SSI America ERP2U manual Contents

			SSI
			ERP2U Power Supply Design Guide, V2.31
Contents
1	Purpose		7
2	Conceptual Overview		7
3	Definitions/Terms/Acronyms		8
4	Mechanical Overview		9
4.1	Acoustic Requirements		10
4.2	Airflow Requirements		10
4.3	Temperature Requirements		10
5	AC Input Requirements		11
5.1	AC Inlet Connector		11
5.2	Redundant AC Inlets		11
5.3	AC Input Voltage Specification		11
5.4	Input Under Voltage		12
5.5	Efficiency		12
5.6	AC Line Dropout		12
5.7	AC Line Fuse		13
5.8	AC Inrush		13
5.9	AC Line Transient Specification		13
5.10		AC Line Fast Transient Specification	14
6	DC Output Specification		15
6.1	Output Connectors		15
6.1.1		Required Baseboard power connector	15
6.1.2		+12V4 Baseboard Power Connector	16
6.1.3		Required Peripheral Power Connectors	16
6.1.4		Required Floppy Power Connector	16
6.1.5		Serial ATA Power Connector	17
6.1.6		Server Signal Connector	17
6.2	Grounding		18
6.3	Remote Sense		18
6.4	Output Power/Currents		18
6.4.1		Standby Outputs	21
6.4.2		Fan operation in standby mode	21
6.5	Voltage Regulation		21
6.6	Dynamic Loading		22
6.7	Capacitive Loading		22
6.8	Ripple / Noise		23
6.9	Redundancy		24
6.10		Hot Swap Requirements	24
6.11		Timing Requirements	25
7	Protection Circuits		28
7.1	Current Limit		28
7.2	240VA Protection		28
7.3	Over Voltage Protection		29
7.4	Over Temperature Protection		29
8	Control and Indicator Functions		30
8.1	PSON#		30
8.2	PWOK (Power OK)		31
8.3	SMBus Communication		31
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