Intel TFX12V Short-circuit Protection, No-load Operation, Over Current Protection, Output Bypass

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Table 15. Over Voltage Protection

Output

Minimum

+12 V1DC

13.4

+12 V2DC

13.4

+5 VDC

5.74

+3.3 VDC

3.76

Nominal

15.0

15.0

6.3

4.2

TFX12V Power Supply Design Guide Thin Form Factor with 12-V Connector Version 2.0

Maximum

Unit

15.6

Volts

15.6

Volts

7.0

Volts

4.3

Volts

2.4.2Short-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. Shorts between main output rails and +5 VSB shall not cause any damage to the power supply. The power supply shall either shut down and latch off or fold back for shorting the negative rails. +5 VSB must be capable of being shorted indefinitely, but when the short is removed, the power supply shall recover automatically or by cycling PS_ON#. The power supply shall be capable of withstanding a continuous short circuit to the output without damage or overstress to the unit (for example, to components, PCB traces, and connectors) under the input conditions specified in Section 3.1.

2.4.3No-load Operation

No damage or hazardous condition should occur with all the DC output connectors disconnected from the load. The power supply may latch into the shutdown state.

2.4.4Over Current Protection

Overload currents applied to each tested output rail cause the output to trip before reaching or exceeding 240 VA. For testing purposes, the overloaded currents should be ramped at a minimum rate of 10 A/s starting from full load.

2.4.5Over-temperature Protection

As an option, the power supply may include an over-temperature protection sensor, which can trip and shut down the power supply at a preset temperature point. Such an overheated condition is typically the result of internal current overloading or a cooling fan failure. If the protection circuit is non-latching, then it should have hysteresis built in to avoid intermittent tripping.

2.4.6Output Bypass

The output return may be connected to the power supply chassis, and will be connected to the system chassis by the system components.

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Contents TFX12V Thin Form Factor with 12-Volt ConnectorImportant Information and Disclaimers Version Release Date Revision HistoryContents Mechanical Figures TFX12V Scope IntroductionTFX12V Overview Small System Optimized ProfileKey Changes for TFX12V Version Term Required Recommended Optional TerminologyMonotonically Noise Description AC Input ElectricalInput Over Current Protection Inrush Current LimitingRegulatory Product SafetyCatastrophic Failure Protection DC OutputDC Voltage Regulation Remote SensingTypical Power Distribution for 180 W TFX12V Configurations Typical Power DistributionCross Loading Graph for 220W Configuration Typical Power Distribution for 220 W TFX12V ConfigurationsCross Loading Graph for 240W Configuration Typical Power Distribution for 240 W TFX12V ConfigurationsTypical Power Distribution for 270 W SFX12V Configurations Power Limit / Hazardous Energy LevelsEfficiency General Loading Table for Efficiency Measurements Efficiency Vs LoadEnergy Star Input Power Consumption Other Low Power System RequirementsOutput Ripple/Noise DC Output Noise/RippleMaximum Step Size Amps Output Transient ResponseCapacitive Load 11 +5 VDC / +3.3 VDC Power SequencingClosed-loop Stability Voltage Hold-up TimeTiming / Housekeeping / Control Power Supply TimingPwrok Pwrok Signal CharacteristicsPSON# PSON# Signal Characteristics Power-on Time3 +5 VSB Output Protection Short-circuit Protection Over-temperature ProtectionNo-load Operation Over Current ProtectionMechanical Physical DimensionsLabeling /Marking Page Power Supply Mounting Slot Detail Mounting Options Suggested TFX12V Chassis Cutout Chassis RequirementsAirflow / Fan AC ConnectorTFX12V Connectors Pin-side view, not to scale DC ConnectorsPeripheral Connectors 1 TFX12V Main Power ConnectorFloppy Drive Connector Serial ATA Power Connector 4 +12 V Power ConnectorEnvironmental Acoustics Random VibrationEcological Requirements North America SafetyInternational Emissions Electromagnetic CompatibilityImmunity Magnetic Leakage Fields Input Line Current Harmonic ContentVoltage Fluctuations and Flicker Harmonic Limits, Class D EquipmentReliability System Cooling ConsiderationsApplicable 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.