They are suitable for a wide range of demanding applications, such as servers in data centers, switched-mode power supplies (SMPS) for industrial equipment, and power conditioners for photovoltaic (PV) generators.
The DTMOSVI 600 V series, featured in these new products, has been designed with an optimized gate design and process. This optimization has resulted in a reduction of the drain-source resistance (RDS(ON)) per unit area of approximately 13%. Furthermore, the crucial figure of merit (FOM) for MOSFET performance, RDS(ON) × gate-drain charge (Qgd), has been reduced by approximately 52% compared to Toshiba's previous generation DTMOSIV-H series products with the same drain-source voltage (VDS) rating of 600 V. For example, the TK024Z60Z1 has an RDS(ON) of 20 mΩ and a Qgd of 37 nC. This results in a better balance between conduction loss and switching loss, directly contributing to the high efficiency of switched-mode power supplies.
The new products incorporate a four-pin TO-247-4L(X) package, which includes a dedicated signal source terminal for gate control. This design improvement significantly reduces the impact of switching due to source lead inductance within the package, a common problem in conventional three-pin packages. In three-pin packages, the source lead inductance generates a counter-electromotive force (EMF) that reduces the effective gate control voltage, slowing the MOSFET's switching speed. In contrast, the four-pin package connects the signal source terminal close to the FET chip, mitigating this effect and allowing the applied voltage between the gate and source to be approximately equal to the gate control voltage. This improvement increases switching speed and enhances high-speed switching performance, contributing to the high efficiency required in applications such as servers, uninterruptible power supplies (UPS), and photovoltaic inverters. However, it is important to note that the TO-247-4L(X) package has a different appearance and dimensions compared to Toshiba's existing four-pin TO-247-4L package, as it features a cavity between the drain and source pins to increase the creepage distance.
Toshiba continues to support circuit designers by offering a range of tools, including the G0 SPICE model for quick circuit function verification and the high-precision G2 SPICE models that accurately reproduce transient characteristics.
Toshiba is committed to further expanding its DTMOSVI 600 V series product range, contributing to the continuous improvement of energy efficiency in electronic equipment.
