DC/DC converters. The +3.3V,

+5V and +12V output voltages should start to rise approximately at the same time. All outputs

must rise monotonically.

Output voltage rise time for each main output; 3.3V, 5V, -

12V, and 5Vstby.

The main DC/DC converters (3.3V, 5V, -12V) shall be in

regulation limits within this time after the 12V input has

reached 11.4V.

The main DC/DC converters (3.3V, 5V, -12V) must drop

below regulation limits within this time after the 12V input

has dropped below 11.4V.

The 5Vstby converter shall be in regulation limits within this

time after the 12Vstby has reach 11.4V.

The 5Vstby converter must power off within this time after

the 12Vstby input has dropped below 11.4V.

10.3.2.16

Residual Voltage Immunity in Standby Mode

Each DC/DC converter is immune to any residual voltage placed on its respective output

(typically a leakage voltage through the system from standby output) up to 500mV. This

residual voltage does not have any adverse effect on each DC/DC converter, such as: no

additional power dissipation or over-stressing/over-heating any internal components or

adversely affecting the turn-on performance (no protection circuits tripping during turn on).

While in Stand-by mode, at no load condition, the residual voltage on each DC/DC converter

output does not exceed 100mV.

146

OUT

AC HOT

POWER SUPPLY

RETURN

AC NEUTRAL

AC GROUND

LOAD THE OUTPUT WITH ITS MINIMUM

LOAD CURRENT.

CONNECT THE PROBES AS SHOWN.

REPEAT THE MEASUREMENTS WITH THE

MAXIMUM LOAD ON THE OUTPUT.

SCOPE NOTE:

USE A TEKTRONIX 7834 OSCILLOSCOPE WITH 7A13 AND

DIFFERENTIAL PROBE P6055 OR EQUIVALENT.