Infineon BSC340N08NS3GATMA1 40V N-Channel MOSFET: Key Specifications and Application Notes
The Infineon BSC340N08NS3GATMA1 is a state-of-the-art N-Channel MOSFET engineered using Infineon’s advanced OptiMOS™ technology. Designed for high-efficiency power conversion and switching applications, this 40V MOSFET offers an exceptional blend of low on-state resistance (RDS(on)) and high current handling capability, making it a preferred choice for demanding industrial, automotive, and consumer electronics.
Key Electrical Specifications
A primary highlight of the BSC340N08NS3GATMA1 is its remarkably low RDS(on), which is typically just 3.4 mΩ at 10 V (VGS). This ultra-low resistance directly translates to reduced conduction losses, leading to higher system efficiency and lower heat generation. The device is rated for a continuous drain current (ID) of 34 A at 25°C, showcasing its ability to handle significant power in a compact package (PG-TDSON-8). Furthermore, its 40V drain-source voltage (VDS) rating makes it well-suited for a variety of low-voltage applications, including those in 12V and 24V systems.
The MOSFET also features a low gate charge (Qg) and fast switching speeds, which are critical for minimizing switching losses in high-frequency circuits. This allows designers to increase the switching frequency of their power supplies, enabling the use of smaller passive components like inductors and capacitors.
Thermal and Package Characteristics
Housed in a DSO-8 (TDSON-8) package, the component offers an excellent power dissipation capability and is designed for effective thermal management. The package features an exposed thermal pad that must be soldered to the PCB to act as a heatsink, efficiently transferring heat away from the silicon die and ensuring reliable operation even under high load conditions.
Primary Application Notes
1. Synchronous Rectification in SMPS: This MOSFET is ideally suited for use as a synchronous rectifier in Switch-Mode Power Supplies (SMPS) for servers, telecom equipment, and gaming consoles. Its low RDS(on) is pivotal in improving the efficiency of the rectification stage.
2. Motor Control and Drives: In automotive systems (e.g., electric power steering, pump controls) or industrial BLDC motor drives, the device can efficiently handle the high currents required for precise and robust motor control.
3. DC-DC Converters: It is an excellent choice for both buck and boost converters in point-of-load (POL) applications, where high efficiency and power density are paramount.
4. Circuit Layout Considerations: To achieve optimal performance, a careful PCB layout is mandatory. Designers must ensure:
A low-inductance and low-resistance path for the high-current loop.
Proper decoupling with ceramic capacitors placed close to the drain and source terminals.
A robust and well-designed gate drive circuit to ensure fast and clean switching transitions, avoiding issues like gate oscillation.
ICGOOODFIND Summary
The Infineon BSC340N08NS3GATMA1 stands out as a highly efficient and reliable power switching solution. Its standout combination of ultra-low RDS(on), high current capability, and superior thermal performance in a small form factor makes it an exceptional component for designers aiming to maximize efficiency and power density in modern electronic systems.
Keywords:
1. Low RDS(on)
2. OptiMOS™ Technology
3. Synchronous Rectification
4. High Current Handling
5. Power Efficiency
