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ATX12V PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 ATX12V
기능 Power Supply Design Guide
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ATX12V 데이터시트, 핀배열, 회로
ATX12V
Power Supply Design Guide
Version 2.01
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ATX12V pdf, 반도체, 판매, 대치품
ATX12V Power Supply Design Guide
Contents
1. Introduction ....................................................................................................... 7
1.1. Scope..................................................................................................................................... 7
1.2. Key Changes for ATX12V Version 2.0 as Compared with ATX Power Supply .................... 7
1.2.1. Increased +12 VDC output capability ....................................................................... 7
1.2.2. Minimum Efficiency................................................................................................... 7
1.2.3. Main Power Connector: ............................................................................................ 8
1.2.4. Separate current limit for 12V2 on the 2x2 connector: .............................................. 8
1.3 Terminology ............................................................................................................................ 8
2. Applicable Documents...................................................................................... 9
3. Electrical ............................................................................................................ 10
3.1. AC Input................................................................................................................................. 10
3.1.1. Input Over-current Protection ................................................................................... 10
3.1.2. Inrush Current Limiting ............................................................................................. 10
3.1.3. Input Under-voltage .................................................................................................. 11
3.1.4. Regulatory ................................................................................................................ 11
3.1.5. Catastrophic Failure Protection ................................................................................ 12
3.2. DC Output.............................................................................................................................. 12
3.2.1. DC Voltage Regulation ............................................................................................. 12
3.2.2. Remote Sensing ....................................................................................................... 13
3.2.3. Typical Power Distribution ........................................................................................ 13
3.2.4. Power Limit / Hazardous Energy Levels .................................................................. 18
3.2.5. Efficiency................................................................................................................... 18
3.2.6. Output Ripple/Noise.................................................................................................. 20
3.2.7. Output Transient Response...................................................................................... 22
3.2.8. Capacitive Load ........................................................................................................2 2
3.2.9. Closed-loop Stability ................................................................................................. 23
3.2.10. +5 VDC / +3.3 VDC Power Sequencing ................................................................. 23
3.2.11. Voltage Hold-up Time ............................................................................................. 23
3.3. Timing / Housekeeping / Control ........................................................................................... 23
3.3.1. PWR_OK .................................................................................................................. 24
3.3.2. PS_ON#.................................................................................................................... 24
3.3.3. +5 VSB...................................................................................................................... 25
3.3.4. Power-on Time ......................................................................................................... 26
3.3.5. Risetime .................................................................................................................... 26
3.3.6. Overshoot at Turn-on / Turn-off................................................................................ 26
3.3.7. Reset after Shutdown ............................................................................................... 26
3.3.8. +5 VSB at AC Power-down ...................................................................................... 26
3.4. Output Protection................................................................................................................... 27
3.4.1. Over-voltage Protection ............................................................................................ 27
3.4.2. Short-circuit Protection ............................................................................................. 27
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ATX12V 전자부품, 판매, 대치품
ATX12V Power Supply Design Guide
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 2.03for 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 typical (~50%) load and
60% at light (~20%) load. New recommended guidance has been added to provide
direction for future requirements.
2.03 is the current version of the ATX Specification as of this writing. Future references to the ATX
Specification in this document imply version 2.03 or later, as applicable.
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부품번호상세설명 및 기능제조사
ATX125-3416

110w Platform With PFC

Astec Semiconductor
Astec Semiconductor
ATX12V

Power Supply Design Guide

ETC
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