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SSI America ERP2U User's Manual

1. 0 5 A 24 A 12V1 OA 16A 18A 12V2 OA 16A 18A 12V3 0 9A 14A 12V4 0 1A 8A 13A 12 V OA 0 5A 5 VSB 0 1A 2 0A Maximum continuous total DC output power should not exceed 650 W Maximum continuous combined load on 3 3 VDC and 5 VDC outputs shall not exceed 140 W Maximum Peak total DC output power should not exceed 770 W 19 SSI ERP2U Power Supply Design Guide V2 31 NSO DOT BO NCE O OTRO NS Peak power and current loading shall be supported for a minimum of 10 second Maximum combined current for the 12 V outputs shall be 45 A Maximum 12V combined peak current shall be 54 A The 3 3V and 5V may be supply by the module or DC DC converters powered from 12V in the cage Table 16 700 W Load Ratings Voltage Minimum Continuous Maximum Continuous Peak 3 3 V7 0 8 A 24 A 5 V 0 5 A 30 A 12V1 OA 16A 18A 12V2 OA 16A 18A 12V3 0 9A 16A 18A 12V4 0 1A 16A 18A 12 V OA 0 5A 5 VSB 0 1A 3 0A 35A Maximum continuous total DC output power should not exceed 700 W Maximum continuous combined load on 3 3 VDC and 5 VDC outputs shall not exceed 170 W Maximum Peak total DC output power should not exceed 780 W Peak power and current loading shall be supported for a minimum of 10 second Maximum combined current for the 12 V outputs shall be 56 A Maximum 12V combined peak current shall be 62 A The 3 3V and 5V may be supply by the module or DC DC converters powered from 12V in the cage Table 17 750 W Load Rating
2. Inlets STATUS Recommended The power supply assembly may have dual redundant AC inlets The power supply shall be able to operate over its full specified range of requirements with either or both AC input powered If there is a loss of one AC inlet the power supplies shall continue to operate with no interruption of performance It is required that all redundant power supply modules be present to support redundant AC inlets 5 3 AC Input Voltage Specification STATUS Required The power supply must operate within all specified limits over the following input voltage range Harmonic distortion of up to 10 THD must not cause the power supply to go out of specified limits The power supply shall operate properly at 85 VAC input voltage to guarantee proper design margins SSI ERP2U Power Supply Design Guide V2 31 Table 3 AC Input Rating PARAMETER MIN RATED MAX Voltage 110 90 Vims 100 127 Vims 140 Vims Voltage 220 180 Vims 200 240 Vims 264 Vims Frequency 47 Hz 63 Hz 5 4 Input Under Voltage STATUS Required The power supply shall contain protection circuitry such that application of an input voltage below the minimum specified in section 5 3 shall not cause damage to the power supply 5 5 Efficiency STATUS Recommended Required The following table provides recommended and required minimum efficiency levels These are provided at three different load l
3. Power Supply Design Guide V2 31 AC line shall not cause damage to the power supply In the case of redundant AC inputs the AC line dropout may occur on either or both AC inlet 5 7 AC Line Fuse STATUS Required The power supply shall incorporate one input fuse on the LINE side for input over current protection to prevent damage to the power supply and meet product safety requirements Fuses should be slow blow type or equivalent to prevent nuisance trips AC inrush current shall not cause the AC line fuse to blow under any conditions All protection circuits in the power supply shall not cause the AC fuse to blow unless a component in the power supply has failed This includes DC output load short conditions 5 8 AC Inrush STATUS Required The power supply must meet inrush requirements for any rated AC voltage during turn on at any phase of AC voltage during a single cycle AC dropout condition during repetitive ON OFF cycling of AC and over the specified temperature range Top The peak inrush current shall be less than the ratings of its critical components including input fuse bulk rectifiers and surge limiting device STATUS Recommended An additional inrush current limit is recommended for some system applications that require multiple systems on a single AC circuit AC line inrush current shall not exceed 40 A peak After one quarter of the AC cycle the input current should be
4. docking at the same time as DC Extraction The module is extracted from the cage and both AC and DC disconnect at the same time This could occur in standby or power on mode No damage or arcing shall occur to the DC or AC contacts which could cause damage Insertion The AC and DC connect at the same time as the module is inserted into the cage No damage to the connector contacts shall occur The module may power on or come up into standby mode Many variations of the above are possible Supplies need to be compatible with these different variations depending upon the sub system construction In general a failed off by internal latch or external control supply 24 SSI ERP2U Power Supply Design Guide V2 31 may be removed then replaced with a good power supply however hot swap needs to work with operational as well as failed power supplies The newly inserted power supply may get turned on by inserting the supply into the system or by system management recognizing an inserted supply and explicitly turning it on 6 11 Timing Requirements STATUS Required These are the timing requirements for the power assembly operation The output voltages must rise from 10 to within regulation limits Tyout rise Within 5 to 200ms The 3 3 V 5 V and 12 V output voltages should start to rise at about the same time All outputs must rise monotonically The 5 V output needs to be greater than the 3 3 V output during any point of
5. lene aes 31 SSI ERP2U Power Supply Design Guide V2 31 8 4 Power Supply Management Interface 31 8 5 Field Replacement Unit FRU Signals cccceeseeceeeeeeeeeeeeeee cece eeeeaeeseaeeseeeeesaaeeesaaesseeeeseaeeesaeeeeaeseneees 32 8 5 1 Module wi EE E 32 8 5 2 Module FRU REN CM e dE EE 32 8 61 LED Indicators a das 33 9 MTB ii a 35 10 Agency RequirementS onmmccnocccnnnnnaninnnnnnnn ceca 35 Figures Figure 1 Enclosure Da te ET 9 Figure 2 System Airflow Impecdance AA 10 Figure 3 Output Voltage Timing 25 Figure 4 Turn ONO TF TIMING retira tia ideas 27 Figure 5 PSON Signal Characteristics oooocconnnnconnicnncconncccnnonnnnnarnnn arc cnnrrnn nn 30 Tables Table 1 Recommended Acoustic Sound Power Levels ooooococccinococonococoncccconnnonannnnoncccnnr cnn nn rn nnnn crac ran rra aan 10 Table 2 Thermal Requirements osinn an A iaai Aan ANA AAA nene 11 Table 37 AG Input Ratinguism dust ta a A Ad 12 Table 4 Efficlncy ereechen a 12 Table 5 Efficiency Loading Table Error Bookmark not defined Table 6 AC Line Sag Transient Pertommmance nn nnnnnn rn rn naar nn nn naar nr nr rar nr rr naar nnnnnnnns 13 Table 7 AC Line Surge Transient Performance ccoococcccconoccncnonaonncnnnnoncncnanonnncnanonnnnnnnnn rn nn naar nn nn naar nn nr naar Enaren nnne nnan 14 Table 8 P1 Baseboard Power Connechor nn nn naar nn nn naar nn rn naar nn nn n naar nn rnnnrnrrrnnarrnnnnnnns 15 Table 9 Processor Power Connechor ttnan tA Annt EAAS
6. or hot swappable The exterior face of the cage accepts hot swappable power supply modules The cage distributes output power from the modules to a wire harness Cooling fans EMI filtering and IEC inlet connector s may be located in the modules or cage a 400 0 350 0 1 0 gt a g 30 MAX HANDLE LATCH SIDE VIEW 6 32 THD Le 118 0 E EE 6 32 THD 4 PLACES 2 PLACES La 96 0 0 am m 113 0 0 5 e EEE ENE EA EEE HH Y al x 15 0 0 5 Xp MODULE i i 16 0 0 5 i 56 8 1 0 6 0 0 5 gt t t 108 0 0 5 p REAR VIEW FRONT VIEW Figure 1 Enclosure Drawing SSI ERP2U Power Supply Design Guide V2 31 4 1 Acoustic Requirements STATUS Recommended It is recommended the power supplies have a variable speed fan based on temperature and loading conditions There are three different acoustic sound power levels defined at different ambient temperatures and loading conditions Table 1 Recommended Acoustic Sound Power Levels Idle Typical Max Ambient Temperature 28 C 28 C 45 C Loading 30 60 100 Sound Power BA 5 2 5 6 6 1 4 2 Airflow Requirements STATUS Recommended The air shall exit the power supply on the AC inlet face The power supply shall meet all requirements with the below system airflow impedance presented to th
7. supply must maintain normal performance within specified limits This testing must be completed by the system EMI engineer Conformance must be designated with the European Union CE Marking Specific immunity level requirements are left to customer requirements 35
8. 31 Required The power supply shall be stable and meet all requirements except dynamic loading requirements with the following capacitive loading ranges Note Up to 10 000 uF of the 12V capacitive loading may be on the 12V1 output Table 22 Capacitve Loading Conditions Output MIN MAX Units 3 3 V 10 12 000 uF 5 V 10 12 000 uF 12 V 10 11 000 uF 12 V 1 350 pF 5 VSB 1 350 uF 6 8 Ripple Noise STATUS Required The maximum allowed ripple noise output of the power supply is defined in Table 24 This is measured over a bandwidth of 0 Hz to 20 MHz at the power supply output connectors A 10 uF tantalum capacitor in parallel with a 0 1 uF ceramic capacitor are placed at the point of measurement Table 23 Ripple and Noise 3 3 V 5 V 12 V 12 V 5 VSB 50 mVp p 50 mVp p 120 mVp p 120 mVp p 50 mVp p 23 SSI ERP2U Power Supply Design Guide V2 31 6 9 Redundancy The power sub system may have different levels of redundancy depending upon the availability requirements of the system The Required Recommended and Optional items are broken down here To be redundant each item must be in the hot swap power supply module STATUS Required The power sub system shall have redundancy of the main power converters for the power factor correction stage and the main 12V output STATUS Recommended It is recommended the power sub system have redundan
9. AE EEANN EEANSEEAESAE EEAS SEEEEESSEEAS SEE EENE EE EREE 15 Table 10 Peripheral Power Connectors cccccccccccsssececessneceeessneeeeesseeeeessaeeecssaeeesssaeeeeesaeeeeseseeeesseeeeesssueeeeneed 16 Table 11 P9 Floppy Power Connechor ane aeii era enpi A A a E Ea EAA Cee eA Taea KiS anA aaa iant 16 Table 12 Floppy Power Connector esmae e ee edea ieee Nae RE E AAR 17 Table 13 Server Signal Connechor 17 Table 14 550 W Load Ratings EE 18 Table 15 Ce RAMOS atenerne gaddien dier 19 Table 16 650 W Load E due CN 19 Tabl 17 700 W Load Ratings eacoir a i a e E AAE T E E vin dannede ed 20 Table 18 750 W Load Ratings aisiara ikerin aea Ka ai va dene dd 20 T bl 19 800 W Load Ratings merri ani a aaner EN Ai T AE aa in tada 21 Table 20 Voltage Regulation Lime 22 Table 21 Optional 5V Regulation Lime 22 Table 22 Transient Load Requirements ooooccccnnoccccnonoccncnononncncnnnoncnnnnnoncnnnnno nn nn naar nn cnn nan nr rr nan nn cr nan rre nan nn rr nnnnnnccinnns 22 Table 23 Capacitve Loading Condtons nana nnnc crono 23 Table 24 Ripple Nee 23 Table 25 Output Voltage Timing 25 Table 26 Turn On Off TIMING vist Nee 26 Fable 27 Over Current Protection aiii NENNEN ee aida nadaa dad hna haa dd lid 28 Table 28 Over Current Protect vacios iio nidad dad CA ad A did AA ide AA dd AAA A ah 28 Table 29 Over Voltage Limits r ren nono norris 29 Table 30 PSON Signal Characi nslic ENEE 30 Table 31 PWOK Signal Characteretce nn nn nnnnr
10. All other output fields Set for 5 V amp 3 3V combined wattage of 115 W Not supported 00h value Field Description Five outputs are to be defined from 1 to 5 as follows 3 3 V 5 V 12 V 12V and 5 VSB Set for Standby on 5 VSB No Standby on all others Format per IPMI specification using parameters in the EPS12V specification 8 6 LED Indicators STATUS Required There shall be a single bi color LED OR two LEDs one AMBER and one GREEN on each hot swap power module to indicate power supply status When AC is applied to the power supply and standby voltages are available the GREEN LED shall BLINK The GREEN LED shall turn ON to indicate that all the power outputs are 33 SSI ERP2U Power Supply Design Guide V2 31 available The AMBER LED shall turn ON to indicate that the power supply has failed shutdown due to over current or shutdown due to over temperature Refer to Table 35 LED Indicators for conditions of the LED s Table 34 LED Indicators POWER SUPPLY CONDITION Power Supply LED s AMBER GREEN No AC power to all PSU No AC power to this PSU only AMBER AC present Only Standby Outputs On B NK N LI Power supply DC outputs ON and OK O Power supply failure includes over ON OFF voltage over temperature Current limit OFF The LED s shall be visible on the power supply s exterior face The LED location shall meet ESD requirements LED shall be securely mounted in s
11. PSON Open or High OFF MIN MAX Logic level low power supply ON OV 1 0V Logic level high power supply OFF 20 5 25 V Source current Vpson low 4 mA Power up delay Tpson on delay iad 400 ms PWOK delay T pson pwok 50 ms Hysteresis gt 0 3V and or other de bounce method Disabled lt 1 0V gt 20V PSis e PS is enabled disabled Enabled OV 1 0V 2 0V 5 25V Figure 5 PSON Signal Characteristics 30 SSI ERP2U Power Supply Design Guide V2 31 8 2 PWOK Power OK STATUS Required PWOK is a power OK signal and will be pulled HIGH by the power supply to indicate that all the outputs are within the regulation limits of the power supply When any output voltage falls below regulation limits or when AC power has been removed for a time sufficiently long so that power supply operation is no longer guaranteed PWOK will be deasserted to a LOW state See Figure 4 for a representation of the timing characteristics of PWOK The start of the PWOK delay time shall be inhibited as long as any power supply output is in current limit Table 30 PWOK Signal Characteristics 5V TTL Compatible output signal Signal Type PWOK High Power OK PWOK Low Power Not OK MIN MAX Logic level low voltage Isink 4 mA OV 0 4 V Logic level high voltage Isource 200 pA 2 4 V 5 25 V PWOK delay Towok on 200 ms 1000 ms PWOK rise and fall time 100 us Power down delay T pwok off Um 8 3 SMBus Communicatio
12. Purple 21 5 VDC Red 10 12 V3 Yellow 22 5 VDC Red 11 12 V3 Yellow 23 5 VDC Red 12 3 3 VDC Orange 24 COM Black If 240VA limiting is not a requirement for the power supply than all 12V outputs are common and may have the same wire color yellow Table 8 Processor Power Connector Pin Signal 18 AWG color Pin Signal 18 AWG Color 1 COM Black 5 12 Vi Yellow Black Stripe 2 COM Black 6 12 Vi Yellow Black Stripe 3 COM Black 7 12 V2 Yellow 4 COM Black 8 12 V2 Yellow 15 SSI ERP2U Power Supply Design Guide V2 31 If 240VA limiting is not a requirement for the power supply than all 12V outputs are common and may have the same wire color yellow 6 1 2 12V4 Baseboard Power Connector STATUS Required for 700W 750W and 800W power levels Systems that require more then 16A of 12V current to the baseboard will require this additional 2x2 power connector This is due to the limited 12V capability of the 2x12 baseboard power connector 12V4 will power this 2x2 connector Pin Signal 18 AWG color Pin Signal 18 AWG Color 1 COM Black 3 12 V4 Yellow Green Stripe 2 COM Black 4 12 V4 Yellow Green Stripe If 240VA limiting is not a requirement for the power supply than all 12V outputs are common and may have the same wire color yellow 6 1 3 Required Peripheral Power Connectors Connector housing Amp 1 480424 0 or equivalent Contact Amp 61314 1 contact or equivalent Table 9 Peripheral Power Connect
13. SSI ERP2U Entry Redundant Power 2U Power Supply Design Guide A Server System Infrastructure SSI Specification For 2U Rack Chassis Power Supplies Version 2 31 SSI ERP2U Power Supply Design Guide V2 31 Revision History Orig Rev Description of Changes Post design guide 00 Added higher power levels up to 800W Added 350mm depth Removed lower power levels Added standby fan operation Added option for tighter 12V regulation Added 12V4 Add new SSI efficiency requirements recommended level amp loading conditions Reduced holdup time requirements to 75 of max load Increase 12V rails for gt 650W Tpwok_on max time reduced to 500msec Change 5VSB to 3 0A for gt 650W Added reference to PSMI spec Modified SMBus section FRU and PSMI to 3 3V with 5V tolerance Modified 240VA section removed common plane change to lt 20A for all 12V outputs Updated sound power amp airflow requirements Remove reference to split and common rails Updated efficiency testing method Increase 5V current to 30A and combined 3 3V 5V power to 160W for the 700 800W power levels Increase 12V1 2 current for 550W 650W power levels Relax require regulation limits Added optional regulation limits Fixed error in 3 3V and 5V loading Increased 3 3V 5V combined power SSI ERP2U Power Supply Design Guide V2 31 Disclaimer THIS SPECIFICATION IS PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER INCLUDING ANY WARRANTY OF MERCHANTABILI
14. TY NONINFRINGEMENT FITNESS FOR ANY PARTICULAR PURPOSE OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL SPECIFICATION OR SAMPLE WITHOUT LIMITATION THE PROMOTERS Intel Corporation NEC Corporation Dell Computer Corporation Data General a division of EMC Corporation Compaq Computer Corporation Silicon Graphics Inc and International Business Machines Corporation DISCLAIM ALL LIABILITY FOR COST OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOST PROFITS LOSS OF USE LOSS OF DATA OR ANY INCIDENTAL CONSEQUENTIAL DIRECT INDIRECT OR SPECIAL AMAGES WHETHER UNDER CONTRACT TORT WARRANTY OR OTHERWISE ARISING IN ANY WAY OUT OF USE OR RELIANCE UPON THIS SPECIFICATION OR ANY INFORMATION HEREIN The Promoters disclaim all liability including liability for infringement of any proprietary rights relating to use of information in this specification No license express or implied by estoppel or otherwise to any intellectual property rights is granted herein This specification and the information herein is the confidential and trade secret information of the Promoters Use reproduction and disclosure of this specification and the information herein are subject to the terms of the S S l Specification Adopter s Agreement Copyright Intel Corporation Dell Computer Corporation Hewlett Packard Company Silicon Graphics Inc International Business Machines Corporation 2002 2003 SSI ERP2U Power Supply Design Guide V2 31 C
15. V2 OA 16A 18A 12V3 0 9A 14A 12V4 0 1A 8A 13A 12V OA 05A 5 VSB 0 1A 20A 1 Maximum continuous total DC output power should not exceed 550 W 2 Maximum continuous combined load on 3 3 VDC and 5 VDC outputs shall not exceed 140 W 3 Maximum Peak total DC output power should not exceed 630 W 4 Peak power and current loading shall be supported for a minimum of 10 second 5 Maximum combined current for the 12 V outputs shall be 38 A 6 Maximum 12V combined peak current shall be 45 A 7 The 3 3V and 5V may be supply by the module or DC DC converters powered from 12V in the cage DN OCT 00 Ee Ap 2 3 Table 14 600 W Load Ratings Voltage Minimum Continuous Maximum Continuous Peak 3 3 V7 0 8 A 24 A 5 V 0 5 A 24 A 12V1 OA 16A 18A 12V2 OA 16A 18A 12V3 0 9A 14A 12V4 0 1A 8A 13A 12V OA 0 5A 5 VSB 0 1A 2 0A Maximum continuous total DC output power should not exceed 600 W Maximum continuous combined load on 3 3 VDC and 5 VDC outputs shall not exceed 140 W Maximum peak total DC output power should not exceed 710 W Peak power and current loading shall be supported for a minimum of 10 second Maximum combined current for the 12 V outputs shall be 42 A Peak current for the combined 12 V outputs shall be 51 A The 3 3V and 5V may be supply by the module or DC DC converters powered from 12V in the cage Table 15 650 W Load Ratings Voltage Minimum Continuous Maximum Continuous Peak 3 3 V7 0 8 A 24 A 5 V
16. cy for the following items however depending upon the system availability requirements these items may be non redundant It is recommended to have redundancy for the output or ing devices fans AC bridge output capacitors 12V converter and 5VSB converter STATUS Optional It is optional to have redundancy for the AC EMI filter components 3 3V output converter and 5V output converter 6 10 Hot Swap Requirements STATUS Required The power supply modules shall be hot swappable Hot swapping a power supply is the process of inserting and extracting a power supply from an operating power system During this process the output voltages shall remain within the limits specified in Table 20 with the capacitive load specified Table 23 The hot swap test must be conducted when the sub system is operating under both static and dynamic conditions The sub system shall not exceed the maximum inrush current as specified in section 5 8 The power supply can be hot swapped by the following methods e AC connecting separately to each module Up to two power supplies may be on a single AC power source Extraction The AC power will be disconnected from the power supply first and then the power supply is extracted from the sub system This could occur in standby mode or powered on mode Insertion The module is inserted into the cage and then AC power will be connected to the power supply module e For power modules with AC
17. e power assembly Remote sense must be able to regulate out a minimum of 200 mV drop on the 3 3 V output The remote sense return ReturnS must be able to regulate out a minimum of 200 mV drop in the power ground return The current in any remote sense line shall be less than 5 mA to prevent voltage sensing errors The power supply must operate within specification over the full range of voltage drops from the power assembly s output connector to the remote sense points 6 4 Output Power Currents STATUS Recommended The following tables define the power and current ratings for different recommended power levels Depending upon the system design the power supply modules may have less outputs than required by the system example 12V and 5VSB If there are less outputs than required by the system on the module the cage shall have additional DC DC converters to generate the voltages not produced by the modules example 12V 5V 12V 3 3V 12V 12V The combined output power of all outputs from the cage shall not exceed the rated output power The power assembly shall meet both static and dynamic voltage regulation requirements over the full load ranges The power sub assembly shall supply redundant power over the full load ranges Table 13 550 W Load Ratings Voltage Minimum Continuous Maximum Continuous Peak 3 3 V7 0 8 A 24 A 5 V7 0 5A 24 A 18 SSI ERP2U Power Supply Design Guide V2 31 12V1 OA 16A 18A 12
18. e power supplies airflow path Figure 2 System Airflow Impedance System Flow Impedance 2U 0 6 Q 05 ra I E 04 g 3 9 03 2 a g 0 2 2 ZS 01 0 0 1 0 5 10 15 20 Power Supply Airflow CFM 4 3 Temperature Requirements STATUS Recommended SSI ERP2U Power Supply Design Guide V2 31 The power supply shall operate within all specified limits over the Top temperature range All airflow shall pass through the power supply and not over the exterior surfaces of the power supply Table 2 Thermal Requirements ITEM DESCRIPTION MIN MAX UNITS Top Operating temperature range 0 50 C Tnon op Non operating temperature range 40 70 26 The power supply must meet UL enclosure requirements for temperature rise limits All sides of the power supply with exception of the air exhaust side must be classified as Handle knobs grips etc held for short periods of time only 5 AC Input Requirements STATUS Required The power supply modules shall incorporate universal power input with active power factor correction which shall reduce line harmonics in accordance with the EN61000 3 2 and JEIDA MITI standards 5 1 AC Inlet Connector STATUS Required The AC input connector shall be an EC 320 C 14 power inlet This inlet is rated for 15 A 250 VAC This connector may be located on the module or on the cage 5 2 Redundant AC
19. eege ete eee een 15 6 1 1 Required Baseboard power COnnector cccococccccnncocccccanoncncnanoncnnnnno cnn cnnnn nn nr nnnn nn nr cnn rra r rn rra rra 15 6 1 2 12V4 Baseboard Power Connechor sae eeeaaeseeeeeseeeessaeeeeaeeseieeesiaees 16 6 1 3 Required Peripheral Power Connectors A 16 6 1 4 Required Floppy Power Connechor nnen 16 6 1 5 Serial ATA Power Connector cde di 17 6 1 6 Server Signal CGonnechor res nrnennnnennrressnrnsssnenennennenn 17 622 Groundingiagaauavaire tert avse atari 18 6 31 Romo SENS Siar reorientar crios ibid 18 6 4 lt Output Power Currents ici A le nea tai 18 6 4 1 Standby Ouitputs aarajntduttsdndvls ET 21 6 4 2 Fan operation in standby mode sianie ariii arie aE ccoo cnn nro nn nr nan enn r rn rra 21 GE Wee Ee UU In EE 21 66 Dynami Loading DEET 22 6 7 Capacitive Loading mrii mairst nae A Bee nd ara a aa en ce 22 6 8 Ripple NOISE huder aa dia 23 DH P dundapnw oiiire gen iins ii ati ek ee g 24 6 10 Hot Swap Heouirements A 24 6 11 Timing Requirements sensia daana nice 25 7 Protection Circuits scii zss iinoa ge eege Eege SEET 28 el UH REH eege ee ed eegene leet 28 ET te e EE 28 7 3 Over Voltage Protection ssiri n iain aa e aa a a a aaa a aaia na MEE 29 7 4 Over Temperature Protectora ale alii eee 29 8 Control and Indicator Functions irradia tido 30 81 PON AAA Add 30 8 2 PWOK PoWe amp FOK uanmeldt A A dit 31 83 SMBus CommuniCation ysis iii a ae ears le Ate a alee E E die raden
20. evels 100 50 and 20 The required minimum efficiency levels are for the purpose of proper power supply cooling when installed in the system The recommended minimum efficiency levels are for the purpose of reducing the system s AC power consumption The efficiency is specified at 50 and 20 loading conditions to help reduce system power consumption at typical system loading conditions Efficiency shall be tested at AC input voltages of 115VAC and 230VAC Refer to www efficientpowersupplies org for details on proper efficiency testing methods Table 4 Efficiency Loading 100 of maximum 50 of maximum 20 of maximum Required minimum 70 72 65 Recommended minimum 80 83 78 5 6 AC Line Dropout STATUS Required An AC line dropout is defined to be when the AC input drops to 0 VAC at any phase of the AC line for any length of time During an AC dropout of one cycle or less the power supply must meet dynamic voltage regulation requirements up to 75 of the rated output load An AC line dropout of one cycle or less shall not cause any tripping of control signals or protection circuits If the AC dropout lasts longer than one cycle or the load is greater than 75 the power supply should recover and meet all turn on requirements The power supply must meet the AC dropout requirement over rated AC voltages frequencies and output loading conditions Any dropout of the 12 SSI ERP2U
21. ignals in the Server System A waveform changes from one level to another in a steady fashion without intermediate retracement or oscillation The periodic or random signals over frequency band of 0 Hz to 20 MHz A condition in which a supply attempts to provide more output current than the amount for which it is rated This commonly occurs if there is a short circuit condition in the load attached to the supply Power Factor Corrected The periodic or random signals over a frequency band of 0 Hz to 20 MHz Rise time is defined as the time it takes any output voltage to rise from 10 to 95 of its nominal voltage The condition where the AC line voltage drops below the nominal voltage conditions The condition where the AC line voltage rises above nominal voltage An output voltage that is present whenever AC power is applied to the AC inputs of the supply Mean time between failure A typical logic level output signal provided by the supply that signals the Server System that all DC output voltages are within their specified range SSI ERP2U Power Supply Design Guide V2 31 4 Mechanical Overview STATUS Required Optional The ERP2U is a power sub system made up of a cage and redundant hot swappable power supply modules A mechanical drawing of the cage is shown below in Figure 1 Two depths are defined to the cage 400mm and 350mm This cage is intended to be mounted in the system and not redundant
22. ional connector which provides serial SMBus for FRU data and remote sense on 3 3V and Return If the Server Signal connector is not present the 3 3V remote sense will be double crimped into one of the 3 3V power contacts in the Baseboard power connector Connector housing 5 pin Molex 50 57 9405 or equivalent Contacts Molex 16 02 0088 or equivalent Table 12 Server Signal Connector Pin Signal 24 AWG Color SSI ERP2U Power Supply Design Guide V2 31 1 SMBus Clock White Green Stripe 2 SMBus Data White Yellow Stripe 3 SMBAlert 4 ReturnS Black White Stripe 5 3 3RS Orange White Stripe 6 2 Grounding STATUS Required The ground of the pins of the power assembly wire harness provides the power return path The wire harness ground pins shall be connected to safety ground power supply enclosure 6 3 Remote Sense STATUS Optional The power assembly may have remote sense for the 3 3V 3 3VS and return ReturnS if the Optional Server Signal connector is implemented and the module has a 3 3V output The remote sense return ReturnS is used to regulate out ground drops for all output voltages The 3 3V remote sense 3 3VS is used to regulate out drops in the system for the 3 3 V output The remote sense input impedance to the power sub assembly must be greater than 200 ohms on 3 3 VS and ReturnS This is the value of the resistor connecting the remote sense to the output voltage internal to th
23. irective and any additional requirements in EC 1000 4 5 1995 and the Level 3 requirements for surge withstand capability with the following conditions and exceptions e These input transients must not cause any out of regulation conditions such as overshoot and undershoot nor must it cause any nuisance trips of any of the power supply protection circuits e The surge withstand test must not produce damage to the power supply e The supply must meet surge withstand test conditions under maximum and minimum DC output load conditions 14 SSI ERP2U Power Supply Design Guide V2 31 6 DC Output Specification These are the output requirements for the power supply assembly including cage and module 6 1 Output Connectors The power supply distribution board shall have one of the two following output connector and wire harness configurations depending upon the type of 12V rail configuration needed by the system 6 1 1 Required Baseboard power connector STATUS Required Connector housing 24 Pin Molex 39 01 2240 or equivalent Contact Molex 44476 1111 or equivalent Table 7 P1 Baseboard Power Connector Pin Signal 18 AWG Color Pin Signal 18 AWG Color 1 3 3 VDC Orange 13 3 3 VDC Orange 2 3 3 VDC Orange 14 12 VDC Blue 3 COM Black 15 COM Black 4 5 VDC Red 16 PS ON Green 5 COM Black 17 COM Black 6 5 VDC Red 18 COM Black 7 COM Black 19 COM Black 8 PWR OK Gray 20 Reserved 5 V in N C ATX 9 5 VSB
24. l be defined as follows Table 32 FRU Device Product Information Area Field Name Manufacturer Name Product Name Product part model number Product Version Product Serial Number Asset Tag Field Description Formal name of manufacturer Manufacturer s model number Customer part number Customer current revision Defined at time of manufacture Not used code is zero length byte 32 SSI ERP2U Power Supply Design Guide V2 31 FRU File ID PAD Bytes Not required Added as necessary to allow for 8 byte offset to next area 8 5 2 2 MultiRecord Area Implement as defined by the IPMI FRU document The following record types shall be used on this power supply e Power Supply Information Record Type 0x00 e DC Output Record Type 0x01 e No other record types are required for the power supply MultiRecord information shall be defined as follows Table 33 FRU Device Product Information Area Field Name PS Info Field Information Definition Overall Capacity watts 480 Peak VA 550 Inrush current A 50 Inrush interval ms 5 Low end input voltage range 1 90 High end input voltage range 1 140 Low end input voltage range 2 180 High end input voltage range 2 264 A C dropout tol ms 20 Binary flags Set for Hot Swap support Autoswitch and PFC Peak Wattage Set for 10 s 550 W Combined wattage Predictive fail tach support Field Name Output Output Information
25. n STATUS Optional The serial bus communication devices for PSMI and FRU data in the power supply shall be compatible with both SMBus 2 0 high power and DC Vag based power and drive This bus shall operate at 3 3V but tolerant of 5V signaling The SMBus pull ups are located on the motherboard and may be connected to 3 3V or 5V Two pins are allocated on the power supply One pin is the Serial Clock PSM Clock The second pin is used for Serial Data PSM Data Both pins are bi directional and are used to form a serial bus The device s in the power supply shall be located at an address s determined by addressing pins AO and A1 on the power supply module The circuits inside the power supply shall derive their power from the 5VSB bus Device s shall be powered from the system side of the 5VSB or ing device No pull up resistors shall be on SCL or SDA inside the power supply These pull up resistors should be located external to the power supply 8 4 Power Supply Management Interface STATUS Optional The PSMI device in the power supply shall derive its power off of the 5VSB output on the system side of the or ing device and grounded to ReturnS It shall be located at an address set by the AO and A1 pins Refer to the PSMI specification posted on the www ssiforum org website for details on the Power Supply Monitoring Interface requirements PSMI is a SMBus interface used to communicate power management information t
26. nn nn naar nn rr naar nn SENEE nr rn naar nnnninnns 31 Table 32 FRU Device IOMA ini ea td dE a td dd hdd ALA ke 32 Table 33 FRU Device Product Information Area 32 SSI ERP2U Power Supply Design Guide V2 31 Table 34 FRU Device Product Information Area 33 Table 35 LED Indicators SSI ERP2U Power Supply Design Guide V2 31 1 Purpose This 2U Rack Power Supply Design Guide defines a common redundant power sub system used in 2U rack mount servers The power sub system is made up of a cage and hot swap redundant power modules This Design Guide covers the mechanical and electrical requirements of this power sub system The requirements of the individual hot swap modules are left open This power sub system may range from 550 to 800 watts and is used in a hot swap redundant configuration The scope of this document defines the requirements for this power assembly The parameters of this supply are defined in this design guide for open industry use 2 Conceptual Overview In the Entry server market the bulk power system must source power on several output rails These rails are typically as follows e 3 3 V optional from bulk supply e 5 V optional from bulk supply e 412V e 12V e DV standby NOTE Local DC DC converters shall be utilized for processor power and will ideally convert power from the 12 V rail however they may also convert power from other rails The bulk power system may be a n 1 redundant power sy
27. no more than the specified maximum input current from Table 3 5 9 AC Line Transient Specification STATUS Recommended AC line transient conditions shall be defined as sag and surge conditions Sag conditions also referred to as brownout conditions will be defined as the AC line voltage dropping below nominal voltage Surge conditions will be defined as the AC line voltage rising above nominal voltage The power supply shall meet the requirements under the following AC line sag and surge conditions Table 5 AC Line Sag Transient Performance AC Line Sag Duration Sag Operating AC Voltage Line Frequency Performance Criteria Continuous 10 Nominal AC Voltage ranges 50 60 Hz No loss of function or performance 0to1AC 100 Nominal AC Voltage ranges 50 60 Hz No loss of function or performance cycle gt 1 AC cycle gt 10 Nominal AC Voltage ranges 50 60 Hz Loss of function acceptable self 13 SSI ERP2U Power Supply Design Guide V2 31 recoverable Table 6 AC Line Surge Transient Performance AC Line Surge Duration Surge Operating AC Voltage Line Frequency Performance Criteria Continuous 10 Nominal AC Voltages 50 60 Hz No loss of function or performance 0 to 2 AC 30 Mid point of nominal AC 50 60 Hz No loss of function or performance cycle Voltages 5 10 AC Line Fast Transient Specification STATUS Recommended The power supply shall meet the EN61000 4 5 d
28. o the system 31 SSI ERP2U Power Supply Design Guide V2 31 PDB addressing AQ A1 0 0 0 1 1 0 1 1 Power supply PSMI device BOh B2h B4h B6h 8 5 Field Replacement Unit FRU Signals STATUS Optional The FRU device in the power supply shall derive its power off of the 5VSB output on the system side of the or ing device and grounded to ReturnS The Write Control or Write protect pin should be tied to ReturnS inside the power supply so that information can be written to the EEPROM PDB addressing AQ A1 0 0 0 1 1 0 1 1 Power supply IPMI FRU device AOh A2h A4h A6h Power supply PSMI device BOh B2h B4h B6h 8 5 1 Module FRU Data FRU data shall be stored starting in address location 8000h through 80FFh The FRU data format shall be compliant with the IPMI specifications The current versions of these specifications are available at http developer intel com design servers ipmi spec htm 8 5 2 Module FRU Data Format The information to be contained in the FRU device is shown in the following table Table 31 FRU Device Information Area Type Common Header Internal Use Area Chassis Info Area Board Info Area Description As defined by the FRU document Not required do not reserve Not applicable do not reserve Not applicable do not reserve 8 5 2 1 Product Info Area Implement as defined by the IPMI FRU document Product information shal
29. ontents 1 PUPPOSC ER EEEE E E E A nad 7 2 Conceptual OVervien neno einean anae eaaa aaa ae aaa eaaa ae aaan aaah Sedaan aaka aaah Feann aaaea ean aeonit meaai 7 3 Definitions Terms ACrOonyMS srwrrnnnnvnnnnnnnvnnnnnnnvnnnnnnnnvnnnnnnnvnnnnnnnvennnnnnvennnnnneennnnnnnennnnnnnennnnnnnennnnnneennnnnnennnnnn 8 4 Mechanical Overview 2 inca 9 4 1 Acoustic Requirements ccccccccccesccceeesseceeeeeseceeeseseceeeseseeeeeseanaeeeeenanceeessseeeeesnsnceeeeseneeeeeseneeeessaneeeensenees 10 4 27 Allow Requir mentsu aug makroen da 10 4 3 Temperature Requirements nnnrnnnvonnnrnnvnnnrnnnvennnnnnvnnnnnnnnvnnnnnnnrnnennnnnnnonansnnnennnnnnnennnnnnnennnnnnnnannnnnnennnnnne 10 5 AC Input RequirementS rmsavnnnnnvnnnvvnnnnvnnnnnvnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnnnnnnnnnnnnnennnnnnnnnnnnnnnnnnnnnnnnn 11 bil AG IN tGConnectoru iia ati 11 5 2 Redundant AC Inlets ou A A dd ess 11 5 3 AC Input Voltage Specification ooonmiccicninnninnin nnnnnncconncnnnnnrccrn cr 11 54 Input Under Voltage ege EEN A bade bebe kar eee bad dd 12 Dior EMCENCV nei rada T 12 5 6 AG Eine Doors sugde buret Grude tas ie 12 Dil AG LING TEE 13 5 8 AG A Eur d De Aer a ee 13 5 9 AC Line Transient Specification renn nrnnnnnvrnrrr renn rr 13 5 10 AC Line Fast Transient Specification rarnvvnnonvrnnnrrnnnnrnnnnnvnrnrrvnnnr rann vennen rennnr ann nnnnennenerrrenannnnsennnnenne 14 6 DG Output Specification EE 15 Gl Output DEET ee Eesen
30. ors Pin Signal 18 AWG Color 1 12V4 Yellow 2 COM Black 3 COM Black 4 5 VDC Red 1 If 240VA limiting is not a requirement for the power supply than all 12V outputs are common and may have the same wire color 6 1 4 Required Floppy Power Connector Connector housing Amp 171822 4 or equivalent Table 10 P9 Floppy Power Connector Pin Signal 22 AWG Color 1 5 VDC Red 2 COM Black 3 COM Black 4 12V4 Yellow 1 The 12V power to peripherals may be split between the second third or fourth 12V channel for the purpose of limiting power to less than 240VA 16 SSI ERP2U Power Supply Design Guide V2 31 2 H 240VA limiting is not a requirement for the power supply than all 12V outputs are common and may have the same wire color 6 1 5 Serial ATA Power Connector STATUS Optional This is a required connector for systems with serial ATA devices The detailed requirements for the serial ATA connector can be found in the Serial ATA High Speed Serialized AT Attachment specification at www serialata org Molex Housing 675820000 Molex Terminal 6751 0000 Table 11 Floppy Power Connector Pin Signal 18 AWG Color 5 3 3VDC Orange 4 COM Black 3 5VDC Red 2 COM Black 1 12V4 Yellow Green Stripe Serial ATA Connector PUA O 6 1 6 Server Signal Connector STATUS Optional For server systems with SMBus features the power supply may have an addit
31. ply shall cause only the power supply s main outputs to shutdown If the power supply latches off due to a protection circuit tripping an AC cycle OFF for 15 s and a PSON cycle HIGH for 1 s must be able to reset the power supply 7 1 Current Limit STATUS Required The power supply shall have current limit to prevent the 3 3 V 5 V and 12 V outputs from exceeding the values shown in Table 27 If the current limits are exceeded the power supply shall shutdown and latch off The latch will be cleared by toggling the PSON signal or by an AC power interruption The power supply shall not be damaged from repeated power cycling in this condition 12 V and 5 VSB shall be protected under over current or shorted conditions so that no damage can occur to the power supply Table 26 Over Current Protection Voltage Over Current Limit lout limit 3 3 V 110 minimum 150 maximum 5V 110 minimum 150 maximum 12V combined Peak combine current minimum 150 maximum 7 2 240VA Protection STATUS Recommended System designs may require user access to energized areas of the system In these cases the power supply may be required to meet regulatory 240VA energy limits for any power rail Since the 12V rail combined power exceeds 240VA it must be divided into separate channels to meet this requirement Each separate rail needs to be limited to less than 20A for each 12V rail The separate 12V rails do no
32. r Temperature Protection STATUS Recommended The power supply will be protected against over temperature conditions caused by loss of fan cooling or excessive ambient temperature In an OTP condition the PSU will shutdown When the power supply temperature drops to within specified limits the power supply shall restore power automatically The OTP circuit must have built in hysteresis such that the power supply will not oscillate on and off due to temperature recovering condition The OTP trip level shall have a minimum of 4 C of ambient temperature hysteresis 29 SSI ERP2U Power Supply Design Guide V2 31 8 Control and Indicator Functions The following sections define the input and output signals from the power supply Signals that can be defined as low true use the following convention signal low true 8 1 PSON STATUS Required The PSON signal is required to remotely turn on off the power supply PSON is an active low signal that turns on the 3 3 V 5 V 12 V and 12 V power rails When this signal is not pulled low by the system or left open the outputs except the 5 VSB and Vbias turn off This signal is pulled to a standby voltage by a pull up resistor internal to the power supply Refer to Figure 4 for timing diagram Table 29 PSON Signal Characteristic Accepts an open collector drain input from the system SCH Pull up to VSB located in power supply PSON Low ON
33. s 5 12V 10 80 12 20 13 20 Vims 10 5 VSB 4 75 5 00 5 25 Vims 5 STATUS Optional Some system applications may require tighter regulation limits on the outputs The optional regulation limits are shown below Table 20 Optional 5V Regulation Limits Parameter MIN 3 3V 3 20 5 V 4 85 12V1 2 3 4 11 64 12V 11 40 5 VSB 4 85 6 6 Dynamic Loading STATUS Required NOM MAX 3 30 3 47 5 00 5 25 12 00 12 60 12 00 13 08 5 00 5 25 Units Vims Vims Vims Vims Vims Tolerance 5 3 5 3 5 3 9 5 5 3 The output voltages shall remain within the limits specified in Error Reference source not found for the step loading and within the limits specified in Table 22 for the capacitive loading specified in below The load transient repetition rate shall be tested between 50 Hz and 5 kHz at duty cycles ranging from 10 90 The load transient repetition rate is only a test specification The A step load may occur anywhere within the MIN load to the MAX load range Table 21 Transient Load Requirements Output 3 3 V 5 V 12V1 12V2 12V3 12V4 5 VSB Step Load Size 30 of max load 30 of max load 65 of max load 25 of max load Load Slew Rate 0 5 A us 0 5 A us 0 5 A us 0 5 A us Capacitive Load 1000 uF 1000 uF 2200 uF 1 uF 6 7 Capacitive Loading STATUS 22 SSI ERP2U Power Supply Design Guide V2
34. s Voltage Minimum Continuous Maximum Continuous Peak 3 3 V7 0 8 A 24 A 5 V 0 5 A 30 A 12V1 OA 16A 18A 12V2 OA 16A 18A 12V3 0 9A 16A 18A 12V4 0 1A 16A 18A 12V OA 0 5A 5 VSB 0 1A 3 0A 35A Maximum continuous total DC output power should not exceed 750 W Maximum continuous combined load on 3 3 VDC and 5 VDC outputs shall not exceed 170 W Maximum Peak total DC output power should not exceed 830 W Peak power and current loading shall be supported for a minimum of 10 second Maximum combined current for the 12 V outputs shall be 60 A Maximum 12V combined peak current shall be 66 A The 3 3V and 5V may be supply by the module or DC DC converters powered from 12V in the cage 20 SSI ERP2U Power Supply Design Guide V2 31 Table 18 800 W Load Ratings Voltage Minimum Continuous Maximum Continuous Peak 3 3 V7 0 8 A 24 A 5 V7 0 5 A 30 A 12V1 0A 16 A 18 A 12V2 0A 16 A 18 A 12V3 0 9 A 16A 18 A 12V4 0 1 A 16 A 18 A 12 V OA 0 5A 5 VSB 0 1A 3 0A 3 5A Maximum continuous total DC output power should not exceed 800 W Maximum continuous combined load on 3 3 VDC and 5 VDC outputs shall not exceed 170 W Maximum Peak total DC output power should not exceed 880 W Peak power and current loading shall be supported for a minimum of 10 second Maximum combined current for the 12 V outputs shall be 64 A Maximum 12V combined peak current shall be 70 A The 3 3V and 5V may be supply by the module or DC DC conver
35. ss Delay from PSON deactive to PWOK being 50 ms deasserted Tpwok on Delay from output voltages within regulation limits 100 500 ms to PWOK asserted at turn on T pwok off Delay from PWOK deasserted to output voltages 1 ms 3 3 V 5 V 12 V 12 V dropping out of regulation limits Tpwok low Duration of PWOK being in the deasserted state 100 ms during an off on cycle using AC or the PSON signal Tsb vout Delay from 5 VSB being in regulation to O Ps 50 1000 ms being in regulation at AC turn on STATUS Recommended Item Description MIN MAX UNITS Tyout_holdup Time all output voltages stay within regulation 21 ms after loss of AC Tpwok_holdup Delay from loss of AC to deassertion of PWOK 20 ms Tsb_holdup Time 5VSB output voltage stays within regulation 70 ms after loss of AC 26 SSI ERP2U Power Supply Design Guide V2 31 AC Inout gt Tvout_holdup Tac_on_delay I Towok_holdup Tpwok low l H l l HE l 3 1 y x T l Tpwok on gt Tpwok_off sb_on_delay L t p PWOK i pak gt d lt Toson_pwok Tsb_holdup Tpson on delay lt AC turn on off cycle gt j e PSON turn on off cycle gt Figure 4 Turn On Off Timing 27 SSI ERP2U Power Supply Design Guide V2 31 7 Protection Circuits STATUS Required Protection circuits inside the power sup
36. stem or a non redundant power system SSI ERP2U Power Supply Design Guide V2 31 3 Definitions Terms Acronyms Required Recommended Optional Autoranging CFM Dropout Latch Off Monotonically Noise Overcurrent PFC Ripple Rise Time Sag Surge VSB or Standby Voltage MTBF PWOK The status given to items within this design guide which are required to meet SSI guidelines and a large majority of system applications The status given to items within this design guide which are not required to meet SSI guidelines however are required by many system applications The status given to items within this design guide which are not required to meet SSI guidelines however some system applications may optionally use these features A power supply that automatically senses and adjusts itself to the proper input voltage range 110 VAC or 220 VAC No manual switches or manual adjustments are needed Cubic Feet per Minute airflow A condition that allows the line voltage input to the power supply to drop to below the minimum operating voltage A power supply after detecting a fault condition shuts itself off Even if the fault condition disappears the supply does not restart unless manual or electronic intervention occurs Manual intervention commonly includes briefly removing and then reconnecting the supply or it could be done through a switch Electronic intervention could be done by electronic s
37. t necessarily need to be independently regulated outputs They can share a common power conversion stage Table 27 Over Current Protection Voltage Over Current Limit lout limit 3 3 V 110 minimum 150 maximum 5 V 110 minimum 150 maximum 12V1 2 3 4 Peak current minimum 20A maximum 1 Peak currents shall be maintained for a minimum of 500msec The maximum duration of the peak current exceeding the 240VA limit should be limited to meet safety regulations A maximum duration of 1 second is recommended 28 SSI ERP2U Power Supply Design Guide V2 31 7 3 Over Voltage Protection STATUS Required The power supply over voltage protection shall be locally sensed in the hot swap modules The power supply shall shutdown and latch off after an over voltage condition occurs This latch shall be cleared by toggling the PSON signal or by an AC power interruption Table 29 contains the over voltage limits The values are measured at the output of the power supply s connectors The voltage shall never exceed the maximum levels when measured at the power pins of the power supply connector during any single point of fail The voltage shall never trip any lower than the minimum levels when measured at the power pins of the power supply connector Table 28 Over Voltage Limits Output Voltage MIN V MAX V 3 3 V 3 9 4 5 5 V 5 7 6 5 12V1 12V2 12V3 12V4 13 3 145 12V 13 3 14 5 5 VSB 5 7 6 5 7 4 Ove
38. ters powered from 12V in the cage NO APRONA 6 4 1 Standby Outputs STATUS Required The 5 VSB output shall be present when an AC input greater than the power supply turn on voltage is applied 6 42 Fan operation in standby mode STATUS Required For standby output at the higher power level when the supply is in standby mode it is required that the power supply fan s remain running at a very low speed This helps prevent power supply overheating when many systems in the same rack are in standby mode Running the fan s in standby mode also allows better cooling to the standby power converter 6 5 Voltage Regulation STATUS Required The power assembly output voltages must stay within the following voltage limits when operating at steady state and dynamic loading conditions These limits include the peak peak ripple noise specified in Section 5 10 All outputs are measured with reference to the return remote sense ReturnS signal The 5 V 12V1 12V2 12V3 12V4 12 V and 5 VSB outputs are measured at the power assembly connectors referenced to ReturnS The 3 3 V is measured at its remote sense signal 3 3VS located at the signal connector 21 SSI ERP2U Power Supply Design Guide V2 31 Table 19 Voltage Regulation Limits Parameter MIN NOM MAX Units Tolerance 3 3 V 3 14 3 30 3 47 Vims 5 5 V 4 75 5 00 5 25 Vims 5 12V1 2 3 4 11 40 12 00 12 60 Vim
39. the voltage rise The 5V output must never be greater than the 3 3V output by more than 2 25 V Each output voltage shall reach regulation within 50 ms Tyout on of each other during turn on of the power supply Each output voltage shall fall out of regulation within 400 ms Tyout off Of each other during turn off Figure 3 and Figure 4 show the turn ON and turn OFF timing requirements In Figure 4 the timing is shown with both AC and PSON controlling the ON OFF of the power supply Table 24 Output Voltage Timing Item Description MIN MAX Units Tvout rise Output voltage rise time from each main output 5 200 ms Toon on All main outputs must be within regulation of each 50 ms other within this time Tvout off All main outputs must leave regulation within this 400 ms time gt Tan rise I lt gt l Tat ep i d Tvout on Figure 3 Output Voltage Timing 25 SSI ERP2U Power Supply Design Guide V2 31 Table 25 Turn On Off Timing Item Description MIN MAX UNITS Tsb on delay Delay from AC being applied to 5 VSB being 1500 ms within regulation T ac on delay Delay from AC being applied to all output voltages 2500 ms being within regulation Tyout_holdup Time all output voltages stay within regulation 18 ms after loss of AC Tpwok_holdup Delay from loss of AC to deassertion of PWOK 17 ms Tpson on delay Delay from PSON active to output voltages within 5 400 ms regulation limits Pa
40. uch a way that incidental pressure on the LED shall not cause it to become displaced 34 SSI ERP2U Power Supply Design Guide V2 31 9 MTBF STATUS Recommended The power module shall have a minimum MTBF at continuous operation of 1 50 000 hours at 100 load and 45 C as calculated by Bellcore RPP or 2 100 000 hours demonstrated at 100 load and 50 C The power cage shall have a minimum MTBF at continuous operation of 1 200 000 hours at 100 load and 45 C as calculated by Bellcore RPP or 2 400 000 hours demonstrated at 100 load and 50 C 10Agency Requirements STATUS Recommended The power supply must comply with all regulatory requirements for its intended geographical market Depending on the chosen market regulatory requirements may vary Although a power supply can be designed for worldwide compliance there may be cost factors that drive different versions of supplies for different geographically targeted markets This specification requires that the power supply meet all regulatory requirements for the intended market at the time of manufacturing Typically this includes e UL e CSA e Nordic CENELEC e TUV e VDE e CISPR Class B e FCC Class B The power supply when installed in the system shall meet immunity requirements specified in EN55024 Specific tests are to be EN61000 4 2 3 4 5 6 8 11 EN61000 3 2 3 and JEIDI MITI standard The power

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