Intel TFX12V Typical Power Distribution, Cross Loading Graph for 180W Configuration, w atts, 3.3V

TFX12V Power Supply Design Guide

Thin Form Factor with 12-V Connector

Version 2.0

2.2.3Typical Power Distribution

DC output power requirements and distributions will vary based on specific system options and implementation.

Significant dependencies include the quantity and types of processors, memory, add-in card slots, and peripheral bays, as well as support for advanced graphics or other features. Table 3, through Table 6 show the power distribution and cross loading tables for power supplies in the range of 180 W to 240 W. It is ultimately the responsibility of the designer to define a power budget for a given target product and market.

Table 3. Typical Power Distribution for 180 W TFX12V Configurations

Output

Minimum Current

(amps)

Rated Current

(amps)

Peak Current

(amps)

+12 VDC	1.0	13.0		15.0
+5 VDC	0.3	12.0 (Note)
+3.3 VDC	0.5	16.7 (Note)
-12 VDC	0.0	0.3
+5 VSB	0.0	2.0		2.5
Note: Total combined output of 3.3 V and 5 V is			63 W

Peak currents may last up to 17 seconds with not more than one occurrence per minute

			180W Cross Regulation
			(5V rail + 3.3V rail vs. 12V)
	70
(w atts)	60
	50
er	40				Combined Power
pow
	30				(5V rail + 3.3V rail)
3.3V
	20
+	10
5V
	0
	0	50	100	150	200
		12V power (watts)

Figure 2. Cross Loading Graph for 180W Configuration