`
`
`ATX12V
`Power Supply Design Guide
`
`Version 2.2
`March 2005
`
`
`
`
`
`
`
`
`
`
`
`
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`
`IMPORTANT INFORMATION AND DISCLAIMERS
`INTEL CORPORATION (AND ANY CONTRIBUTOR) IS PROVIDING THIS INFORMATION AS A
`CONVENIENCE AND ACCORDINGLY MAKES NO WARRANTIES WITH REGARD TO THIS
`DOCUMENT OR PRODUCTS MADE IN CONFORMANCE WITH THIS DOCUMENT.
`THIS DOCUMENT IS PROVIDED "AS IS" AND INTEL DISCLAIMS ALL EXPRESS AND IMPLIED
`WARRANTIES, INCLUDING THE WARRANTY OF MERCHANTABILITY AND FITNESS FOR
`PARTICULAR PURPOSE. IN ADDITION, INTEL (AND ANY CONTRIBUTOR) DOES NOT WARRANT
`OR REPRESENT THAT THIS DOCUMENT OR ANY PRODUCTS MADE IN CONFORMANCE WITH IT
`WILL OPERATE IN THE INTENDED MANNER, ARE FREE FROM ERRORS OR DEFECTS, OR ARE
`SAFE FOR USE FOR ITS INTENDED PURPOSE. ANY PERSON USING THIS DOCUMENT OR
`MAKING, USING, OR SELLING PRODUCTS IN CONFORMANCE WITH THIS DOCUMENT DOES SO
`AT HIS OR HER OWN RISK.
`INTEL DISCLAIMS ALL LIABILITY ARISING FROM OR RELATED TO USE OR IMPLEMENTATION OF
`THE INFORMATION PROVIDED IN THIS DOCUMENT, INCLUDING LIABILITY FOR INFRINGEMENT
`OF ANY INTELLECTUAL PROPERTY RIGHTS RELATING TO THE INFORMATION OR THE
`IMPLEMENTATION OF INFORMATION IN THIS DOCUMENT. INTEL DOES NOT WARRANT OR
`REPRESENT THAT SUCH DEVICES OR IMPLEMENTATION WILL NOT INFRINGE SUCH RIGHTS.
`INTEL IS NOT OBLIGATED TO PROVIDE ANY SUPPORT, INSTALLATION OR OTHER ASSISTANCE
`WITH REGARD TO THE INFORMATION OR PRODUCTS MADE IN ACCORDANCE WITH IT. THE
`INFORMATION IN THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE.
`THE INFORMATION REFERRED TO IN THIS DOCUMENT IS INTENDED FOR STANDARD
`COMMERCIAL USE ONLY. CUSTOMERS ARE SOLELY RESPONSIBLE FOR ASSESSING THE
`SUITABILITY OF THE INFORMATION FOR USE IN PARTICULAR APPLICATIONS. THE
`INFORMATION IS NOT INTENDED FOR USE IN CRITICAL CONTROL OR SAFETY SYSTEMS,
`MEDICAL OR LIFE SAVING APPLICATIONS, OR IN NUCLEAR FACILITY APPLICATIONS.
`NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL
`PROPERTY RIGHTS IS GRANTED HEREIN.
`Intel and Pentium are registered trademarks of Intel Corporation or its subsidiaries in the United States
`and other countries.
`Other names and brands may be claimed as the property of others
`Copyright © 2000- 2005 Intel Corporation.
`
`
`- 2 -
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`Revision History
`
`
`Version Release Date
`1.0
`Feb, 2000
`1.1
`Aug, 2000
`
`1.2
`
`Jan, 2002
`
`1.3
`
`April, 2003
`
`2.0
`
`February, 2003
`
`2.01
`
`June, 2004
`
`Notes
`• Public release
`Increase 3.3 V current; add more explanation for power sharing; do
`•
`minor edits and format fixes
`Typical Power Distribution. Change +5V loading on all power
`supplies distribution tables defined in DG to 0.3A
`
`•
`
`• PS_ON# Add text “The power supply should not latch into a
`shutdown state when PS_ON# is driven active by pulses between
`10ms to 100ms during the decay of the power rails.”
`
`• Remove –5V from all power distribution tables.
`
`• Update Power and Current guidance
`• Added efficiency guidance at typical and light load
`Increased min efficiency at full load from 68% to 70%
`•
`• Serial ATA* connector definition added
`• Acoustic levels added for low noise power supply design
`• Reformat and update revision table
`• Update Disclaimers
`• Remove guidelines for ATX
`• Remove guidance for –5V rail
`• Updated guidance for Energy Star and stand by efficiency
`• Added Terminology section
`• Updated power and current guidance
`Includes 250W, 300W, 350W, and 400W guidance
`•
`• Updated cross regulation graphs
`• Updated load tables
`• Updated required efficiency targets. Added recommended
`efficiency targets.
`Increased required minimum efficiency at typical and light load.
`•
`• Main Power Connector changes to 2x12.
`• Aux power connector removed.
`• Required Serial ATA Connector.
`Isolated current limit on 2x2 connector for 12V2 rail.
`•
`• Updated 3.3 V remote sense pin # on the main power connector
`• Updated 12V2 DC Output Noise/Ripple information
`• Removed -5V reference
`• Updated 5Vsb maximum current step
` Modified 115 VAC Frequency for the Voltage Hold-up Time
`•
`
`2.1
`
`March 2005
`
`• Add 450W guidance
`
`
`
`3
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`2.2
`
`March 2005
`
`
`
`• Current requirements updated: 250,300,350,400W
`Load table Updated
`•
`• Cross loading NEED TO UPDATE: from 250W to 450W.
`• Efficiency requirements increased
`3.3.3 5V standby current increased
`•
`• Corrected 12V2 load levels in Tables 3-7
`• Added label to Figure 5
`4.5.1 Added High Current Series wire terminals for ATX Main Power
`•
`Connector
`4.5.2 Added High Current Series wire terminals for +12 V Power
`Connector
`
`•
`
`
`
`- 4 -
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`Contents
`
`1. Introduction ....................................................................................................... 8
`1.1. Scope..................................................................................................................................... 8
`1.2. Key Changes for ATX12V Version 2.0 and later as Compared with ATX and Pervious Versions
`of ATX12V Power Supply ..................................................................................................... 8
`1.2.1. Increased +12 VDC output capability ....................................................................... 8
`1.2.2. Minimum Efficiency................................................................................................... 8
`1.2.2. Main Power Connector: ............................................................................................ 9
`1.2.3. Separate current limit for 12V2 on the 2x2 connector:............................................. 9
`1.3. Terminology........................................................................................................................... 9
`2. Applicable Documents...................................................................................... 10
`3. Electrical ............................................................................................................ 11
`3.1. AC Input................................................................................................................................. 11
`3.1.1. Input Over-current Protection ................................................................................... 11
`3.1.2. Inrush Current Limiting ............................................................................................. 11
`3.1.3. Input Under-voltage .................................................................................................. 12
`3.1.4. Regulatory ................................................................................................................ 12
`3.1.5. Catastrophic Failure Protection ................................................................................ 13
`3.2. DC Output.............................................................................................................................. 13
`3.2.1. DC Voltage Regulation ............................................................................................. 13
`3.2.2. Remote Sensing ....................................................................................................... 13
`3.2.3. Typical Power Distribution ........................................................................................ 13
`3.2.4. Power Limit / Hazardous Energy Levels .................................................................. 20
`3.2.5. Efficiency................................................................................................................... 20
`3.2.6. Output Ripple/Noise.................................................................................................. 22
`3.2.7. Output Transient Response...................................................................................... 24
`3.2.8. Capacitive Load ........................................................................................................ 24
`3.2.9. Closed-loop Stability................................................................................................. 25
`3.2.10. +5 VDC / +3.3 VDC Power Sequencing................................................................. 25
`3.2.11. Voltage Hold-up Time............................................................................................. 25
`3.3. Timing / Housekeeping / Control ........................................................................................... 25
`3.3.1. PWR_OK .................................................................................................................. 26
`3.3.2. PS_ON#.................................................................................................................... 26
`3.3.3. +5 VSB...................................................................................................................... 27
`3.3.4. Power-on Time ......................................................................................................... 28
`3.3.5. Risetime.................................................................................................................... 28
`3.3.6. Overshoot at Turn-on / Turn-off................................................................................ 28
`3.3.7. Reset after Shutdown ............................................................................................... 28
`3.3.8. +5 VSB at AC Power-down ...................................................................................... 28
`3.4. Output Protection................................................................................................................... 29
`3.4.1. Over-voltage Protection............................................................................................ 29
`
`
`
`- 5 -
`
`
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`3.4.2. Short-circuit Protection ............................................................................................. 29
`3.4.3. No-load Operation .................................................................................................... 29
`3.4.4. Over-current Protection ............................................................................................ 29
`3.4.5. Over-temperature Protection .................................................................................... 30
`3.4.6. Output Bypass .......................................................................................................... 30
`4. Mechanical......................................................................................................... 31
`4.1. Labeling / Marking ................................................................................................................. 31
`4.2. Physical Dimensions ............................................................................................................. 31
`4.3. Airflow / Fan........................................................................................................................... 34
`4.4. AC Connector ........................................................................................................................ 35
`4.5. DC Connectors ...................................................................................................................... 35
`4.5.1. ATX Main Power Connector ..................................................................................... 37
`4.5.2. +12 V Power Connector ........................................................................................... 38
`4.5.3. Peripheral Connector(s) ........................................................................................... 38
`4.5.4. Serial ATA Power Connector.................................................................................... 39
`4.5.5. Floppy Drive Connector............................................................................................ 39
`5. Environmental ................................................................................................... 40
`5.1. Temperature .......................................................................................................................... 40
`5.2. Thermal Shock (Shipping)..................................................................................................... 40
`5.3. Humidity................................................................................................................................. 40
`5.4. Altitude................................................................................................................................... 40
`5.5. Mechanical Shock ................................................................................................................. 41
`5.6. Random Vibration.................................................................................................................. 41
`5.7. Acoustics ............................................................................................................................... 41
`6. Electromagnetic Compatibility......................................................................... 42
`6.1. Emissions .............................................................................................................................. 42
`6.2. Immunity .................................................................................................................................. 42
`6.3. Input Line Current Harmonic Content and Line Flicker......................................................... 42
`6.4. Magnetic Leakage Fields ...................................................................................................... 43
`7. Reliability ........................................................................................................... 43
`7.1. Component De-rating ............................................................................................................ 43
`8. Safety ................................................................................................................. 43
`8.1. North America........................................................................................................................ 43
`8.2. International........................................................................................................................... 45
`8.3. Proscribed Materials.............................................................................................................. 45
`
`
`- 6 -
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`Figures
`Figure 1. Cross Loading Graph for 250W Configuration ...................................................................... 15
`Figure 2. Cross Loading Graph for 300W Configuration ...................................................................... 16
`Figure 3. Cross Loading Graph for 350W Configuration ...................................................................... 17
`Figure 4. Cross Loading Graph for 400W Configuration ...................................................................... 18
`Figure 5. Cross Loading Graph for 450W Configuration ...................................................................... 19
`Figure 6. Differential Noise Test Setup................................................................................................. 23
`Figure 7. Power Supply Timing............................................................................................................. 25
`Figure 8. PS_ON# Signal Characteristics............................................................................................. 27
`Figure 9. Power Supply Dimensions for Chassis That Does Not Require Top Venting....................... 32
`Figure 10. Power Supply Dimensions for Chassis That Require Top Venting..................................... 33
`Figure 11. ATX12V Power Supply Connectors..................................................................................... 36
`Figure 12. Serial ATA Connector .......................................................................................................... 39
`
`Tables
`Table 1. AC Input Line Requirements.................................................................................................. 11
`Table 2. DC Output Voltage Regulation .............................................................................................. 13
`Table 3. Typical Power Distribution for a 250 W ATX12V Configuration ............................................ 15
`Table 4. Typical Power Distribution for a 300 W ATX12V Configuration ............................................ 16
`Table 5. Typical Power Distribution for a 350 W ATX12V Configuration ............................................ 17
`Table 6. Typical Power Distribution for a 400 W ATX12V Configuration ............................................ 18
`Table 7. Typical Power Distribution for a 450 W ATX12V Configuration ............................................. 19
`Table 8. Minimum Efficiency Vs Load.................................................................................................. 20
`Table 9. Loading Table for Efficiency Measurements .......................................................................... 21
`Table 10. Energy Star Input Power Consumption ................................................................................ 22
`Table 12. DC Output Noise/Ripple........................................................................................................ 23
`Table 13. DC Output Transient Step Sizes........................................................................................... 24
`Table 14. Output Capacitive Loads....................................................................................................... 24
`Table 15. PWR_OK Signal Characteristics .......................................................................................... 26
`Table 16. PS_ON# Signal Characteristics........................................................................................... 27
`Table 17. Over-voltage Protection ........................................................................................................ 29
`Table 18. Harmonic Limits, Class D Equipment ................................................................................... 42
`
`
`
`- 7 -
`
`
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`1. Introduction
`
`1.1. Scope
`This document provides design suggestions and reference specifications for a family of
`power supplies that comply with the ATX Specification, Version 2.03† for motherboards
`and chassis. It includes supplementary information not expressly detailed in the ATX
`Specification, such as information about the physical form factor of the power supply,
`cooling requirements, connector configuration, and pertinent electrical and signal timing
`specifications.
`This document is provided as a convenience only and is not intended to replace the user’s
`independent design and validation activity. It should not be inferred that all ATX12V
`power supplies must conform exactly to the content of this document. The design specifics
`described herein are not intended to support all possible system configurations. System
`power supply needs vary widely depending on factors such as the application (that is, for
`desktop, workstation, or server), intended ambient environment (temperature, line voltage),
`or motherboard power requirements.
`
`1.2. Key Changes for ATX12V Version 2.0 and later as
`Compared with ATX and Pervious Versions of ATX12V Power
`Supply
`This section briefly summarizes the major changes made to this document that now defines
`ATX12V power supply. With the move to 12V voltage regulators for the processor, ATX
`guidelines for 5V as main power are no longer provided.
`
`1.2.1. Increased +12 VDC output capability
`System components that use 12V are continuing to increase in power. In cases where
`expected current requirements is greater than 18A a second 12 V rail should be made
`available. ATX12V power supplies should be designed to accommodate these increased
`+12 VDC currents.
`
`1.2.2. Minimum Efficiency
`Minimum measured efficiency is required to be 70% at full and 72% at typical (~50%)
`load and 65% at light (~20%) load. The recommended guidance is 77% at full load, 80% at
`typical (50%) load and 75% at light (20%) load to provide direction for future
`requirements.
`
`
`
`
`- 8 -
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`1.2.2. Main Power Connector:
` The 2 x 10 main power connector has been replaced by a 2 x 12 connector. This was made to
`support 75 watt PCI Express*requirements. Pinout assignments are based on the SSI
`recommendation.
`
`With the added 12V, 5V, and 3.3V pins the need for an Aux Power connector is no longer
`needed and the guidance for this connector has been removed.
`
`1.2.3. Separate current limit for 12V2 on the 2x2 connector:
` The 12V rail on the 2 x 2 power connector should be a separate current limited output to meet
`the requirements of UL and EN 60950.
`
`1.3. Terminology
`The following terms are used in this document:
`
`
`
`Term
`
`Required
`
`Recommended
`
`Optional
`
`BA
`
`CFM
`
`Description
`
`The status given to items within this design guide, which are required to meet
`design guide and a large majority of system applications.
`
`The status given to items within this design guide, which are not required to
`meet design guide, however, are required by many system applications.
`
`The status given to items within this design guide, which are not required to
`meet design guide, however, some system applications may optionally use these
`features.
`
`Declared sound power, LwAd. The declared sound power level shall be
`measured according to ISO* 7779 for the power supply and reported according
`to ISO 9296.
`
`Cubic Feet per Minute (airflow).
`
`Monotonically
`
`A waveform changes from one level to another in a steady fashion, without
`intermediate retracement or oscillation.
`
`Noise
`
`The periodic or random signals over frequency band of 0 Hz to 20 MHz.
`
`
`
`2. Applicable Documents
`
`The following documents support this design guide as additional reference material.
`
`
`
`
`- 9 -
`
`
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`Document Title
`FCC Rules Part 15, Class B
`ICES-003: 1997, Class B
`EN 55022: 1998 + Amendment
`A1:2000 Class B
`
`CISPR 22: 1997, Class B
`
`AS/NZS 3548:1995, Class B
`
`EN 55024:1998
`
`IEC 60950, 3rd ed., 1999
`EN 60950: 2000
`UL 60950, 3rd ed., 2000
`CSA 22.2 No. 60950-00
`
`Description
`Title 47, Code of Federal Regulations, Part 15
`Interference-Causing Equipment Standard – Digital Apparatus
`Information Technology Equipment – Radio disturbance characteristics – Limits
`and methods of measurement
`Information Technology Equipment – Radio disturbance characteristics – Limits
`and methods of measurement
`Information Technology Equipment – Radio disturbance characteristics – Limits
`and methods of measurement
`Information Technology Equipment – Immunity Characteristics – Limits and
`methods of measurement
`Safety of Information Technology Equipment
`Safety of Information Technology Equipment
`Safety of Information Technology Equipment
`Safety of Information Technology Equipment
`
`- 10 -
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`3. Electrical
`
`The electrical requirements that follow are to be met over the environmental ranges
`specified in Section 5 unless otherwise noted.
`
`3.1. AC Input
`Table 1 lists AC input voltage and frequency requirements for continuous operation. The
`power supply shall be capable of supplying full-rated output power over two input voltage
`ranges rated 100-127 VAC and 200-240 VAC RMS nominal. The correct input range for
`use in a given environment may be either switch-selectable or auto-ranging. The power
`supply shall automatically recover from AC power loss. The power supply must be able to
`start up under peak loading at 90 VAC.
`Table 1. AC Input Line Requirements
`Maximum
`Parameter
`Minimum
`Nominal+
`135
`Vin (115 VAC)
`90
`115
`265
`Vin (230 VAC)
`180
`230
`63
`Vin Frequency
`47
`--
`+Note: Nominal voltages for test purposes are considered to be within ±1.0 V of nominal.
`
`
`Unit
`VAC rms
`VAC rms
`Hz
`
`3.1.1. Input Over-current Protection
`The power supply shall incorporate primary fusing 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‡.
`
`3.1.2. Inrush Current Limiting
`Maximum inrush current from power-on (with power on at any point on the AC sine) and
`including, but not limited to, three line cycles, shall be limited to a level below the surge
`rating of the input line cord, AC switch if present, bridge rectifier, fuse, and EMI filter
`components. Repetitive ON/OFF cycling of the AC input voltage should not damage the
`power supply or cause the input fuse to blow.
`
`
`‡ . For Denmark and Switzerland international safety requirements, if the internal over-current protective
`devices exceed 8A for Denmark and 10A for Switzerland, then the power supply must pass international
`safety testing to EN 60950 using a maximum 16A over-current protected branch circuit, and this 16A (time
`delay fuse) branch circuit protector must not open during power supply abnormal operation (output short
`circuit and component fault) testing.
`
`
`
`- 11 -
`
`
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`3.1.3. Input Under-voltage
`The power supply shall contain protection circuitry such that the application of an input
`voltage below the minimum specified in Section 3.1, Table 1, shall not cause damage to the
`power supply.
`
`3.1.4. Regulatory
`The power supply is required to be tested and comply with the most current version
`of the following regulatory specification requirements and/or standards
`
`PRODUCT SAFETY
`UL* 60950, 3rd Edition –CAN/CSA-C22.2-60950-00,
`EN*60 950, 3rd Edition
`IEC*60 950, 3rd Edition (CB Report to include all national deviations)
`EU* Low Voltage Directive (73/23/EEC) (CE Compliance)
`GB4943-90 CCIB* (China)
`
`ELECTROMAGNETIC CAMPATIBILITY
`FCC*, Class B, Part 15 (Radiated & Conducted Emissions)
`CISPR* 22 / EN55022, 3rd Edition (Radiated & Conducted Emissions)
`EN55024 (ITE Specific Immunity)
`EN 61000-4-2 – Electrostatic Discharge
`EN 61000-4-3– Radiated RFI Immunity
`EN 61000-4-4– Electrical Fast Transients
`EN 61000-4-5 – Electrical Surge
`EN 61000-4-6 – RF Conducted
`EN 61000-4-8 – Power Frequency Magnetic Fields
`EN 61000-4-11 – Voltage Dips, Short Interrupts and Fluctuations
`EN61000-3-2 (Harmonics)
`EN61000-3-3 (Voltage Flicker)
`EU EMC Directive ((8/9/336/EEC) (CE Compliance)
`
`Other Certifications and/or Declarations
`GB925 (China/CCC*), CNS13438 (Taiwan/BSMI*),
`AS/NZ3548 (Australia/C-tick* based on CISPR22)
`
`- 12 -
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`3.1.5. Catastrophic Failure Protection
`Should a component failure occur, the power supply should not exhibit any of the
`following:
`• Flame
`• Excessive smoke
`• Charred PCB
`• Fused PCB conductor
`• Startling noise
`• Emission of molten material
`
`
`3.2. DC Output
`
`3.2.1. DC Voltage Regulation
`The DC output voltages shall remain within the regulation ranges shown in Table 2 when
`measured at the load end of the output connectors under all line, load, and environmental
`conditions. The voltage regulation limits shall be maintained under continuous operation
`for any steady state temperature and operating conditions specified in Section 5.
`Table 2. DC Output Voltage Regulation
`Max.
`Nom.
`Output
`Range
`Min.
`+12V1DC (1)
`+12.60
`+12.00
`±5%
`+11.40
`+12V2DC (3)
`+12.60
`+12.00
`±5%
`+11.40
`+5.25
`+5.00
`+5VDC
`±5%
`+4.75
`+3.3VDC (2)
`+3.47
`+3.30
`±5%
`+3.14
`-13.20
`-12.00
`-12VDC
`±10%
`-10.80
`+5.25
`+5.00
`+5VSB
`±5%
`+4.75
`(1) At +12 VDC peak loading, regulation at the +12 VDC output can go to ± 10%.
`(2) Voltage tolerance is required at main connector and S-ATA connector (if used).
`(3) Minimum voltage during peak is greater than 11.0 VDC
`
`Unit
`Volts
`Volts
`Volts
`Volts
`Volts
`Volts
`
`3.2.2. Remote Sensing
`The +3.3 VDC output should have provisions for remote sensing to compensate for
`excessive cable drops. The default sense should be connected to pin 13 of the main power
`connector. The power supply should draw no more than 10 mA through the remote sense
`line to keep DC offset voltages to a minimum.
`
`3.2.3. Typical Power Distribution
`DC output power requirements and distributions will vary based on specific system options
`and implementation. Significant dependencies include the quantity and types of
`
`
`
`- 13 -
`
`
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`processors, memory, add-in card slots, and peripheral bays, as well as support for advanced
`graphics or other features. It is ultimately the responsibility of the designer to derive a
`power budget for a given target product and market.
`Table 3 through Table 5 and Figure 1 through Figure 3 provide sample power distributions
`and a graphical recommendation for cross loading. It should not be inferred that all power
`supplies must conform to these tables, nor that a power supply designed to meet the
`information in the tables will work in all system configurations.
`
`- 14 -
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`3.2.3.1. ATX12V Configurations
`
`Table 3. Typical Power Distribution for a 250 W ATX12V Configuration
`
`Peak
`Current
`(amps)
`9
`16.5
`
`
`
`3.5
`
`Note: Total combined output of 3.3 V and 5 V is ≤ 115W
`Peak currents may last up to 17 seconds with not more than one occurrence per minute
`(1)12V1DC and 12V2DC should have separate current limit circuits to meet 240VA safety requirements.
`(2)12V2DC supports processor power requirements and must have a separate current limit and provide 16.5A peak current for
`10 ms; minimum voltage during peak is > 11.0 VDC
`
`
`
`Output
`+12 V1DC(1)
`+12 V2DC(1, 2)
`+5 VDC
`+3.3 VDC
`-12 VDC
`+5 VSB
`
`Min.
`Current
`(amps)
`1
`1
`0.3
`0.5
`0
`0
`
`Max.
`Current
`(amps)
`8
`13
`12
`14
`0.3
`2.5
`
`250W Cross Regulation
`(5V rail + 3.3V rail vs. 12V)
`
`C
`
`Combined Power
`(5V rail + 3.3V rail)
`
`120
`
`100
`
`80
`
`60
`
`40
`
`20
`
`0
`
`5V + 3.3V power (watts)
`
`
`
`
`
`0
`
`50
`
`150
`100
`12V power (watts)
`
`200
`
`250
`
`Figure 1. Cross Loading Graph for 250W Configuration
`
`
`
`
`
`- 15 -
`
`
`
`Netlist Ex 2038
`Samsung v Netlist
`IPR2022-00996
`
`

`

`ATX12V Power Supply Design Guide
`Version 2.2
`
`Table 4. Typical Power Distribution for a 300 W ATX12V Configuration
`
`
`Max.
`Current
`(amps)
`8.0
`13.0
`12.0
`18
`0.3
`2.5
`
`Peak
`Current
`(amps)
`9
`16.5
`
`
`
`3.5
`
`
`
`Output
`+12 V1DC(1)
`+12 V2DC(1, 2)
`+5 VDC
`+3.3 VDC
`-12 VDC
`+5 VSB
`
`Min.
`Current
`(amps)
`1.0
`1.0
`0.3
`0.5
`0.0
`0.0
`
`
`
`
`
`Note: Total combined output of 3.3 V and 5 V is ≤ 120 W
`Peak currents may last up to 17 seconds with not more than one occurrence per minute
`(1)12V1DC and 12V2DC should have separate current limit circuits to meet 240VA safety requirements.
`(2)12V2DC supports processor power requirements and must have a separate current limit and provide 16.5A peak current for
`10 ms; minimum voltage during peak is > 11.0 VDC
`
`300W Cross Regulation
`(5V rail + 3.3V rail vs. 12V1 +12V2)
`
`0
`
`20
`
`40
`
`60
`
`80 100 120 140 160 180 200 220 240 260 280
`12V power (watts)
`
`Combined Power
`(5V rail + 3.3V rail)
`
`
`
`120
`
`100
`
`80
`
`60
`
`40
`
`20
`
`0
`
`5V + 3.3V power (watts)
`
`