80V N-Channel Power MOSFET for Digital Power Management

Toshiba has released the TPM1R408RH, an 80-volt N-channel power MOSFET designed to improve the efficiency of industrial switching power supplies. This component addresses the thermal and energy demands of digital infrastructure, specifically targeting high-current distribution systems.

Application In Digital Power Infrastructure
The rapid expansion of high-density computing requires highly efficient switch-mode power supplies (SMPS) to manage increasing electrical loads. The deployment of this advanced semiconductor technology targets energy distribution in data centers and communication base stations. In these continuous-operation environments, converting and distributing power with minimal thermal dissipation is critical for maintaining process stability, reducing cooling requirements, and lowering overall operational costs within the broader power management infrastructure.

Minimizing Conduction and Switching Losses
The transistor utilizes the U-MOS11-H trench manufacturing process to balance the structural trade-off between on-state resistance and total gate charge. Operating at a gate-source voltage of 10 volts and a drain current of 50 amperes, the component achieves a maximum on-state resistance of 1.4 mΩ. This represents a 26 percent reduction in resistance compared to the previous generation U-MOS XH process.

Additionally, the device maintains a total gate charge of 80 nC, yielding a figure of merit of 112 mΩ·nC. This 45 percent improvement in the figure of merit directly translates to reduced switching losses and the mitigation of voltage spikes between the drain and source. Controlling these voltage transients helps lower electromagnetic interference (EMI) during the high-speed switching operations required by modern industrial power supplies.

Structural Architecture and Thermal Management
Engineered for high-current industrial applications, the MOSFET supports a drain-source voltage of 80 V and a maximum drain current of 288 A at a case temperature of 25 °C. The silicon is housed in a compact SOP Advance(E) surface-mount package measuring 4.9 by 6.1 millimeters. Compared to the previous SOP Advance(N) packaging standard, this structural design reduces package resistance by 65 percent and thermal resistance by 15 percent. These physical improvements enable power design engineers to maintain high current densities without expanding the physical footprint of the printed circuit board.

Additional Context
This section details technical specifications and competitive benchmarking not included in the original news release.

The 80-volt N-channel power MOSFET market is highly competitive, driven by the strict efficiency standards of server power supplies and telecommunications equipment. A standard benchmark in this class is the Infineon OptiMOS 5 80-volt series, such as the BSC014N08NS5, which also operates in a standard 5 by 6 millimeter SuperSO8 footprint. The Infineon component achieves a maximum on-state resistance of 1.4 mΩ, closely matching the 1.4 mΩ baseline of the Toshiba U-MOS11-H device.

However, differences in internal trench design dictate how these components manage gate charge and switching speed. While both components serve the same voltage class, the reduction of package thermal resistance by 15 percent in the Toshiba SOP Advance(E) design allows the component to compete directly with dual-cool or top-side cooling packages utilized by competitors like onsemi and Texas Instruments for high-density power conversion. Comparing figure of merit metrics remains the primary objective method for engineers determining the most efficient component for a specific soft-switching or hard-switching topology.

Edited by Aishwarya Mambet, Induportals Editor, with AI assistance.

www.toshiba.com