Intel TFX12V manual Contents

TFX12V Power Supply Design Guide

Thin Form Factor with 12-V Connector

Version 2.0

Contents

1	Introduction			7
	1.1	TFX12V Scope		7
	1.2	TFX12V Overview		7
		1.2.1	Small System Optimized Profile	7
		1.2.2	Improved Acoustics	8
	1.3	Key Changes for TFX12V Version 2.0		8
		1.3.1	Increased +12 VDC Output Capability	8
		1.3.2	Minimum Efficiency	8
		1.3.3	Main Power Connector	8
		1.3.4	Separate Current Limit for 12V2 on the 2x2 Connector	8
	1.4	Terminology		9
2	Electrical		........................................................................................................	10

2.1AC Input 10

	2.1.1	Input Over Current Protection	10
	2.1.2	Inrush Current Limiting	10
	2.1.3	Input Under Voltage	10
	2.1.4	Regulatory	11
	2.1.5	Catastrophic Failure Protection	12
2.2	DC Output		12
	2.2.1	DC Voltage Regulation	12
	2.2.2	Remote Sensing	12
	2.2.3	Typical Power Distribution	13
	2.2.4	Power Limit / Hazardous Energy Levels	16
	2.2.5	Efficiency General	16
	2.2.6	Other Low Power System Requirements	18
	2.2.7	Output Ripple/Noise	18
	2.2.8	Output Transient Response	19
	2.2.9	Capacitive Load	20
	2.2.10	Closed-loop Stability	20
	2.2.11	+5 VDC / +3.3 VDC Power Sequencing	20
	2.2.12	Voltage Hold-up Time	20
2.3 Timing / Housekeeping / Control			21
	2.3.1	PWR_OK	22
	2.3.2	PS_ON#	22
	2.3.3	+5 VSB	23
	2.3.4	Power-on Time	23
	2.3.5	Rise Time	24
	2.3.6	Overshoot at Turn-on /Turn-off	24
	2.3.7	Reset after Shutdown	24
	2.3.8	+5 VSB at AC Power-down	24
2.4	Output Protection		24
	2.4.1	Over Voltage Protection	24
	2.4.2	Short-circuit Protection	25

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