User manual ENHANCE TFX12V 1.2

[. . . ] TFX12V Thin Form Factor with 12-Volt Connector Power Supply Design Guide Version 1. 2 Revision History Version Release Date 1. 0 1. 01 1. 2 Apr, 2002 May, 2002 April, 2003 Notes · · · · · · · · · · · · Public release Added dimension in Figure 5 to clarify location of mounting slot feature Updated power and current guidance Added efficiency targets for light and nominal loading Increased minimum Efficiency at full load from 68% to 70% Updated guidance for standby efficiency Added Serial ATA connector Updated Revision his tory table Reformat title page Added cross loading tables Added loading tables for efficiency measurement points Minor modifications to Energy Star TFX12V Power Supply Design Guide Version 1. 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. [. . . ] The DC output enable circuitry must be SELV-compliant. The power supply shall not latch into a shutdown state when PS_ON# is d riven active by pulses between 10ms to 100ms during the decay of the power rails. Table 13. Parameter PS_ON# Signal Characteristics Minimum 0. 0 V 2. 0 V 5. 25 V Maximum 0. 8 V -1. 6 mA VIL, Input Low Voltage IIL, Input Low Current (Vin = 0. 4 V) VIH, Input High Voltage (Iin = -200 µA) VIH open circuit, Iin = 0 Hysteresis 0. 3 V Disable 0. 8 V PS is enabled 2. 0 V PS is disabled Enable 0. 8 2. 0 5. 25 = Maximum OpenCircuit Voltage PS_ON# Voltage Figure 7. PS_ON# Signal Characteristics 20 TFX12V Power Supply Design Guide Version 1. 2 2. 3. 3 +5 VSB +5 VSB is a standby supply output that is active whenever the AC power is present. This output provides a power source for circuits that must remain operational when the five main DC output rails are in a disabled state. Example uses include soft power control, Wake on LAN, wake-on-modem, intrusion detection, or suspend state activities. The +5 VSB output should be capable of delivering a minimum of 2. 0 A. at +5 V ± 5% to external circuits. The power supply must be able to provide the required power during a "wake up" event. If an external USB device generates the event, there may be peak currents as high as 2. 5 A. , lasting no more than 500 ms. Over current protection is required on the +5 VSB output regardless of the output current rating. This ensures the power supply will not be damaged if exte rnal circuits draw more current than the supply can provide. 2. 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 s pecified in Section 2. 2. 1. The power-on time shall be less than 500 ms (T 1 < 500 ms). +5 VSB shall have a power-on time of two seconds maximum after application of valid AC voltages. 2. 3. 5 Rise Time The output voltages shall rise from 10% of nominal to within the regulation ranges specified in Section 2. 2. 1 within 0. 2 ms to 20 ms (0. 2 ms T2 20 ms). There must be a smooth and continuous ramp of each DC output voltage from 10% to 90% of its final set point within the regulation band, while loaded as specified in Section 2. 2. 1. The smooth turn-on requires that, during the 10% to 90% portion of the rise time, the slope of the turn-on waveform must be positive and have a value of between 0 V/ms and [Vout, nominal / 0. 1] V/ms. Also, for any 5 ms segment of the 10% to 90% rise time waveform, a straight line drawn between the end points of the waveform segment must have a slope [Vout, nominal / 20] V/ms. 2. 3. 6 Overshoot at Turn-on / Turn-off The output voltage overshoot upon the application or removal of the input voltage, or the assertion/deassertion of PS_ON#, under the conditions specified in Section 3. 1, shall be less than 10% above the nominal voltage. No voltage of opposite polarity shall be present on any output during turn-on or turn-off. 2. 3. 7 Reset after Shutdown If the power supply latches into a shutdown state because of a fault condition on its outputs, the power supply shall return to normal operation only after the fault has been removed and the PS_ON# has been cycled OFF/ON with a minimum OFF time of one second. 21 TFX12V Power Supply Design Guide Version 1. 2 2. 3. 8 +5 VSB at AC Power-down After AC power is removed, the +5 VSB standby voltage output should remain at its steady state value for the minimum hold-up time specified in Section 2. 2. 11 until the output begins to decrease in voltage. The decrease shall be monotonic in nature, dropping to 0. 0 V. There shall be no other disturbances of this voltage at or following removal of AC power. 2. 4 Output Protection 2. 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 cause a sustained over voltage condition on any or all outputs. The supply shall provide latch-mode over voltage protection as defined in Table 14. Table 14. Output +12 VDC +5 VDC +3. 3 VDC Over Voltage Protection Minimum 13. 4 5. 74 3. 76 Nominal 15. 0 6. 3 4. 2 Maximum 15. 6 7. 0 4. 3 Unit Volts Volts Volts 2. 4. 2 Short-circuit Protection An output short circuit is defined as any output impedance of less than 0. 1 ohms. The power supply shall shut down and latch off for shorting the +3. 3 VDC, +5 VDC, or +12 VDC rails to return or any other rail. [. . . ] Actual requirements will depend on the design, product end use, target geography, and other variables. Consult your company's Product Safety and Regulations department for more details. 5. 1 North America The power supply must be certified by an NRTL (Nationally Recognized Testing Laboratory) for use in the USA and Canada under the following conditions: · The supply must be recognized for use in Information Technology Equipment including Electrical Business Equipment per UL 60950, 3rd edition, 2000. The certification must include external enclosure testing for the AC receptacle side of the power supply. The supply must have a full complement of tests conducted as part of the certification, such as input current, leakage current, hi-pot, temperature, energy discharge test, transformer output characterization test (open-circuit voltage, short-circuit current, and maximum VA output), and abnormal testing (to include stalled-fan tests and voltage-select­switch mismatch). [. . . ]