Infineon AUIRFR9024NTRL N-Channel Power MOSFET: Datasheet, Application Circuit, and Replacement Guide
The Infineon AUIRFR9024NTRL is a robust N-channel power MOSFET engineered for high-performance switching applications. Leveraging Infineon's advanced process technology, this component is a popular choice for designers seeking efficiency, reliability, and thermal stability in demanding environments. This article provides a detailed look at its key specifications, a typical application circuit, and guidance for finding a suitable replacement.
Datasheet Overview and Key Specifications
The AUIRFR9024NTRL is housed in a compact and efficient TO-252 (DPAK) package, making it suitable for space-constrained PCB designs. Its primary electrical characteristics define its capabilities:
Drain-Source Voltage (Vds): 55 V. This rating makes it ideal for applications like automotive systems (e.g., powertrain, lighting), 48V telecom systems, and DC-DC converters.
Continuous Drain Current (Id): 96 A at a case temperature of 25°C. This high current handling capability is central to its use in high-power circuits.
On-Resistance (Rds(on)): A remarkably low 2.7 mΩ (max) at 10 V gate drive. This low resistance is crucial for minimizing conduction losses and improving overall system efficiency, as it reduces heat generation during operation.
Gate Threshold Voltage (Vgs(th)): Typically 2.35 V, with a maximum gate-source voltage (Vgs) of ±20 V. This standard threshold allows for easy drive compatibility with a wide range of logic-level and standard PWM controllers.
Typical Application Circuit
A common application for the AUIRFR9024NTRL is in a synchronous buck converter, a topology widely used for voltage step-down in power supplies. In such a circuit, the AUIRFR9024NTRL would typically be used as the low-side (synchronous) MOSFET.
1. The high-side MOSFET switches, connecting the input voltage to the inductor.
2. When the high-side switch turns off, the AUIRFR9024NTRL (low-side) is turned on by the controller, providing a path for the inductor current to circulate with a very low voltage drop (due to its low Rds(on)).
3. This switching action efficiently charges and discharges the inductor, regulating the output voltage.
Critical external components include:
Gate Driver IC: Essential for providing strong, fast switching signals to rapidly turn the MOSFET on and off, minimizing switching losses.
Bootstrap Capacitor: Powers the high-side gate driver circuitry.
Output Inductor and Capacitors: Filter the switched waveform to create a stable DC output.
Proper PCB layout is paramount, especially for a MOSFET with such high switching speeds and current. Minimizing parasitic inductance in the power loop and ensuring a low-impedance gate drive path are critical for stable performance and preventing oscillations.
Replacement Guide
When the AUIRFR9024NTRL is unavailable, selecting a suitable replacement requires careful cross-referencing of key parameters to ensure compatibility and performance.
1. Package Compatibility: The replacement must be in a TO-252 (DPAK) or equivalent package for mechanical and footprint compatibility.
2. Electrical Characteristics: The replacement must meet or exceed the critical specs:
Vds must be at least 55V.
Continuous current rating should be similar or higher.
Rds(on) must be equally low to maintain efficiency. A higher Rds(on) will lead to increased heat generation.
Gate charge (Qg) should be comparable to ensure the existing gate driver can still switch the device effectively.
3. Potential Replacements: Always consult the latest manufacturer cross-reference lists. Competitors like Vishay, STMicroelectronics, and ON Semiconductor offer parts in this class. For example, a part like the STP110N4F6 (with similar Vds and Rds(on)) might be considered, but a full datasheet comparison is mandatory before substitution.
ICGOODFIND Conclusion
The Infineon AUIRFR9024NTRL stands out as a high-current, low-loss switching solution optimized for automotive and industrial power systems. Its strength lies in its exceptionally low on-resistance and robust construction. When selecting this MOSFET or a replacement, designers must prioritize Rds(on), current handling, and switching performance to ensure the reliability and efficiency of the end application.
Keywords: Power MOSFET, Low On-Resistance, Synchronous Buck Converter, Automotive Applications, TO-252 Package.
