SSI
EPS1U Power Supply Design Guide, V1.1
EPS1U
Power Supply Design Guide
A Server System Infrastructure (SSI) Specification
For 1U Rack Chassis Power Supplies
Version 1.1
Страница 1: ...SSI EPS1U Power Supply Design Guide V1 1 EPS1U Power Supply Design Guide A Server System Infrastructure SSI Specification For 1U Rack Chassis Power Supplies Version 1 1...
Страница 2: ...ECIAL DAMAGES 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 includi...
Страница 3: ...C Line Transient Specification 12 5 9 AC Line Fast Transient Specification 12 6 DC Output Specification 13 6 1 Connector 13 6 2 Grounding 15 6 3 Remote Sense 15 6 4 Output Power Currents 15 6 4 1 Stan...
Страница 4: ...Finger Pinout 13 Table 7 125 W Load Ratings 16 Table 8 250 W Load Ratings 16 Table 9 350 W Load Ratings 17 Table 10 Voltage Regulation Limits 18 Table 11 Optional 5V Regulation Limits 18 Table 12 Tra...
Страница 5: ...and provides a wire harness or docking solution for output connections An IEC connector is provided on the external face for AC input to the power supply The power supply contains fans for cooling whi...
Страница 6: ...ervention 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 signal...
Страница 7: ...STATUS Large Power Form Factor The high power edge card form factor is intended for use at 250W and 350W power levels Refer to Figure 1 for details The supply will provide its output power via a card...
Страница 8: ...ut the interior face of the supply Refer to the Entry Electronics Bay Specification at the SSI web site http www ssiforum org docs entry_elecbay_spec_v2_0 pdf for possible output connector configurati...
Страница 9: ...exceed the values shown in Table 2 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 To...
Страница 10: ...W 350W Voltage 110 90 Vrms 100 127 Vrms 140 Vrms 2 4 Arms 1 3 4 2 Arms 1 3 5 9 Arms 1 3 2 2 3 8 5 3Arms 4 Voltage 220 180 Vrms 200 240 Vrms 264 Vrms 1 2 Arms 2 3 2 1 Arms 2 3 3 0 Arms 2 3 1 1 1 9 2 7...
Страница 11: ...ired 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 slo...
Страница 12: ...es 50 60 Hz No loss of function or performance 0 to 1 AC cycle 100 Nominal AC Voltage ranges 50 60 Hz No loss of function or performance 1 AC cycle 10 Nominal AC Voltage ranges 50 60 Hz Loss of functi...
Страница 13: ...vention signal low true Reserved pins are reserved for future use Table 6 Edge Finger Pinout Description Pin Pin Description 12V 1 62 PSON PWOK 2 61 SDA Reserved 3 60 SCL ACWarning 4 59 PSAlert 5VSB 5...
Страница 14: ...3 3V 5V 12V2 12V SDA SCL PSAlert 3 3VS ReturnS Top View of Power Supply Reserved Removed pin NC Reserved Reserved 12V2 GROUND 5V 3 3V Reserved 12V1 12V1 Reserved Reserved Reserved Reserved 51 89 0 05...
Страница 15: ...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 pre...
Страница 16: ...Table 8 250 W Load Ratings Load Range 1 Voltage Minimum Continuous Maximum Continuous Peak 3 3 V 1 5 A 16 A 5 V 1 0 A 12 A 12 V1 1 5 A 16 A See note 2 12 V2 0 5 A 10 A See note 2 12 V 0 A 0 5 A 5 VSB...
Страница 17: ...A 5 V 0 2 A 5 0 A 12 V1 0 2 A 8 0 A 12 V2 0 2 A 2 0 A 5 0 A 12 V 0 A 0 5 A 5 VSB 0 1 A 2 0 A 1 Maximum continuous total DC output power should not exceed 350 W 2 Peak load on the combined 12 V output...
Страница 18: ...Vrms 9 5 5 VSB 4 85 5 00 5 25 Vrms 5 4 STATUS Optional Some system applications may require tighter regulation limits on the 5 V output The optional regulation limits are shown below Table 11 Optional...
Страница 19: ...700 F 12 V 10 11 000 F 12 V 1 350 F 5 VSB 1 350 F 6 8 Ripple Noise STATUS Required The maximum allowed ripple noise output of the power supply is defined in Table 14 below This is measured over a ban...
Страница 20: ...tage shall reach regulation within 50 ms Tvout_on of each other during turn on of the power supply Each output voltage shall fall out of regulation within 400 ms Tvout_off of each other during turn of...
Страница 21: ...ctive to PWOK being deasserted 50 ms Tpwok_on Delay from output voltages within regulation limits to PWOK asserted at turn on 100 1000 ms T pwok_off Delay from PWOK deasserted to output voltages 3 3 V...
Страница 22: ...f Timing Signal Power Supply AC Input Vout PWOK 5VSB PSON Tsb_on_delay TAC_on_delay Tpwok_on Tvout_holdup Tpwok_holdup Tpson_on_delay Tsb_on_delay Tpwok_on Tpwok_off Tpwok_off Tpson_pwok Tpwok_low Tsb...
Страница 23: ...under a shorted output condition Table 17 Over Current Protection Voltage Over Current Limit Iout limit 3 3 V 110 minimum 150 maximum 5 V 110 minimum 150 maximum 12 V 110 minimum 150 maximum 7 2 240VA...
Страница 24: ...r trip any lower than the minimum levels when measured at the power pins of the power supply connector Table 19 Over Voltage Limits Output Voltage MIN V MAX V 3 3 V 3 9 4 5 5 V 5 7 6 5 12 V1 2 13 3 14...
Страница 25: ...t 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 5 for the timing diagram Table 20 PSON Signal Characteristi...
Страница 26: ...o a LOW state See Figure 5 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 2...
Страница 27: ...cs of the ACWarning signal is shown in Table 22 ACWarning Signal Characteristics Refer to Figure 5 for timing diagram Table 22 ACWarning Signal Characteristics Signal Type Open collector drain output...
Страница 28: ...tions is available at http developer intel com design servers ipmi spec htm 8 4 2 FRU Data Format The information to be contained in the FRU device is shown in the following table Table 23 FRU Device...
Страница 29: ...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...
Страница 30: ...Condition Power Supply LED No AC power to PSU or PSU failure OFF AC present Only Standby Output ON BLINK GREEN Power supply DC outputs ON and OK GREEN The LED shall be visible on the power supply s e...
Страница 31: ...cification requires that the power supply meet all regulatory requirements for the intended market at the time of manufacturing Typically this includes UL CSA A Nordic CENELEC TUV VDE CISPR Class B FC...
