Infineon IRFS7730TRL7PP Power MOSFET: Datasheet, Application Circuit, and Pinout Configuration
The Infineon IRFS7730TRL7PP is a state-of-the-art N-channel Power MOSFET engineered for high-power switching applications. Utilizing Infineon's advanced OptiMOS 7 technology, this component sets a new benchmark for efficiency and power density in a compact D²PAK 7-pin (TO-263-7) package. It is specifically designed to meet the rigorous demands of modern power conversion systems, including server and telecom SMPS, OR-ing and hot-swap circuits, and synchronous rectification.
Key Datasheet Parameters and Features
The datasheet for the IRFS7730TRL7PP reveals its exceptional performance characteristics. It is rated for a drain-source voltage (VDS) of 200V and a continuous drain current (ID) of up to 420A at a case temperature (TC) of 25°C. Its most defining feature is its extremely low on-state resistance (RDS(on)) of just 0.85 mΩ (max. at VGS = 10 V), which is a primary factor behind its high efficiency. This low RDS(on) directly translates to reduced conduction losses, minimizing heat generation and improving overall system reliability. Furthermore, the device offers a low gate charge (Qg), which ensures fast switching speeds and lowers driving losses, making it ideal for high-frequency operation.
Pinout Configuration
The IRFS7730TRL7PP is housed in a D²PAK-7 (TO-263-7) package. This package is an industry-standard with seven pins that provide superior thermal and electrical performance compared to its three-pin predecessor. The pinout is crucial for proper PCB layout and heat sinking. The primary connections are:
Pins 1, 5, 6, 7: These are all connected internally to the source (S) terminal. Using multiple pins for the source provides a lower inductance path and improves current handling.
Pin 2: This is the gate (G) terminal. Care should be taken to drive this pin with a suitable gate driver IC to ensure fast and clean switching transitions.
Pins 3, 4: These are connected internally to the drain (D) terminal. The drain connection is also made through the large tab at the top of the package, which is designed to be soldered directly to the PCB's copper area for maximum heat dissipation.
Typical Application Circuit: Synchronous Buck Converter
A classic application for the IRFS7730TRL7PP is as the low-side switch in a synchronous buck converter, a common topology in voltage regulator modules (VRMs) and DC-DC converters. In this circuit:
1. A control IC drives two MOSFETs: a high-side switch and the IRFS7730TRL7PP as the low-side switch.
2. The controller generates complementary PWM signals to alternately turn the two MOSFETs on and off.
3. When the high-side switch is on, the low-side switch (IRFS7730TRL7PP) is off, and current flows from the input to the output inductor and load.
4. When the high-side switch turns off, the controller immediately turns on the IRFS7730TRL7PP. Its ultra-low RDS(on) provides a very efficient path for the inductor's freewheeling current, drastically reducing the power loss that would occur across a diode in a non-synchronous design.
The efficiency of this entire circuit is heavily dependent on the performance of the low-side MOSFET, making the IRFS7730TRL7PP's parameters critical for achieving peak system performance.
ICGOODFIND Summary
The Infineon IRFS7730TRL7PP represents the pinnacle of power MOSFET technology, delivering an unparalleled combination of extremely low on-resistance, high current capability, and robust thermal performance in a space-efficient package. Its advantages in reducing both conduction and switching losses make it an optimal choice for designers aiming to push the boundaries of power density and efficiency in next-generation computing, telecommunications, and industrial power systems.
Keywords:
Power MOSFET
OptiMOS 7
Low RDS(on)
Synchronous Rectification
D²PAK-7
