The SI4947DY-T1 is a P-Channel and N-Channel MOSFET from Vishay Siliconix, designed for a wide range of power management applications. This device combines both P-channel and N-channel MOSFETs in a single package, enabling efficient synchronous rectification and other power conversion topologies. Its low on-resistance (RDS(on)) minimizes power losses and improves overall system efficiency.

Applications

• Synchronous Rectification in DC-DC Converters
• Load Switching
• Power Management in Portable Devices
• Battery Management Systems
• High-Side Load Switching

Features

• Low RDS(on) for both P-Channel and N-Channel MOSFETs, reducing conduction losses.
• Logic Level Gate Drive, allowing direct drive from low voltage logic circuits.
• Surface Mount Package, enabling compact designs and efficient thermal management.
• TrenchFET® Power MOSFET Technology for enhanced performance and efficiency.
• Halogen-Free according to IEC 61249-2-21 definition

Benefits

• Improved System Efficiency due to low RDS(on) and reduced power losses.
• Simplified Circuit Design with integrated P-Channel and N-Channel MOSFETs.
• Reduced Board Space with a compact surface mount package.
• Enhanced Thermal Performance allowing operation at higher power levels.
• Compatibility with Low Voltage Logic Circuits simplifying interfacing.

Additional Details

The SI4947DY-T1 operates with a gate-source voltage (VGS) range that allows for logic-level gate drive, facilitating its integration into a variety of circuits. The device’s RDS(on) is typically specified at different gate-source voltage levels, providing designers with the data necessary to optimize its performance in their specific applications. The surface mount package enhances thermal conductivity, allowing for efficient heat dissipation and reliable operation. This MOSFET is designed to meet stringent industry standards for environmental compliance, ensuring its suitability for a wide range of applications.

Specifically, the P-Channel MOSFET typically exhibits an RDS(on) of around 50 mOhms at VGS = -4.5V, while the N-Channel MOSFET has an RDS(on) of around 30 mOhms at VGS = 4.5V. These values may vary slightly depending on the specific manufacturing lot and operating conditions. The device is typically available in a SO-8 package.