User manual ENHANCE LFX12V V1.0

[. . . ] LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector LFX12V Lowprofile Form Factor with 12-Volt Connector Power Supply Design Guide Version 1. 0 Revision History Version Release Date 1. 0 April, 2004 Notes · First public release. 1 LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector 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 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. 10 LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector 2. 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 processors, memory, addin card slots, and peripheral bays, as well as support for advanced graphics or other features. Table 3 through Table 4 and Figure 1 through Figure 2 shows the power distribution and cross loading tables for power supplies in the range of 180 W to 200W. These are recommendations but it is ultimately the responsibility of the designer to define a power budget for a given target product and market. Typical Power Distribution for 180 W Configurations Minimum Current Output +12 VDC +5 VDC +3. 3 VDC -12 VDC +5 VSB (amps) 1. 0 0. 3 0. 5 0 0 Rated Current (amps) 13. 0 8. 0 5. 0 0. 3 2. 0 2. 5 Peak Current (amps) 14. 0 Note: Total combined output of 3. 3 V and 5 V is 50 W Figure 1: Cross Loading Graph for 180W configuration 180W Cross Regulation (5V rail + 3. 3V rail vs. 12V) 60 5V + 3. 3V power (watts) 50 40 30 20 10 0 0 50 100 150 200 Combined Power (5V rail + 3. 3V rail) 12V power (watts) 11 LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector Table 4. Typical Power Distribution for 200 W Configurations Minimum Current Output +12 VDC +5 VDC +3. 3 VDC -12 VDC +5 VSB (amps) 1. 0 0. 3 0. 5 0 0 Rated Current (amps) 13. 5 9. 0 6. 0 0. 3 2. 0 2. 5 Peak Current (amps) 14. 5 Note: Total combined output of 3. 3 V and 5 V is 60 W Figure 2. Cross Loading Graph for 200W Configuration 200W Cross Regulation (5V rail + 3. 3V rail vs. 12V) 70 5V + 3. 3V power (watts) 60 50 40 30 20 10 0 0 50 100 150 200 12V power (watts) Combined Power (5V rail + 3. 3V rail) 12 LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector 2. 2. 4 Power Limit / Hazardous Energy Levels Under normal or overload conditions, it is required that no output shall continuously provide more than 240 VA under any conditions of load including output short circuit, per the requirement of UL 1950/CSA 950 / EN 60950/IEC 950 specification. 2. 2. 5 Efficiency General The power supply should have a required minimum efficiency as stated in Table 5 and when cost effective provide the recommended efficiency in Table 5. The efficiency of the power supply should be tested at nominal input voltage of 115VAC input and 230VAC input, under the load conditions defined in Table 5, and under the temperature and operating conditions defined in Section 3. The loading condition for testing efficiency shown in Table 5 represents a fully loaded system, a 50% loaded system (typical load), and a 20% loaded (light load) system. Efficiency Vs Load Loading Required: Minimum Efficiency Recommended: Minimum Efficiency Full load 70% 75% Typical load 70% 80% Light load 60% 67% Table 6. Loading Tables for Efficiency Measurements 180W (loading shown in Amps) Loading Full Typical Light +12V 11. 0 6. 0 2. 8 +5V 7. 0 3. 0 0. 3 +3. 3V 4. 0 3. 0 0. 5 -12V 0. 2 0. 1 0 +5Vsb 0. 5 0. 5 0. 1 200W (loading shown in Amps) Loading Full Typical Light +12V 11. 5 7. 0 3. 0 +5V 8. 0 3. 0 0. 4 +3. 3V 6. 0 4. 0 0. 5 -12V 0. 2 0. 1 0 +5Vsb 1. 0 1. 0 0. 5 13 LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector 2. 2. 5. 1 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 in Table 7. Energy Star Input Power Consumption Maximum Continuous Power Rating of Power Supply < 200 W > 200 W < 300 W > 300 W < 350 W > 350 W < 400 W > 400 W RMS Watts from the AC Line in Sleep/low-Power Mode < 15 W < 20 W < 25 W < 30 W 10% of the maximum continuous output rating Note: To help meet the "Energy Star" system requirements, it is recommended that the power supply have 50% efficiency at light load and in standby mode. 2. 2. 5. 2 Other Low Power System Requirements To help meet the Blue Angel* system requirements, RAL-UZ 78, US Presidential executive order 13221, future EPA requirements, and other low Power system demands, it recommended that the +5 VSB standby supply efficiency should be as high as possible. Standby efficiency is measured with the main outputs off (PS_ON# high state). Standby efficiency should be greater than 50% with a load of 100mA. 2. 2. 6 Output Ripple/Noise The output ripple/noise requirements listed in 14 LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector Table 8 should be met throughout the load ranges specified in Section 2. 2. 3 and under all input voltage conditions as specified in 2. 1, Table 1. Ripple and noise are defined as periodic or random signals over a frequency band of 10 Hz to 20 MHz. Measurements shall be made with an oscilloscope with 20 MHz of bandwidth. Outputs should be bypassed at the connector with a 0. 1µF ceramic disk capacitor and a 10µF electrolytic capacitor to simulate system loading. See Figure 3. 15 LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector Table 8. [. . . ] Considerations to the previous venting guidelines are: · Openings must be sufficiently designed to meet the safety requirements described in Section 5. The design should always be tested per requirements outlined in Section 2. 1. 4. 2. NOTE: Venting in inappropriate locations can detrimentally allow airflow to bypass those areas where it is needed. 36 LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector 5 Environmental The following subsections define recommended environmental specifications and test parameters, based on the typical conditions the power supply unit may be subjected to during operation or shipment. 5. 1 Temperature Operating ambient: +10 °C to +50 °C (At full load, with a maximum temperature rate of change of 5 °C/10 minutes, but no more than 10 °C/hr. ) Non-operating ambient: -40 °C to +70 °C (Maximum temperature rate of change of 20 °C/hr. ) 5. 2 Thermal Shock (Shipping) Non-operating: -40 °C to +70 °C 15 °C/min dT/dt 30 °C/min. Tested for 50 cycles; Duration of exposure to temperature extremes for each half cycle shall be 30 minutes. 5. 3 Relative Humidity Operating: To 85% relative humidity (non-condensing) Non-operating: To 95% relative humidity (non-condensing) Note: 95% RH is achieved with a dry bulb temperature of 55 °C and a wet bulb temperature of 54 °C. 5. 4 Altitude Requirement Operating: To 10, 000 ft Non-operating: To 50, 000 ft 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. 37 LFX12V Power Supply Design Guide Lowprofile Form Factor with 12-Volt Connector 5. 6 Random Vibration Non-operating: 0. 01 g²/Hz at 5 Hz, sloping to 0. 02 g²/Hz at 20 Hz, and maintaining 0. 02 g²/Hz from 20 Hz to 500 Hz. [. . . ]