TFX12V Thin Form Factor with 12-Volt Connector Power Supply Design Guide Version 2.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 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.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 Revision History Version Release Date Notes 1.0 April, 2002 • Public release 1.01 May, 2002 • Added dimension in Figure 5 to clarify location of mounting slot feature 1.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 Contents 1 Introduction ..................................................................................................... 7 1.1 1.2 1.3 1.4 TFX12V Scope ............................................................................................................ 7 TFX12V Overview ....................................................................................................... 7 1.2.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 2.4.3 2.4.4 2.4.5 2.4.6 No-load Operation........................................................................................25 Over Current Protection ...............................................................................25 Over-temperature Protection........................................................................25 Output Bypass...........................................................................
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 Figures Figure 1. TFX12V Power Supply ...................................................................................................... 7 Figure 2. Cross Loading Graph for 180W Configuration................................................................. 13 Figure 3. Cross Loading Graph for 220W Configuration................................................................. 14 Figure 4.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 1 Introduction 1.1 TFX12V Scope This document provides design suggestions for a small form factor power supply that is primarily intended for use with small form factor system designs (9-15 liters in total system volume).
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 1.2.2 Improved Acoustics As desktop systems become smaller, they are placed in more exposed areas in the home and work place. The smaller systems are no longer confined to the floor or under the desk, but are placed on the desktop next to the user. In these situations, noise becomes an important factor to the end user.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 1.4 Terminology The following terms are used in this document: Term Description Required The status given to items within this design guide, which are required to meet design guide and a large majority of system applications. Recommended The status given to items within this design guide, which are not required to meet design guide, however, are required by many system applications.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 2 Electrical The following electrical requirements must be met over the environmental ranges as defined in Section 5 (unless otherwise noted). 2.1 AC Input Table 1, lists AC input voltage and frequency requirements for continuous operation. The power supply shall be capable of supplying full-rated output power over two input voltage ranges rated 100-127 VAC and 200240 VAC rms nominal.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 2.1.4 Regulatory The power supply is required to be tested and comply with the most current version of the following regulatory specification requirements and/or standards 2.1.4.1 PRODUCT SAFETY rd UL* 60950, 3 Edition –CAN/CSA-C22.2-60950-00, rd EN*60 950, 3 Edition rd IEC*60 950, 3 Edition (CB Report to include all national deviations) EU* Low Voltage Directive (73/23/EEC) (CE Compliance) GB4943-90 CCIB* (China) 2.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 2.1.5 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 • Earth ground fault (short circuit to ground or chassis enclosure) 2.2 DC Output 2.2.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 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, add-in card slots, and peripheral bays, as well as support for advanced graphics or other features.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 Table 4. Typical Power Distribution for 220 W TFX12V Configurations Output Minimum Current (amps) Rated Current (amps) +12 VDC 1.0 15.0 +5 VDC 0.3 13.0 (Note) +3.3 VDC 0.5 17.0 (Note) -12 VDC 0.0 0.3 +5 VSB 0.0 2.0 Note: Total combined output of 3.3 V and 5 V is Peak Current (amps) 17.0 2.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 Table 5. Typical Power Distribution for 240 W TFX12V Configurations Output Minimum Current (amps) Rated Current (amps) +12 VDC 1.0 16.0 +5 VDC 0.3 18.0 (Note) +3.3 VDC 0.5 17.0 (Note) -12 VDC 0.0 0.3 +5 VSB 0.0 2.0 Note: Total combined output of 3.3 V and 5 V is Peak Current (amps) 18.0 2.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 Table 6: Typical Power Distribution for 270 W SFX12V Configurations Output Peak Current (amps) Maximum Current (amps) Minimum Current (amps) +12 V1DC 1.0 7.0 +12 V2DC 1.0 13.0 +5 VDC 0.3 18.0 +3.3 VDC 0.5 17.0 -12 VDC 0.0 0.3 +5 VSB 0.0 2.0 Note: Total combined output of 3.3 V and 5 V is 9.0 2.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 115VAC input and 230VAC input, under the load conditions defined Table 8, and under the temperature and operating conditions defined in Section 3. The loading condition for testing efficiency shown in Table 7 represents a fully loaded system, a typical (50%) loaded system, and a light (20%) loaded system.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 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 9. Table 9.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 Pow er Sup ply A C H ot A C N eutral V out 10uf V return 0 .1uf Load Load m ust b e isolate d from the groun d of the power su pply. A C G round G enera l Note s: 1. Load the ou tput with its m inim um lo ad curren t. 2. Conn ect the prob es as shown. 3. Repe at the m easurem e nt with m a xim um load o n the o utput. Scope Filter Note: 0.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 2.2.9 Capacitive Load The power supply should be able to power up and operate with the regulation limits defined in Table 2, Section 2.2.1, with the following capacitances simultaneously present on the DC outputs. Table 12. Output Capacitive Loads Output Capacitive Load (PF) +12 V1DC 5,000 +12 V2DC 3,000 +5 VDC 10,000 +3.3 VDC 6,000 -12 VDC 350 +5 VSB 350 2.2.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 2.3 Timing / Housekeeping / Control T1 T5 ~ VAC PS_ON# +12VDC +5VDC +3.3VDC } ~ ~ 95% O/P's 10% T2 ~ T3 PWR_OK T4 T6 timing_3_5_12b PWR_OK Sense Level = 95% of nominal Figure 7. Power Supply Timing Notes: T1 is defined in Section 2.3.4. , T2 in Section 2.3.5. ,T3, T4, T5, and T6 are defined in Table 13.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 2.3.1 PWR_OK PWR_OK is a “power good” signal. This signal should be asserted high by the power supply to indicate that the +12 VDC, +5 VDC, and +3.3 VDC outputs are above the under voltage thresholds listed in Table 2 in Section 2.2.1 and that sufficient mains energy is stored by the converter to guarantee continuous power operation within specification for at least the duration specified in Section 2.2.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 Table 14. PS_ON# Signal Characteristics Parameter Minimum VIL, Input Low Voltage 0.0 V Maximum 0.8 V IIL, Input Low Current (Vin = 0.4 V) -1.6 mA VIH, Input High Voltage (Iin = -200 µA) 2.0 V VIH open circuit, Iin = 0 5.25 V Hysteresis ≥ 0.3 V Disable ≥ 2.0 V PS is disabled ≤ 0.8 V PS is enabled Enable 0.8 2.0 5.25 = Maximum OpenCircuit Voltage PS_ON# Voltage Figure 8. PS_ON# Signal Characteristics 2.3.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 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.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 Table 15. Over Voltage Protection 2.4.2 Output Minimum Nominal Maximum Unit +12 V1DC 13.4 15.0 15.6 Volts +12 V2DC 13.4 15.0 15.6 Volts +5 VDC 5.74 6.3 7.0 Volts +3.3 VDC 3.76 4.2 4.3 Volts 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.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 3 Mechanical 3.1 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 information: manufacturer’s name, part number and lot date code, etc.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 Figure 9.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 Figure 10.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 3.3 Mounting Options The TFX12V mechanical design provides two options for mounting in a system chassis. The unit can be mounted using one of the mounting holes on the front end (non-vented end) or a chassis feature can be designed to engage the slot provided in the bottom of the supply.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 3.4 Chassis Requirements To ensure the power supply can be easily integrated, the following features should be designed into a chassis intended to use a TFX12V power supply: • Chassis cutout (normally in the rear panel of the chassis) as shown in Figure 12.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 3.5 Airflow / Fan The designer’s choice of a power supply cooling solution depends in part on the targeted end-use system application(s). At a minimum, the power supply design must ensure its own reliable and safe operation. Fan location/direction: In general, exhausting air from the system chassis enclosure via a power supply fan is the preferred, most common, and most widely applicable system-level airflow solution.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 3.7 DC Connectors Figure 14 shows pin outs and profiles for typical TFX12V power supply DC harness connectors. The TFX12V requires an additional two-pin, power connector. UL Listed or recognized component appliance wiring material rated min 85 °C, 300 VDC shall be used for all output wiring.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 3.7.1 TFX12V Main Power Connector Connector: MOLEX* 39-01-2240 or equivalent (Mating motherboard connector is Molex 44206-0007 or equivalent) 18 AWG is suggested for all wires except for the +3.3 V supply and sense return wires combined into pin 11 (22 AWG). Pin Signal Color Pin Signal Color 1 +3.3 VDC Orange 13 +3.3 VDC Orange [13] [+3.3 V default sense] [Brown] 2 +3.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 3.7.4 +12 V Power Connector Connector: MOLEX* 39-01-2040 or equivalent (Mating motherboard connector is Molex* 39-29-9042 or equivalent) Pin Signal 18 AWG Wire Pin Signal 18 AWG Wire 1 COM Black 3 +12 V2DC Yellow /Black Stripe 2 COM Black 4 +12 V2DC Yellow /Black Stripe 3.7.5 Serial ATA Power Connector This is an optional connector for systems with Serial ATA devices.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 4 Environmental The following subsections define recommended environmental specifications and test parameters, based on the typical conditions a TFX12V power supply unit may be subjected to during operation or shipment. 4.1 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.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 4.6 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. The area under the PSD curve is 3.13 gRMS. The duration shall be 10 minutes per axis for all three axes on all samples. 4.7 Acoustics Sound Power: The power supply assembly shall not produce a declared sound power level greater than 3.8 BA.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 5 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 company’s Product Safety and Regulations department for more details. 5.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 6 Electromagnetic Compatibility The following subsections outline applicable product regulatory requirements for the TFX12V power supply. Additional requirements may be applied dependent upon the design, product end use (e.g., medical equipment and hazardous locations), target geography, and other variables. 6.
TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0 6.3 Input Line Current Harmonic Content For sales in the EU (European Union) the power supply shall meet the requirements of EN61000-3-2 Class D and the Guidelines for the Suppression of Harmonics in Appliances and General Use Equipment Class D for harmonic line current content at full rated power. See Table 16 for the harmonic limits. Table 16.
TFX12V Power Supply Design Guide Thin Form Factor with 12 V Connector Version 2.0 7 System Cooling Considerations The power supply fan location allows the system designer to utilize the airflow to help cool critical components such as the processor and chipset. Please note that the fan pulls air from the system, instead of blowing hot air in, so components must be placed such that airflow is directed across critical components. Cables, etc must not impede airflow.
