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ATX / ATX12V Power Supply Design Guide Version 1.2 ATX/ATX12V Power Supply Design Guide Version 1.2 IMPORTANT INFORMATION AND DISCLAIMERS 1. INTEL CORPORATION (AND ANY CONTRIBUTOR) MAKES NO WARRANTIES WITH REGARD TO THIS DOCUMENT AND IN PARTICULAR DOES NOT WARRANT OR REPRESENT THAT THIS DOCUMENT OR ANY PRODUCTS MADE IN CONFORMANCE WITH IT WILL WORK IN THE INTENDED MANNER. NOR DOES INTEL (OR ANY CONTRIBUTOR) ASSUME RESPONSIBILITY FOR ANY ERRORS THAT THE DOCUMENT MAY CONTAIN OR HAVE ANY LIABILITIES OR OBLIGATIONS FOR DAMAGES INCLUDING, BUT NOT LIMITED TO, SPECIAL, INCIDENTAL, INDIRECT, PUNITIVE, OR CONSEQUENTIAL DAMAGES WHETHER ARISING FROM OR IN CONNECTION WITH THE USE OF THIS DOCUMENT IN ANY WAY. 2. NO REPRESENTATIONS OR WARRANTIES ARE MADE THAT ANY PRODUCT BASED IN WHOLE OR IN PART ON THE ABOVE DOCUMENT WILL BE FREE FROM DEFECTS OR SAFE FOR USE FOR ITS INTENDED PURPOSE. ANY PERSON MAKING, USING OR SELLING SUCH PRODUCT DOES SO AT HIS OR HER OWN RISK. 3. THE USER OF THIS DOCUMENT HEREBY EXPRESSLY ACKNOWLEDGES THAT THE DOCUMENT IS PROVIDED AS IS, AND THAT INTEL CORPORATION (AND ANY CONTRIBUTOR) MAKES NO REPRESENTATIONS, EXTENDS NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, ORAL OR WRITTEN, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR WARRANTY OR REPRESENTATION THAT THE DOCUMENT OR ANY PRODUCT OR TECHNOLOGY UTILIZING THE DOCUMENT OR ANY SUBSET OF THE DOCUMENT WILL BE FREE FROM ANY CLAIMS OF INFRINGEMENT OF ANY INTELLECTUAL PROPERTY, INCLUDING PATENTS, COPYRIGHT AND TRADE SECRETS NOR DOES INTEL (OR ANY CONTRIBUTOR) ASSUME ANY OTHER RESPONSIBILITIES WHATSOEVER WITH RESPECT TO THE DOCUMENT OR SUCH PRODUCTS. 4. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED HEREIN. Copyright © 2000 Intel Corporation. All rights reserved. Version 1.1 Third-party brands and names are the property of their respective owners. Revision History Version 1.0 1.1 1.2 Summary of Changes Initial Release Date Feb. 2000 Increase 3.3 V current; add more explanation for power sharing; do minor edits and Aug. 2000 format fixes Section 3.2.3 Typical Power Distribution. Change +5V loading on all power supplies distribution tables defined in DG to 0.3A Section 3.3.2 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." Section 3.2.3.2 Remove ­5V from all power distribution tables. Page 2 ATX/ATX12V Power Supply Design Guide Version 1.2 Contents 1. Introduction... 6 1.1. Scope ... 6 1.2. New for ATX12V as Compared with ATX Power Supply ... 6 1.2.1. ATX12V ...