Infineon AUIRF1404ZSTRL N-Channel Power MOSFET: Datasheet, Pinout, and Application Circuit Guide

The Infineon AUIRF1404ZSTRL is a robust N-Channel Power MOSFET engineered for high-power switching applications. Leveraging advanced silicon technology, this component is a cornerstone in modern power electronics, offering an exceptional balance of low on-state resistance and high switching speed. This guide provides a detailed overview of its key specifications, pin configuration, and a practical application circuit.

Datasheet Overview and Key Specifications

The AUIRF1404ZSTRL is part of Infineon's HEXFET® power MOSFET family. Its primary advantage lies in its very low typical on-resistance (RDS(on)) of just 1.6 mΩ at a gate-to-source voltage (VGS) of 10 V. This ultra-low resistance minimizes conduction losses, leading to higher efficiency and reduced heat generation in high-current applications.

Other critical parameters from the datasheet include:

Drain-to-Source Voltage (VDS): 40 V

Continuous Drain Current (ID): 162 A at 25°C

Avalanche Energy Rated: Suitable for rugged environments with inductive loads.

Fast Switching Speed: Optimized for high-frequency operation.

Low Gate Charge (Qg): Ensures simple drive requirements.

Fully Avalanche Rated: Enhances reliability in demanding conditions.

Package: D2PAK (TO-263), a surface-mount package designed for efficient power dissipation.

Pinout Configuration

The AUIRF1404ZSTRL is offered in the standard D2PAK (TO-263) surface-mount package. The pinout is straightforward:

1. Gate (G): This pin receives the control signal from the driver IC. A voltage typically between 5V and 10V relative to the Source pin is applied here to turn the MOSFET ON.

2. Drain (D): This is the output pin connected to the load. The large tab on the top of the package is electrically connected to the Drain pin and is the primary path for the load current.

3. Source (S): This pin is connected to the ground or the common return path for the load current.

Application Circuit Guide: A Basic High-Current Switch

A fundamental application for the AUIRF1404ZSTRL is a high-current switch, commonly used in power supplies, motor controllers, and DC-DC converters.

Components Required:

Microcontroller (MCU) or PWM generator

MOSFET Driver IC (e.g., IR2104, TC4427)

Infineon AUIRF1404ZSTRL MOSFET

Load (e.g., DC Motor, Solenoid)

Power Supply (12V-24V for the load)

Decoupling capacitors

Circuit Operation:

1. The microcontroller generates a low-power Pulse Width Modulation (PWM) signal.

2. This signal is fed into a MOSFET driver IC. Using a dedicated driver is crucial because the AUIRF1404ZSTRL has significant gate capacitance. The driver provides the high peak current needed to rapidly charge and discharge the gate, enabling fast switching and minimizing transition losses.

3. The driver output is connected directly to the Gate (G) pin of the MOSFET.

4. The Drain (D) pin is connected to one terminal of the load (e.g., a motor).

5. The other terminal of the load is connected to the main positive power supply (e.g., 24V).

6. The Source (S) pin is connected to system ground.

7. When the PWM signal is high, the driver applies a sufficient VGS (e.g., 10V), turning the MOSFET ON. This creates a low-resistance path between Drain and Source, allowing current to flow through the load.

8. When the PWM signal is low, the driver pulls the Gate voltage to ground, turning the MOSFET OFF and stopping current flow. The speed of the motor or the power to the load is controlled by the duty cycle of the PWM signal.

Design Considerations:

Gate Driving: Always use a proper gate driver for fast and efficient switching.

Heat Sinking: Although the RDS(on) is very low, at high currents, power dissipation (I²R) can be significant. Proper PCB layout with a large copper area for the Drain tab is essential to act as a heat sink. For extreme loads, an external heatsink may be required.

Protection: Consider adding a reverse protection diode for inductive loads like motors to manage voltage spikes during turn-off.

ICGOOODFIND

In summary, the Infineon AUIRF1404ZSTRL stands out as an ICGOODFIND for designers seeking a highly efficient and reliable power switching solution. Its industry-leading ultra-low RDS(on) and high current handling capability make it an excellent choice for demanding automotive, industrial, and power management applications where minimizing energy loss is paramount.

Keywords:

Power MOSFET, Low RDS(on), High-Current Switch, HEXFET, D2PAK Package