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FDS9945
+BOMSMALL SIGNAL FIELD-EFFECT TRANSI
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ManufacturerFairchild Semiconductor
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Mfr. Part #FDS9945
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Datasheet FDS9945 DataSheet
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Package SOIC-8
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In Stock1737
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Specifications
| Attribute | Value |
| Package | Bulk |
| Series | PowerTrench® |
| ProductStatus | Active |
| FETType | 2 N-Channel (Dual) |
| FETFeature | Logic Level Gate |
| DraintoSourceVoltage(Vdss) | 60V |
| Current-ContinuousDrain(Id)@25°C | 3.5A (Ta) |
| RdsOn(Max)@IdVgs | 100mOhm @ 3.5A, 10V |
| Vgs(th)(Max)@Id | 3V @ 250µA |
| GateCharge(Qg)(Max)@Vgs | 13nC @ 5V |
| InputCapacitance(Ciss)(Max)@Vds | 420pF @ 30V |
| Power-Max | 1W (Ta) |
| OperatingTemperature | -55°C ~ 175°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
Overview
Description
The FDS9945 is a type of N-channel power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) commonly used in electronic circuits for switching applications. It is designed for low on-resistance and high-speed switching, making it suitable for power management in various electronic devices. The device typically operates at a voltage range suitable for low to medium power applications, such as DC-DC converters, motor drives, and power supplies.
Key features of the FDS9945 include its low gate charge and low on-state resistance, which contribute to efficient energy use and minimal heat generation in operation. The MOSFET is housed in a surface-mount package, facilitating compact circuit designs and efficient thermal management. It is widely used in consumer electronics, automotive systems, and industrial applications, where reliability and efficiency are crucial.
Overall, the FDS9945 is valued for its performance in handling moderate power levels efficiently, making it a popular choice in a variety of power control and conversion applications.
Key features of the FDS9945 include its low gate charge and low on-state resistance, which contribute to efficient energy use and minimal heat generation in operation. The MOSFET is housed in a surface-mount package, facilitating compact circuit designs and efficient thermal management. It is widely used in consumer electronics, automotive systems, and industrial applications, where reliability and efficiency are crucial.
Overall, the FDS9945 is valued for its performance in handling moderate power levels efficiently, making it a popular choice in a variety of power control and conversion applications.
Equivalent
The FDS9945 is a dual N-channel MOSFET. Equivalent products include the IRF7319 from Infineon, Si4948DY from Vishay, and the DMG3402LSN from Diodes Incorporated. These alternatives have similar specifications, such as voltage and current ratings, and are suitable for similar applications. Always verify the datasheet and compatibility with your specific requirements before substituting.
Features
The FDS9945 is a type of N-channel MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) known for its efficiency in power management applications. Here are its key features:
1. Low On-Resistance: The FDS9945 has low on-resistance, which minimizes power loss and enhances efficiency in switching applications.
2. High Current Capability: It can handle significant current levels, making it suitable for various power applications.
3. Fast Switching Speed: The transistor is designed for rapid switching, which is beneficial in high-frequency applications.
4. Thermal Performance: The device offers good thermal performance, helping to maintain stability and reliability under varying thermal conditions.
5. Compact Package: Typically available in a small form factor, it allows for efficient use of board space.
6. Logic Level Gate Drive: The MOSFET can be driven directly by logic level signals, simplifying its integration into digital circuits.
These features make the FDS9945 suitable for use in DC-DC converters, load switches, and other electronic power control applications.
1. Low On-Resistance: The FDS9945 has low on-resistance, which minimizes power loss and enhances efficiency in switching applications.
2. High Current Capability: It can handle significant current levels, making it suitable for various power applications.
3. Fast Switching Speed: The transistor is designed for rapid switching, which is beneficial in high-frequency applications.
4. Thermal Performance: The device offers good thermal performance, helping to maintain stability and reliability under varying thermal conditions.
5. Compact Package: Typically available in a small form factor, it allows for efficient use of board space.
6. Logic Level Gate Drive: The MOSFET can be driven directly by logic level signals, simplifying its integration into digital circuits.
These features make the FDS9945 suitable for use in DC-DC converters, load switches, and other electronic power control applications.
Pinout
The FDS9945 is a power MOSFET, specifically an N-channel MOSFET, used for various switching and amplification applications. It is housed in a standard 8-pin SOIC (Small Outline Integrated Circuit) package. However, only three of these pins are typically used for its essential functions:
1. Gate (G): This pin is used to control the MOSFET. When a voltage is applied to the gate, it allows current to flow between the drain and source.
2. Drain (D): This pin is where the current flows into the MOSFET. The drain is connected to the load that the MOSFET is controlling.
3. Source (S): This pin is where the current exits the MOSFET. It is usually connected to ground or the negative side of the power supply in an N-channel MOSFET configuration.
The other pins in the package might be internally connected to these main terminals or may not be used. The FDS9945 is known for its low on-resistance and efficient switching capabilities, making it suitable for power management applications.
1. Gate (G): This pin is used to control the MOSFET. When a voltage is applied to the gate, it allows current to flow between the drain and source.
2. Drain (D): This pin is where the current flows into the MOSFET. The drain is connected to the load that the MOSFET is controlling.
3. Source (S): This pin is where the current exits the MOSFET. It is usually connected to ground or the negative side of the power supply in an N-channel MOSFET configuration.
The other pins in the package might be internally connected to these main terminals or may not be used. The FDS9945 is known for its low on-resistance and efficient switching capabilities, making it suitable for power management applications.
Manufacturer
The FDS9945 is a MOSFET (metal-oxide-semiconductor field-effect transistor) manufactured by ON Semiconductor. ON Semiconductor is a company that specializes in the design, production, and marketing of a wide array of semiconductor components. It serves various sectors, including automotive, communications, computing, consumer electronics, industrial, medical, and aerospace, providing essential components for a wide range of electronic applications. The company focuses on energy-efficient innovations and solutions that help reduce global energy use.
Application
The FDS9945 is a dual N-channel MOSFET commonly used in power management and switching applications. Its key application areas include power supplies, DC-DC converters, load switching, and battery management systems. With its low on-resistance and fast switching capabilities, the FDS9945 is suitable for enhancing efficiency in portable electronics, automotive systems, and industrial automation. It is also used in motor control applications and as a protection switch in various electronic circuits. Its compact size and thermal efficiency make it ideal for applications where space and heat dissipation are critical considerations.
Package
The FDS9945 is typically available in an SO-8 package, which is a small-outline package with eight pins.
