Intel TFX12V manual Output Protection

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TFX12V Power Supply Design Guide

Thin Form Factor with 12 V Connector

Version 2.0

2.3.5Rise 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.

2.3.6Overshoot at Turn-on / Turn-off

The output voltage overshoot upon the application or removal of the input voltage, or the assertion/de- assertion 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.

2.3.7Reset 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.

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 2.2.12 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

2.4.1Over 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 15.

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Contents Thin Form Factor with 12-Volt Connector TFX12VImportant Information and Disclaimers Revision History Version Release DateContents Mechanical Figures Introduction TFX12V ScopeTFX12V Overview Small System Optimized ProfileKey Changes for TFX12V Version Terminology Term Required Recommended OptionalMonotonically Noise Description Electrical AC InputInput Over Current Protection Inrush Current LimitingProduct Safety RegulatoryDC Output Catastrophic Failure ProtectionDC Voltage Regulation Remote SensingTypical Power Distribution Typical Power Distribution for 180 W TFX12V ConfigurationsTypical Power Distribution for 220 W TFX12V Configurations Cross Loading Graph for 220W ConfigurationTypical Power Distribution for 240 W TFX12V Configurations Cross Loading Graph for 240W ConfigurationPower Limit / Hazardous Energy Levels Typical Power Distribution for 270 W SFX12V ConfigurationsEfficiency General Efficiency Vs Load Loading Table for Efficiency MeasurementsOther Low Power System Requirements Energy Star Input Power ConsumptionOutput Ripple/Noise DC Output Noise/RippleOutput Transient Response Maximum Step Size Amps11 +5 VDC / +3.3 VDC Power Sequencing Capacitive LoadClosed-loop Stability Voltage Hold-up TimePower Supply Timing Timing / Housekeeping / ControlPwrok Signal Characteristics PwrokPSON# Power-on Time PSON# Signal Characteristics3 +5 VSB Output Protection Over-temperature Protection Short-circuit ProtectionNo-load Operation Over Current ProtectionPhysical Dimensions MechanicalLabeling /Marking Page Power Supply Mounting Slot Detail Mounting Options Chassis Requirements Suggested TFX12V Chassis CutoutAC Connector Airflow / FanDC Connectors TFX12V Connectors Pin-side view, not to scale1 TFX12V Main Power Connector Peripheral ConnectorsFloppy Drive Connector 4 +12 V Power Connector Serial ATA Power ConnectorEnvironmental Random Vibration AcousticsEcological Requirements Safety North AmericaInternational Electromagnetic Compatibility EmissionsImmunity Input Line Current Harmonic Content Magnetic Leakage FieldsVoltage Fluctuations and Flicker Harmonic Limits, Class D EquipmentSystem Cooling Considerations ReliabilityApplicable Documents

TFX12V specifications

The Intel TFX12V is a power supply unit (PSU) designed specifically for compact desktop systems, catering to the needs of PC builders who prioritize space-efficient components without compromising on performance. Intel's TFX12V specification defines the form factor and power delivery standards, ensuring compatibility across a wide range of motherboards and peripherals.

One of the main features of the TFX12V is its slimline design. Measuring 85mm in height, 65mm in width, and 150mm in depth, this PSU fits into smaller case designs, making it ideal for compact desktops or media centers. Despite its small size, the TFX12V delivers robust power, typically ranging from 300W to 400W. This output is sufficient for everyday computing tasks, light gaming, and media consumption, allowing users to create space-saving systems without sacrificing functionality.

The TFX12V power supply adheres to the ATX power supply standard, featuring a 24-pin ATX connector, which ensures broad compatibility with modern motherboards. Additionally, the TFX12V includes connections for other crucial components, such as the 4-pin CPU power connector and multiple SATA and PCIe connectors, enabling the build of systems with modern graphics cards and storage solutions.

The efficiency of the TFX12V is another significant aspect. Many models are designed to meet or exceed the 80 PLUS certification, which indicates at least 80% efficiency at 20%, 50%, and 100% loads. High efficiency not only reduces energy consumption but also minimizes heat generation, leading to quieter operation due to lower fan speeds.

In terms of safety and reliability, TFX12V power supplies come equipped with standard protections against over-voltage, under-voltage, and short-circuits. These safety features safeguard the valuable components of a PC from potential power surges or failures.

Furthermore, the product lifecycle of the Intel TFX12V often ensures access to advanced technologies, including pulsating load regulation and enhanced thermal management technologies. These features contribute to a stable power output and improved performance, even under load.

In summary, the Intel TFX12V power supply unit combines compactness, efficiency, and reliability, making it an attractive choice for users looking to build a small form-factor PC without compromising on essential features or quality. With its robust performance and modern technology, it meets the demands of today's computing needs effectively.
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