S5000VSA datasheet(57/86 Pages) INTEL

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Intel® Server Board S5000VSA TPS

Design and Environmental Specifications

Revision 1.4

Intel order number – D36978-006

8.3.2

Grounding

The ground of the pins of the power supply output connector provides the power return path.

The output connector ground pins are connected to safety ground (power supply enclosure).

The power supply must be provided with a reliable protective earth ground. All secondary

circuits are connected to protective earth ground. Resistance of the ground returns to chassis

does not exceed 1.0 m

Ω. This path may be used to carry DC current.

8.3.3

Standby Outputs

The 5 VSB output is present when an AC input greater than the power supply turn on voltage is

applied.

8.3.4

Remote Sense

The power supply has remote sense return (ReturnS) to regulate out ground drops for all output

voltages; +3.3 V, +5 V, +12 V1, +12 V2, -12 V, and 5 VSB. The power supply uses remote

sense to regulate out drops in the system for the +3.3 V, +5 V, and 12 V1 outputs. The remote

sense input impedance to the power supply is greater than 200

Ω on 3.3 VS, 5 VS. This is the

value of the resistor connecting the remote sense to the output voltage internal to the power

supply. Remote sense is able to regulate out a minimum of 200 mV drop on the +3.3 V output.

The remote sense return (ReturnS) is able to regulate out a minimum of 200 mV drop in the

power ground return. The current in any remote sense line is less than 5 mA to prevent voltage

sensing errors. The power supply operates within specification over the full range of voltage

drops from the power supply’s output connector to the remote sense points.

8.3.5

Voltage Regulation

The power supply output voltages are within the following voltage limits when operating at

steady state and dynamic loading conditions. These limits include the peak-peak ripple/noise.

All outputs are measured with reference to the return remote sense signal (ReturnS). The 5 V,

12 V1, 12 V2, –12 V and 5 VSB outputs are measured at the power supply connectors

referenced to ReturnS. The +3.3 V is measured at the remote sense signal (3.3 VS) located at

the signal connector.

Table 43. Voltage Regulation Limits

Parameter

Tolerance

MIN

NOM

MAX

Units

+ 3.3V

- 5% / +5%

+3.14

+3.30

+3.46

Vrms

+ 5V

- 5% / +5%

+4.75

+5.00

+5.25

Vrms

+ 12V1

- 5% / +5%

+11.40

+12.00

+12.60

Vrms

+ 12V2

- 5% / +5%

+11.40

+12.00

+12.60

Vrms

- 12V

- 5% / +9%

-11.40

-12.00

-13.08

Vrms

+ 5VSB

- 5% / +5%

+4.75

+5.00

+5.25

Vrms

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