Intel TFX12V DC Output, Catastrophic Failure Protection, DC Voltage Regulation, Remote Sensing

TFX12V Power Supply Design Guide

Thin Form Factor with 12 V Connector

Version 2.0

2.1.5Catastrophic Failure Protection

Should a component failure occur, the power supply should not exhibit any of the following:

•Flame

•Excessive smoke

•Charred PCB

•Fused PCB conductor

•Startling noise

•Emission of molten material

•Earth ground fault (short circuit to ground or chassis enclosure)

2.2DC Output

2.2.1DC Voltage Regulation

The DC output voltages shall remain within the regulation ranges shown in Table 2, when measured at the load end of the output connectors under all line, load, and environmental conditions. The voltage regulation limits shall be maintained under continuous operation for any steady state temperature and operating conditions specified in Section 4.

Table 2. DC Output Voltage Regulation

Output

+12 V1DC

+12 V2DC (Note)

+5 VDC

+3.3 VDC

-12 VDC

+5 VSB

Range

±5%

±5%

±5%

±5%

±10%

±5%

Minimum

+11.40

+11.40

+4.75

+3.14

-10.80

+4.75

Nominal

+12.00

+12.00

+5.00

+3.30

-12.00

+5.00

Maximum

+12.60

+12.60

+5.25

+3.47

-13.20

+5.25

Unit

Volts

Volts

Volts

Volts

Volts

Volts

Note: At +12 VDC peak loading, regulation at the +12 VDC output can go to ± 10%.

2.2.2Remote Sensing

The +3.3 VDC output should have provisions for remote sensing to compensate for excessive cable drops. The default sense should be connected to pin 11 of the main power connector. The power supply should draw no more than 10 mA through the remote sense line to keep DC offset voltages to a minimum.

12