SSI America EPS2U User's Manual
Contents
1. EMCIONCSY parira a a a E E aaa atea 9 Table 4 AC Line Sag Transient Performance nn cn nnnn nc cnn nan nn cnn nan n nn n naar nn rrnnnnnncnnnnns 11 Table 5 AC Line Surge Transient Performance ooononccccnnoncccccononcncnononcncnnnnnncnn arc cnn canon c rc canon cnc nn anar rr naar nn cr nnnnnnccnnns 11 Table 6 12 Ral Summarys a 12 Table 7 P1 Baseboard Power Connector Common Plane ooocococococcoccccncconnnononcnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnninnnes 13 Table 8 P1 Baseboard Power Connector Split Diane 13 Table 9 Processor Power Connector COMMON Plane ooooocccccccococococonocnnncnnnnnnnononncnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnannnes 14 Table 10 Processor Power Connector Split Plane ooooococcccnnccconocococcccncnccncnnnnnononnnnnnnnnnnnnoncnnnnnnnnnnnnnn cnn nnnnnnannnnes 14 Table 1 1 Peripheral Power Connectors siis ts est cehctediasictibsentecacahd cintia ta lidad 15 Table 12 P9 Floppy Power Connechor tett tt tt tn ASANA EEEEEEENANSEEEEEEAESEEEEEEEEEEESEEEEEEEEEA ESERE EEEn 15 Table To Server Signal ene EEN 16 Table 14 480 W Load Ratings Common Plane ooooonccccnnncccccnnconcccnononncncnononcnnnnnnnnn nano nc cc naar nn cn naar nn cr naar n rr naar nnccnnns 17 Table 19 550 W Load Ratings Split Plade icono tacna ed 17 Table 16 600 W Load Ratings Split Plane cnc TASNA AAAA TEATAR AE AATA 18 Table 17 650 W Load Ratings Split Fiane nn E AE naar nc cnn rr naar nn ccnnnnnnccnnna 18 Table 18 V2. 0 or equivalent Contact Amp 61314 1 contact or equivalent Table 11 Peripheral Power Connectors Pin Signal 18 AWG Color 1 12V2 12V3 or 12V4 Yellow Yellow Blue Stripe or Yellow Green stripe 2 COM Black 3 COM Black 4 5 VDC Red 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 2 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 5 Floppy Power Connector STATUS Required Connector housing Amp 171822 4 or equivalent Table 12 P9 Floppy Power Connector Pin Signal 22 AWG Color 1 5 VDC Red 2 COM Black 3 COM Black 4 12V2 12V3 or 12V4 Yellow Yellow Blue Stripe or Yellow Green stripe 1 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 2 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 6 Server Signal Connector STATUS Optional For server systems with SMBus features the power supply may have an additional connector which provides serial SMBus for FRU data and remote sense on 3 3V and Return 15 SSI EPS2U Power Supply Design Guide V2 1 If the optional server signal connector
3. is not used on the power supply or the connector is unplugged the power supply shall utilize the 3 3RS on the baseboard connector Pin 1 Connector housing 5 pin Molex 50 57 9405 or equivalent Contacts Molex 16 02 0088 or equivalent gold plated Table 13 Server Signal Connector Pin Signal 24 AWG Color 1 DC Clock White Green Stripe 2 12C Data White Yellow Stripe 3 Reserved NA 4 ReturnS Black White Stripe 5 3 3RS Orange White Stripe 6 2 Grounding STATUS Required The ground of the pins of the power supply 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 supply may have remote sense for the 3 3V 3 3VS and return ReturnS if the Optional Server Signal connector is implemented The remote sense return ReturnS is used to regulate out ground drops for all output voltages 3 3V 5 V 12V1 12V2 12V3 12 V and 5 VSB 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 supply must be greater than 200 W on 3 3 VS and ReturnS This is the value of the resistor connecting the remote sense to the output voltage internal to the power supply 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 b
4. power supply shall meet the EN61000 4 5 directive 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 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 The surge withstand test must not produce damage to the power supply The supply must meet surge withstand test conditions under maximum and minimum DC output load conditions 11 SSI EPS2U Power Supply Design Guide V2 1 6 DC Output Specification 6 1 Output Connectors The power supply 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 12V Power Rail Configurations There are two types of 12V rail configurations for systems Common plane and split plane processor power delivery The common plane system has both processors powered from a single 12V rail 12V1 from the power supply The split plane system has both processors powered from separate 12V rails 12V1 and 12V2 one dedicated to each processor The system in both cases has an additional 12V rail to power the rest of the baseboard 12V loads and dc dc converters 12V1 12V2 and 12V3 should not be connected together on the baseboard to ens
5. power supply shall provide a minimum of 12 CFM of airflow with 0 003 inH20 of system backpressure At high fan speed the power supply shall provide a minimum of 20 CFM with 0 006 inH20 of system backpressure 4 2 Temperature Requirements STATUS Recommended The power supply shall operate within all specified limits over the Top temperature range The average air temperature difference AT from the inlet to the outlet of the power supply shall not exceed the values shown below in Table 1 All airflow shall pass through the power supply and not over the exterior surfaces of the power supply Table 1 Thermal Requirements ITEM DESCRIPTION MIN MAX UNITS Top Operating temperature range 0 50 de Tnon op Non operating temperature range 40 70 C 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 SSI EPS2U Power Supply Design Guide V2 1 5 AC Input Requirements STATUS Required The power supply 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 25
6. 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 25 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 25 Over Current Protection Voltage Over Current Limit lout limit 3 3 V 110 minimum 150 maximum 5 V 110 minimum 150 maximum 12V 110 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 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 not necessarily need to be independently regulated outputs They can share a common power conversion stage For common plane systems the 1
7. 0 VAC 5 2 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 Table 2 AC Input Rating PARAMETER MIN RATED MAX Voltage 110 90 Vms 100 127 Vims 140 Vms Voltage 220 180 Vims 200 240 Vims 264 Vims Frequency 47 Hz 63 Hz 5 3 Efficiency STATUS Recommended The following efficiency requirements are provided as a recommendation to allow for proper power supply cooling when installed in a system Table 3 Efficiency Power Level Efficiency Airflow reference 480W 68 20 CFM 550W 68 20 CFM 600W 72 20 CFM 650W 72 20 CFM 9 SSI EPS2U Power Supply Design Guide V2 1 5 4 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 over the rated 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 the power supply should recover and meet all turn on requiremen
8. 000 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 22 SS EPS2U Power Supply Design Guide V2 1 STATUS Recommended Item Description MIN MAX UNITS Tvout_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 AC Inout lt gt Tvout_holdup Tac on delay A Tesch om i i EE gt LS Towok off E Tpwok_off Toson_pwok gt Towok on Ja za eet H S PWOK Baas gt H Tsb_holdup l Ta wot PSON Tpson_on_delay i i i l i i i AC turn on off cycle gt lt PSON turn on off cycle gt Figure 3 Turn On Off Timing Single Power Supply 23 SSI EPS2U Power Supply Design Guide V2 1 7 Protection Circuits STATUS Required Protection circuits inside the power supply shall cause only the power supply s main outputs to shutdown If the power supply latches off due
9. 002 2003 SSI EPS2U Power Supply Design Guide V2 1 Contents 1 PUTDOS O ii ET T E E TTT 5 2 Conceptual Overview 5 3 Definitions Terms ACTONYMS ioiiccociiiicia ii anne 6 4 Mechanical OvervieW 222 7 44 Airflow ReQquIFeMents ta A a 8 4 2 Temperature Requirements s ossessirenstestttrtttttttttt tn tn Anr AeAt t AEAANEOSEEEEEERESEESEEEEAERESEEEEEEEAEEEENEDEEEEEER ESSEE EEEn 8 5 AC Input RequirementS iia aida ada da a ea 9 SCH AG line COpperChOE EE aan 9 5 2 AG Input Voltage Specification att 9 90 EMICIOMCY rial ida 9 SA AC Eine Reie EE 10 A A aaa ere er error 10 107 ell TE ii lia lied italia dd dde dia 10 5 7 AC Line Transient Specification ooooonnincccnnnnicinnnoconccnnnnncnnnnnnnoncnncnnnnnnnnnnnnnnnnnnnnnnnnn nn nn nnnnnnnnnnnnnnnnnnrnnannnes 10 5 8 AC Line Fast Transient Gpechfication nn nn cnn nnnnnnannnnnnnnnrnnnnnnes 11 6 Regele lee E e e ET 12 DCH Qutput Connector iii SS A hi alta te an et its 12 6 1 1 121 Power Rail Configurations arraira nriran a AE EERE EEEIEE EAA EE EEEE ERNES 12 6 1 2 Baseboard power EDD a ratita data 13 6 1 3 Processor Power Connector ccccececececcceceeeeeeeceaeeececeeeeeceaaaaeaeeeceeeeesegeanaeeeeeeeeeseseeaeeeeeeeseesssanaeees 14 6 1 4 Peripheral Power Oppe enee Ee eee aes taste ened EEN 15 6 1 5 Floppy Power Connector ccccccceeeeeecececeeeeeceeeeeaeeececeee cee sgsanaeeeseseeesecaaeaeaeeeeeeesessenaeeeeeeeeeeessanaeees 15 6 1 6 Server Signal Conne
10. 2V rail is divided into either two or three rails For split plane systems the 12V rail is split into four rails Refer to section 6 4 for how the 12V rail is split between different output connectors 24 SSI EPS2U Power Supply Design Guide V2 1 Table 26 Over Current Protection Common Plane Split Plane Voltage Over Current Limit lout limit Over Current Limit lout limit 3 3 V 110 minimum 150 maximum 110 minimum 150 maximum 5 V 110 minimum 150 maximum 110 minimum 150 maximum 12V1 18A minimum 20A maximum 22A peak 15A minimum 20A maximum 12V2 Peak current minimum 20A maximum Peak current minimum 20A maximum 12V3 Peak current minimum 20A maximum 550W only Peak current minimum 20A maximum 12V4 N A Peak current minimum 20A maximum 1 12V1 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 7 3 Over Voltage Protection STATUS Required The power supply over voltage protection shall be locally sensed 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 27 contains the over voltage limits The values are measured at the output of the power supply s connectors The voltage shall never exceed t
11. Loading STATUS Required The power supply shall be stable and meet all 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 21 Capacitve Loading Conditions Output 3 3 V 5 V 12 V 12V 5 VSB MIN 10 10 10 1 1 MAX 12 000 12 000 11 000 350 350 Units uF uF uF uF uF 20 SSI EPS2U Power Supply Design Guide V2 1 6 8 Ripple Noise STATUS Required The maximum allowed ripple noise output of the power supply is defined in Table 22 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 22 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 6 9 Timing Requirements STATUS Required These are the timing requirements for the power supply operation The output voltages must rise from 10 to within regulation limits Tyout rise within 5 to 70 ms 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 the voltage rise The 5V output must never be greater than the 3 3V output by more than 2 25 V Each outp
12. NO WARRANTIES WHATSOEVER INCLUDING ANY WARRANTY OF MERCHANTABILITY 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 I Specification Adopter s Agreement Copyright Intel Corporation Dell Computer Corporation Hewlett Packard Company Silicon Graphics Inc International Business Machines Corporation 2
13. OM MAX Units Tolerance 3 3 V 3 20 3 30 3 46 Vims 5 3 5 V 4 80 5 00 5 25 Vims 5 4 12V1 11 52 12 00 12 60 Vims 5 4 12V2 11 52 12 00 12 60 Vims 5 4 12V3 11 52 12 00 12 60 Vims 5 4 12 V 11 40 12 20 13 08 Vims 9 5 5 VSB 4 85 5 00 5 25 Vims 5 3 STATUS Optional Some system applications may require tighter regulation limits on the 5 V output The optional regulation limits are shown below Table 19 Optional 5V Regulation Limits Parameter MIN NOM MAX Units Tolerance 5 V 4 85 5 00 5 25 Vims 5 3 19 6 6 Dynamic Loading STATUS Required SSI EPS2U Power Supply Design Guide V2 1 The output voltages shall remain within the limits specified in Table 18 for the step loading and within the limits specified in Table 20 for the capacitive loading 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 shown in Table 14 Table 15 Table 16 or Table 17 Table 20 Transient Load Requirements Output 3 3 V 5 V A Step Load Size Load Slew 30 of max load 30 of max load 12V1 12V2 12V3 12V4 65 of max load 5 VSB 25 of max load Rate 0 5 Aus 0 5 Alus 0 5 Alus 0 5 Alus Capacitive Load 1000 uF 1000 uF 2200 uF 1 uF 6 7 Capacitive
14. SSI EPS2U Power Supply Design Guide A Server System Infrastructure SSI Specification For Entry Chassis Power Supplies Revision 2 1 Revision Histor Orig Rev Description of Changes NN Initial release of EPS2U specification Po Updated EPS2U spec with an added 12V 240VA channel updated mounting 4 14 02 features and added gold comment for gold signal contacts Approved EPS2U specification including changes from 4 23 2002 SSI council meeting 4 23 02 2 0 Added output power level recommendations for 550W 600W and 650W power 9 27 02 supplies and updated connector pin outs Modified 12V continuous and peak requirements for 480W power level Updated transient load requirements 240VA requirements and signal description for PWOK Removed temperature rise requirements from thermal section and added efficiency and airflow recommendations for each power level 21 Section 4 2 Changed operating temperature to 45 C from 50 C 5 16 03 Section 6 1 Added 3 3V remote sense to pin 1 of baseboard connector Section 6 1 Changed 12V4 wire color to Yellow Green stripe Added Section 6 1 1 12V Power Rail Configurations Section 6 4 Changed output load rating tables Defined one load range per output level vs two Increased 12V currents for 550 600 amp 650W split plane supplies Section 6 6 Adjusted transient load requirements SSI EPS2U Power Supply Design Guide V2 1 Disclaimer THIS SPECIFICATION IS PROVIDED AS IS WITH
15. 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 3 2 1 Product Info Area Implement as defined by the IPMI FRU document Product information shall be defined as follows Table 31 FRU Device Product Information Area Field Name Manufacturer Name Product Name Product part model number Product Version Product Serial Number Asset Tag FRU File ID PAD Bytes Field Description Formal name of manufacturer Manufacturers model number Customer part number Customer current revision Defined at time of manufacture Not used code is zero length byte Not required Added as necessary to allow for 8 byte offset to next area 28 SSI EPS2U Power Supply Design Guide V2 1 8 3 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 DC Output Record Type 0x01 e No other record types are required for the power supply MultiRecord information shall be defined as follows Table 32 FRU Device Product Information Area Field Name PS Info Overall Capacity watts Peak VA Inrush current A Inrush interval ms Low end input voltage range 1 High end input voltage range 1 Low end input voltage range 2 High end input voltage range 2 A C d
16. at the time of manufacturing Typically this includes e UL e CSA e ANordic 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 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 30
17. ch the input current should be no more than the specified maximum input current from Table 2 5 7 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 10 SS EPS2U Power Supply Design Guide V2 1 Table 4 AC Line Sag Transient Performance Duration Sag Continuous 10 0 to 1AC 100 cycle gt 1 AC cycle gt 10 AC Line Sag Operating AC Voltage Line Frequency Performance Criteria Nominal AC Voltage ranges 50 60 Hz No loss of function or performance Nominal AC Voltage ranges 50 60 Hz No loss of function or performance Nominal AC Voltage ranges 50 60 Hz Loss of function acceptable self recoverable Table 5 AC Line Surge Transient Performance Duration Surge Continuous 10 0 to ZAC 30 cycle AC Line Surge Operating AC Voltage Line Frequency Performance Criteria Nominal AC Voltages 50 60 Hz No loss of function or performance Mid point of nominal AC 50 60 Hz No loss of function or performance Voltages 5 8 AC Line Fast Transient Specification STATUS Recommended The
18. ck 19 COM Black 8 PWR OK Gray 20 Reserved 5 V in ATX N C 9 5 VSB Purple 21 5 VDC Red 10 12 V3 Yellow Blue Stripe 22 5 VDC Red 11 12 V3 Yellow Blue Stripe 23 5 VDC Red 12 3 3 VDC Orange 24 COM Black 1 3 3V remote sense signal double crimped with 3 3V contact 13 SS EPS2U Power Supply Design Guide V2 1 2 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 Processor Power Connector STATUS Required Connector housing 8 Pin Molex 39 01 2080 or equivalent Contact Molex 44476 1111 or equivalent Table 9 Processor Power Connector Common Plane Pin Signal 18 AWG color Pin Signal 18 AWG Color 1 COM Black 5 12 V1 Yellow Black Stripe 2 COM Black 6 12 V1 Yellow Black Stripe 3 COM Black 7 12 V1 Yellow Black Stripe 4 COM Black 8 12 V1 Yellow Black Stripe Table 10 Processor Power Connector Split Plane Pin Signal 18 AWG color Pin Signal 18 AWG Color 1 COM Black 5 12 V1 Yellow Black Stripe 2 COM Black 6 12 V1 Yellow Black Stripe 3 COM Black 7 12 V2 Yellow 4 COM Black 8 12 V2 Yellow 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 14 SSI EPS2U Power Supply Design Guide V2 1 6 1 4 Peripheral Power Connectors STATUS Required Connector housing Amp 1 480424
19. ction iia 15 Ben E O O O A A 16 e EN ler 16 6 4 Output Power Current ccccccccceeceeececececeeeeeeeeeaeaececeeeeeseaaeaeceeeeeeeeseqaaeaeeeeeeeseseeaceeeeeeeesenaaeseeeseeseeeed 17 6 4 1 standby ele 18 6 5 Voltage Regulation oie onie aeeie aa dad dada delia 19 6 6 Dynamic Loading cita Adra 20 6 7 Capacitive LOadiINO womcocinninii a dd added t 20 6 8 Ae le EN GH Timing Requirements a digas anes 21 7 Protection Circuit 24 FA Gument Limit seei ene NN 24 G2 240VA Protections tarraa n aa e a O ta 24 Z Over Voltage Protection cito dd aeiiae ridd cidad did 25 7 4 Over Temperature Protechon anne mnnnnnnnnnnnnannnnnncnnnnnanannes 25 8 Control and Indicator FUNCTIONS REENEN EEN EEN 26 sd Ve EE 26 8 2 PWOK PoWer OK ii A EE Boe eee eee 27 8 3 Field Replacement Unit FRU Signals oonooccnnnnncnnnncccinnnnccccnnnonannnononnn nn nr nnno narran narrar rr rn rr 27 8 3 1 BRU Dita voii eege eene baat deena 27 8 3 2 FRU Data DT EE 28 SSI EPS2U Power Supply Design Guide V2 1 9 rd 30 1 0 Agency E UE E E 30 Figures Figure 1 Enclosure Dra WiN9 ociooiiacii A ENEE 7 Figure 2 Output Voltage Tmmmmmg rire erie Erai AALA SEN ATEEN AAEE AA ia EPIRA ARAT rra 22 Figure 3 Turn On Off Timing Single Power Supp 23 Figure 4 PSON Signal Characteristics ooononcicnnnnnicinnnnccccnnnonccnnn non nc nn nono cnn nono narrar nn 26 Tables Table 1 Thermal Requirements ici A eae eee ee 8 Elek AC MOA RING NEE 9 RABIES
20. e 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 supply s output connector to the remote sense points 16 SS EPS2U Power Supply Design Guide V2 1 6 4 Output Power Currents STATUS Recommended The following tables define the power and current ratings for 480 W 550 W 600 W and 650 W power supplies The combined output power of all outputs shall not exceed the rated output power The power supply must meet both static and dynamic voltage regulation requirements for the minimum loading conditions Table 14 480 W Load Ratings Common Plane Voltage Minimum Continuous Maximum Continuous Peak 3 3 V 0 8 A 24 A 5 V 0 5 A 20 A 12V1 Processors OA 18A 22 AF 12V2 Baseboard 10A 18A 12 V OA 05A 5 VSB 0 1A 20A 1 Maximum continuous total DC output power should not exceed 480 W 2 Maximum continuous combined load on 3 3 VDC and 5 VDC outputs shall not exceed 115 W 3 Maximum Peak total DC output power should not exceed 550 W 4 Peak power and current loading shall be supported for a minimum of 1 second 5 Maximum combined current for the 12 V outputs shall be 32 A 6 Maximum 12V combined peak current shall be 44A 7 Peak 12 V1 current shall be supported for a minimum of 0 5 seco
21. he 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 27 Over Voltage Limits Output Voltage MIN V MAX V 3 3 V 3 9 4 5 5 V 5 7 6 5 12V1 2 3 13 3 14 5 12 V 13 3 14 5 5 VSB 5 7 6 5 7 4 Over 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 25 SS EPS2U Power Supply Design Guide V2 1 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 t
22. his 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 3 for timing diagram Table 28 PSON Signal Characteristic Accepts an open collector drain input from the system Signal Type Pull up to VSB located in power supply PSON Low ON PSON Open or High OFF MIN MAX Logic level low power supply ON OV 1 0 V Logic level high power supply OFF 2 0 V 5 25 V Source current Vpson low 4 mA Power up delay Tpson_on delay D ms 400 ms PWOK delay T pson pwok 50 ms Hysteresis gt 0 3V and or other de bounce method Disabled PS is 9 PS is enabled disabled Enabled OV 1 0V 2 0V 5 25V Figure 4 PSON Signal Characteristics 26 SSI EPS2U Power Supply Design Guide V2 1 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 3 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 cu
23. inimum Continuous Maximum Continuous Peak 3 3 V 0 8A 24A 5 V 0 5A 24A 12V1 OA 12 5A 15A 12V2 OA 12 5A 15A 12V3 0 9A 14A 12V4 0 1A 8 0A 13A 12 V OA 05A 5 VSB 0 1A 20A 1 Maximum continuous total DC output power should not exceed 650 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 770 W 4 Peak power and current loading shall be supported for a minimum of 1 second 5 Maximum combined current for the 12 V outputs shall be 45 A 6 Peak current for the combined 12 V outputs shall be 54 A 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 18 SSI EPS2U Power Supply Design Guide V2 1 6 5 Voltage Regulation STATUS Required The power supply 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 8 All outputs are measured with reference to the return remote sense ReturnS signal The 5 V 12V1 12V2 12V3 12 V and 5 VSB outputs are measured at the power supply connectors referenced to ReturnS The 3 3 V is measured at its remote sense signal 3 3VS located at the signal connector Table 18 Voltage Regulation Limits Parameter MIN N
24. nds Table 15 550 W Load Ratings Split Plane Voltage Minimum Continuous Maximum Continuous Peak 3 3 V 0 8 A 24 A 5 V 0 5 A 20 A 12V1 OA 10 5A 12A 12V2 OA 10 5A 12A 12V3 0 9A 14A 12V4 0 1A 8 0A 13A 12 V OA 05A 5 VSB 0 1A 2 0A 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 1 second 5 Maximum combined current for the 12 V outputs shall be 38 A 6 Peak current for the combined 12 V outputs shall be 45 A 17 SSI EPS2U Power Supply Design Guide V2 1 Table 16 600 W Load Ratings Split Plane Voltage Minimum Continuous Maximum Continuous Peak 3 3 V 0 8 A 24 A 5 V 0 5 A 20 A 12V1 OA 12A 15A 12V2 OA 12A 15A 12V3 0 9A 14A 12V4 0 1A 8 0A 13A 12 V OA 05A 5 VSB 0 1A 20A 1 Maximum continuous total DC output power should not exceed 600 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 710 W 4 Peak power and current loading shall be supported for a minimum of 1 second 5 Maximum combined current for the 12 V outputs shall be 42 A 6 Peak current for the combined 12 V outputs shall be 51 A Table 17 650 W Load Ratings Split Plane Voltage M
25. 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 signals 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 d
26. nts for one supply in this power range The parameters of this supply are defined in this specification for open industry use This specification defines 480W 550W 600W and 650W power supplies with multiple outputs 3 3 V 5 V 12V 12 V and 5 VSB Because of its connector leads the power supply is not intended to be a hot swap type of power supply 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 33V o 5V e 12V e 12V e 5V 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 system or a non redundant power system SSI EPS2U Power Supply Design Guide V2 1 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
27. oltage Regulation LINS aa diia 19 Table 19 Optional 5V Regulation Limits 00 0 0 eee tee e eerie eee cnn nan ERREA 19 Table 20 Transient Load Requirements ccccceceseeeeeceeceeeeeeeseceeeaeeeeeeeeesecceeaaeaeseeeeesececaaeeeseseesecsinaeeeeteneeteee 20 Table 21 Capacitve Loading Condttons ccc nee etnies reine ee eee nn cn nano n cnc nano nn rc nano nn a nn nc naar nn aei 20 Table 22 Ripple and NOISE niaior ae a dt ea aeaa aeai aa 21 Tape 23 Output voltage TIMO DEET 21 Fable 24 Form ONO TI eea A A A E TAAT 22 Table 25 Over Current Protec A A A a aaae E 24 Table 26 Over Current Protection cnn nena nene nn cnn nen nnn anne nn nn nara nnnnnnnnnnnnnnranannnnes 25 Table 2 7 Over Voltage LIMIE eiugegeng steiere iaa dada 25 Table 28 PSON Signal Characteristic alitas 26 Table 29 PWOK Signal Characteristics non AARE ANRE naar Aea aE nn c cnn an RETEK ERARA Ki 27 Table 30 FRU Device Information oooocccnnnnnnnocococnnnnccocnnononnnnnnnnnnnnno nn nnnnn cnn nro enn n nn nn nn nn nana nn nn nnnnnnnnnnnnnnmnnnnnnnnnniannmes 28 Table 31 FRU Device Product Information Area 28 Table 32 FRU Device Product Information Area 29 SSI EPS2U Power Supply Design Guide V2 1 1 Purpose This 2U Rack Power Supply Specification defines a common power supply used in entry level servers This supply may range typically from 400 to 700 watts and is used in a non redundant configuration The scope of this document defines the requireme
28. ropout tol ms Binary flags Peak Wattage Combined wattage Predictive fail tach support Field Name Output Output Information All other output fields Field Information Definition 480 550 50 5 90 140 180 264 20 Set for Hot Swap support Autoswitch and PFC Set for 10 s 550 W 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 29 SSI EPS2U Power Supply Design Guide V2 1 9 MTBF STATUS Recommended The power supply 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 10 Agency 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
29. rops 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 EPS2U Power Supply Design Guide V2 1 4 Mechanical Overview STATUS Required Optional Note Some enclosure features are noted as optional in the drawing below These features may be use in some chassis designs where only top access is allowed for the cage mounting The EPS2U is a power supply enclosure intended to handle a power range of 400W to 700W A mechanical drawing of the power supply cage is shown below in Figure 1 Optional mounting features for top access mounting of the power supply 13 MAXIMUM 45 7 Allow for 1 2mm protrusion x4 am 106 ei 6 32UNC he 6 JEE IEC AC CONNECTOR Figure 1 Enclosure Drawing SSI EPS2U Power Supply Design Guide V2 1 4 1 Airflow Requirements STATUS Recommended The power supply shall have a two speed fan s and provide cooling to both the supply and the system During low speed fan operation the power supply must not exceed a noise level of 43 dBa measured at one meter on all faces At low fan speed the
30. rrent limit Table 29 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 24V 5 25 V PWOK delay Towok on 200 ms 1000 ms PWOK rise and fall time 100 us 1 ms 200 ms Power down delay T pwok off 8 3 Field Replacement Unit FRU Signals STATUS Optional Two pins will be allocated for the FRU information on the power supply connector One pin is the Serial Clock SCL The second pin is used for Serial Data SDA Both pins are bi directional and are used to form a serial bus The FRU circuits inside the power supply must be powered off of 5 VSB output and grounded to ReturnS remote sense return 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 8 3 1 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 27 8 3 2 FRU Data Format SSI EPS2U Power Supply Design Guide V2 1 The information to be contained in the FRU device is shown in the following table Table 30 FRU Device Information Area Type Common Header Internal
31. ts The power supply must meet the AC dropout requirement over rated AC voltages frequencies and output loading conditions Any dropout of the AC line shall not cause damage to the power supply 5 5 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 6 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 for one quarter of the AC cycle after whi
32. ure that 240VA protection circuits in the power supply operate properly Table 6 12V Rail Summary Common Plane System Split Plane System 12V1 Processors 12V1 Processor 1 12V2 Baseboard components other 12V2 Processor 2 than processors 12V3 Drives and peripherals 12V3 Baseboard components other than processors 12V4 Drives and peripherals 12 6 1 2 Baseboard power connector STATUS Required Connector housing 24 Pin Molex 39 01 2240 or equivalent Contact Molex 44476 1111 or equivalent SSI EPS2U Power Supply Design Guide V2 1 Table 7 P1 Baseboard Power Connector Common Plane Pin Signal 18 AWG Color Pin Signal 18 AWG Color 1 3 3 VDC Orange 13 3 3 VDC Orange 3 3RS Orange white stripe 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 ATX N C 9 5 VSB Purple 21 5 VDC Red 10 12 V2 Yellow Blue Stripe 22 5 VDC Red 11 12 V2 Yellow Blue Stripe 23 5 VDC Red 12 3 3 VDC Orange 24 COM Black Table 8 P1 Baseboard Power Connector Split Plane Pin Signal 18 AWG Color Pin Signal 18 AWG Color 1 3 3 VDC Orange 13 3 3 VDC Orange 3 3RS Orange white stripe 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 Bla
33. ut 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 ol Of each other during turn off Figure 2 and Figure 3 show the turn ON and turn OFF timing requirements In Figure 3 the timing is shown with both AC and PSON controlling the ON OFF of the power supply Table 23 Output Voltage Timing Item Description MIN MAX Units Tout rise Output voltage rise time from each main output 5 70 ms Tyout_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 21 SS EPS2U Power Supply Design Guide V2 1 lt gt Tvout_rise lt gt Tat op Tat en Figure 2 Output Voltage Timing Table 24 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 ze on delay Delay from AC being applied to all output voltages 2500 ms being within regulation Tvout_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 T pson_pwok Delay from PSON deactive to PWOK being 50 ms deasserted Tpwok_on Delay from output voltages within regulation limits 100 1
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