Intel ATX12V - Manuals - manualsarea.com

Page 2 - IMPORTANT INFORMATION AND DISCLAIMERS; Copyright

ATX12V Power Supply Design Guide Version 2.0 2 IMPORTANT INFORMATION AND DISCLAIMERS INTEL CORPORATION (AND ANY CONTRIBUTOR) IS PROVIDING THIS INFORMATION AS A CONVENIENCE AND ACCORDINGLY MAKES NO W ARRANTIES W ITH REGARD TO THIS DOCUMENT OR PRODUCTS MADE IN CONFORMANCE W ITH THIS DOCUMENT. THIS DOC...

Page 3 - Contents

ATX12V Power Supply Design Guide Version 2.0 3 Contents 1. Introduction ....................................................................................................... 6 1.1. Scope ..................................................................................................................

Page 5 - Figures

ATX12V Power Supply Design Guide Version 2.0 5 Figures Figure 1. Cross Loading Graph for 250W Configuration ....................................................................... 13 Figure 2. Cross Loading Graph for 300W Configuration ...................................................................

Page 6 - for motherboards; is the current version of the

ATX12V Power Supply Design Guide Version 2.0 6 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 n...

Page 7 - The following terms are used in this document:; The periodic or random signals over frequency band of 0 Hz to 20 MHz.

ATX12V Power Supply Design Guide Version 2.0 7 1.2.3. Main Power Connector: The 2 x 10 main power connector has been replaced by a 2 x 12 connector.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 pin...

Page 8 - Applicable Documents; Document Title

ATX12V Power Supply Design Guide Version 2.0 8 2. Applicable Documents The following documents support this design guide as additional reference material. Document Title Description FCC Rules Part 15, Class B Title 47, Code of Federal Regulations, Part 15 ICES-003: 1997, Class B Interference-Causing...

Page 9 - Table 1. AC Input Line Requirements; Parameter Minimum; Frequency

ATX12V Power Supply Design Guide Version 2.0 9 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 ...

Page 10 - PRODUCT SAFETY; Edition; Edition (CB Report to include all national deviations); ELECTROMAGNETIC CAMPATIBILITY; EN 61000-4-8 – Power Frequency Magnetic Fields; Other Certifications and/or Declarations

ATX12V Power Supply Design Guide Version 2.0 10 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 su...

Page 11 - Table 2. DC Output Voltage Regulation; Output Range

ATX12V Power Supply Design Guide Version 2.0 11 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 Out...

Page 13 - Figure 1. Cross Loading Graph for 250W Configuration

ATX12V Power Supply Design Guide Version 2.0 13 3.2.3.1. ATX12V Configurations Table 3. Typical Power Distribution for a 250 W ATX12V Configuration Output Min. Current (amps) Max. Current (amps) Peak Current (amps) +12 V1DC 1 8 10 +12 V2DC 1 14 +5 VDC 0.3 18 +3.3 VDC 0.5 17 -12 VDC 0 0.3 +5 VSB 0 2 ...

Page 14 - Figure 2. Cross Loading Graph for 300W Configuration

ATX12V Power Supply Design Guide Version 2.0 14 Table 4. Typical Power Distribution for a 300 W ATX12V Configuration Output Min. Current (amps) Max. Current (amps) Peak Current (amps) +12 V1DC 1.0 8.0 10.0 +12 V2DC 1.0 14.0 +5 VDC 0.3 20.0 +3.3 VDC 0.5 20.0 -12 VDC 0.0 0.3 +5 VSB 0.0 2.0 2.5 Note: T...

Page 15 - Figure 3. Cross Loading Graph for 350W Configuration

ATX12V Power Supply Design Guide Version 2.0 15 Table 5. Typical Power Distribution for a 350 W ATX12V Configuration Output Min. Current (amps) Max. Current (amps) Peak Current (amps) +12 V1DC 1 10 12 +12 V2DC 1 15 +5 VDC 0.3 21 +3.3 VDC 0.5 22 -12 VDC 0.0 0.3 +5 VSB 0.0 2.0 2.5 Note: Total combined...

Page 16 - Figure 4. Cross Loading Graph for 400W Configuration

ATX12V Power Supply Design Guide Version 2.0 16 Table 6. Typical Power Distribution for a 400 W ATX12V Configuration Output Min. Current (amps) Max. Current (amps) Peak Current (amps) +12 V1DC 1 14 16 +12 V2DC 1 15 +5 VDC 0.3 28 +3.3 VDC 0.5 30 -12 VDC 0 0.3 +5 VSB 0 2 2.5 Note: Total combined outpu...

Page 17 - Table 7. Minimum Efficiency Vs Load

ATX12V Power Supply Design Guide Version 2.0 17 3.2.4. Power Limit / Hazardous Energy Levels Under normal or overload conditions, no output shall continuously provide 240 VA under any conditions of load including output short circuit, per the requirement of UL 1950/CSA 950 / EN 60950/IEC 950. 3.2.5....

Page 18 - Table 8. Loading Table for Efficiency Measurements

ATX12V Power Supply Design Guide Version 2.0 18 Table 8. Loading Table for Efficiency Measurements 250W (loading shown in Amps) Loading +12V1 +12V2 +5V +3.3V -12V +5Vsb Full 4 11.5 6.8 6.5 0.3 1.0 Typical 3 5 3 4 0.1 1.0 Light 2 2.4 0.3 0.5 0.0 1.0 300W (loading shown in Amps) Loading +12V1 +12V2 +5...

Page 19 - Table 9. Energy Star Input Power Consumption; To help meet the Blue Angel

ATX12V Power Supply Design Guide Version 2.0 19 3.2.5.2. Energy Star* The “Energy Star” efficiency requirements of the power supply depend on the intended system configuration. In the low-power / sleep state (S1 or S3) the system should consume power in accordance with the values listed inTable 9. T...

Page 20 - Scope; Figure 5. Differential Noise Test Setup

ATX12V Power Supply Design Guide Version 2.0 20 Table 10. DC Output Noise/Ripple Output Max. Ripple & Noise (mV pp ) +12 V1DC 120 +12 V2DC 200 +5 VDC 50 +3.3 VDC 50 -12 VDC 120 +5 VSB 50 Scope Load V out V return Power Supply AC Hot AC Neutral AC Ground Scope Note: Use Tektronix TDS460 Oscillosc...

Page 21 - Table 11. DC Output Transient Step Sizes; Output; Load-changing repetition rate of 50 Hz to 10 kHz; Table 12. Output Capacitive Loads; Output ATX12V

ATX12V Power Supply Design Guide Version 2.0 21 3.2.7. Output Transient Response Table 11 summarizes the expected output transient step sizes for each output. The transient load slew rate is = 1.0 A/µ s. Table 11. DC Output Transient Step Sizes Output Max. step size (% of rated output amps per Sec 3...

Page 22 - Figure 6. Power Supply Timing

ATX12V Power Supply Design Guide Version 2.0 22 3.2.9. Closed-loop Stability The power supply shall be unconditionally stable under all line/load/transient load conditions including capacitive loads specified in Section 3.2.8. A minimum of 45 degrees phase margin and 10 dB gain margin is recommended...

Page 23 - Table 13. PWR_OK Signal Characteristics

ATX12V Power Supply Design Guide Version 2.0 23 3.3.1. PWR_OK PWR_OK is a “power good” signal. It should be asserted high by the power supply to indicate that the +12 VDC, +5VDC, and +3.3VDC outputs are above the under-voltage thresholds listed in Section 3.2.1 and that sufficient mains energy is st...

Page 25 - The output voltages shall rise from

ATX12V Power Supply Design Guide Version 2.0 25 3.3.4. Power-on Time The power-on time is defined as the time from when PS_ON# is pulled low to when the +12 VDC, +5 VDC, and +3.3 VDC outputs are within the regulation ranges specified in Section 3.2.1. The power-on time shall be less than 500 ms (T 1...

Page 26 - Table 15. Overvoltage Protection; Unit

ATX12V Power Supply Design Guide Version 2.0 26 3.4. Output Protection 3.4.1. Over-voltage Protection The over-voltage sense circuitry and reference shall reside in packages that are separate and distinct from the regulator control circuitry and reference. No single point fault shall be able to caus...

Page 28 - DC output voltages and current ratings

ATX12V Power Supply Design Guide Version 2.0 28 4. Mechanical 4.1. Labeling / Marking The following is a non-inclusive list of suggested markings for each power supply unit. Product regulation stipulations for sale into various geographies may impose additional labeling requirements. • Manufacturer ...

Page 30 - Optional Venting Area

ATX12V Power Supply Design Guide Version 2.0 30 . 53 REF WIRE HARNESS 16 REF 150 REF 20.0(2X) 4.0X6 94.0 11.0 x 5.0 cutouts (4X);min 6.0 clearance undercutout from inside top cover. See Note 5. Area on top surfaceinside dotted lines shouldhave 60% minimum openarea for proper venting.Eight rectangula...

Page 31 - The

ATX12V Power Supply Design Guide Version 2.0 31 4.3. Airflow / Fan The ATX Specification allows for numerous (and often confusing) possibilities for power supply fan location, direction, speed, and venting. The designer’s choice of a power supply cooling solution depends in part on the targeted end-...

Page 32 - NOTE

ATX12V Power Supply Design Guide Version 2.0 32 The ATX Specification offers two options for venting between the power supply and the system interior: • The venting shown in Figure 8 provides the most effective channeled airflow for the power supply itself, with little regard for directly cooling an...

Page 33 - Main Power Connector

ATX12V Power Supply Design Guide Version 2.0 33 Figure 10. ATX12V Power Supply Connectors (Pin-side view, not to scale) 1 1 +3.3 +3.3 +3.3 - 12V CO CO +5V PS_O CO CO +5V CO CO CO PWR_ N +5V +5V +12V +5V +12V +5V +3.3V CO Main Power Connector 1 13 +3.3V +3.3V +3.3V - 12V COM COM +5V PS_ON# COM COM +5...

Page 34 - equivalent; (Mating motherboard connector is Molex 44206-0007 or equivalent)

ATX12V Power Supply Design Guide Version 2.0 34 4.5.1. ATX Main Power Connector Connector: MOLEX* h ousing: 24 Pin Molex Mini-Fit Jr. PN# 39-01-2240 or equivalent (Mating motherboard connector is Molex 44206-0007 or equivalent) 18 AW G is suggested for all wires except for the +3.3 V sense return wi...

Page 36 - This is a required connector for systems with Serial ATA devices.; Wire; Figure 11. Serial ATA Connector; Pin

ATX12V Power Supply Design Guide Version 2.0 36 4.5.4. Serial ATA Power Connector This is a required connector for systems with Serial ATA devices. The detailed requirements for the Serial ATA Power Connector can be found in the “Serial ATA: High Speed Serialized AT Attachment” specification, Sectio...

Page 37 - Operating ambient

ATX12V Power Supply Design Guide Version 2.0 37 5. Environmental The following subsections define recommended environmental specifications and test parameters, based on the typical conditions to which an ATX12V power supply may be subjected during operation or shipment. 5.1. Temperature Operating am...

Page 38 - Guidelines Sound Power:; The power supply assembly shall not produce a declared sound

ATX12V Power Supply Design Guide Version 2.0 Final Review Copy 38 5.5. Mechanical Shock Non-operating 50 g, trapezoidal input; velocity change ≥ 170 in/s Three drops on each of six faces are applied to each sample. 5.6. Random Vibration Non-operating 0.01 g²/Hz at 5 Hz, sloping to 0.02 g²/Hz at 20 H...

Page 39 - Electromagnetic Compatibility

ATX12V Power Supply Design Guide Version 2.0 Final Review Copy 39 6. Electromagnetic Compatibility The following subsections outline sample product regulations requirements for a typical power supply. Actual requirements will depend on the design, product end use, target geography, and other variabl...

Page 40 - Input Line Current Harmonic Content and Line Flicker; Table 16. Harmonic Limits, Class D Equipment

ATX12V Power Supply Design Guide Version 2.0 Final Review Copy 40 6.3. Input Line Current Harmonic Content and Line Flicker For sales in EU (European Union) or Japan the power supply shall meet the requirements of EN61000-3-2 Class D and the Guidelines for the Suppression of Harmonics in Appliances ...

Page 42 - The certification mark shall be marked on each power supply.

ATX12V Power Supply Design Guide Version 2.0 Final Review Copy 42 8. Safety The following subsections outline sample product regulations requirements for a typical power supply. Actual requirements will depend on the design, product end use, target geography, and other variables. Consult your compan...

Page 43 - Cadmium should not be used in painting or plating.

ATX12V Power Supply Design Guide Version 2.0 Final Review Copy 43 8.2. International The vendor must provide a complete CB certificate and test report to IEC 60950: 3rd ed., 1999. The CB report must include ALL CB member country national deviations. CB report must include evaluation to EN 60950: 200...