Hybrid IGBTs with built-in SiC diode

New Products |
By Jean-Pierre Joosting

Qualified under the AEC-Q101 automotive reliability standard, the RGW60TS65CHR, RGW80TS65CHR, and RGW00TS65CHR hybrid IGBTs from ROHM feature an integrated 650 V SiC Schottky barrier diode. The RGWxx65C series devices are ideal for automotive and industrial applications that handle large power, such as photovoltaic power conditioners, onboard chargers, and DC/DC converters used in electric and electrified vehicles (xEV). (Figure 1)

The RGWxx65C series utilizes ROHM’s low-loss SiC Schottky barrier diodes in the IGBT’s feedback block as a freewheeling diode that has almost no recovery energy and thus minimal diode switching loss. Additionally, since the recovery current does not have to be handled by the IGBT in turn-on mode, the IGBT turn-on loss is reduced significantly. Both effects together result in up to 67% lower loss over conventional IGBTs and 24% lower loss compared with Super Junction MOSFETs (SJ MOSFETs) when used in vehicle chargers. This effect provides good cost performance while contributing to lower power consumption in industrial and automotive applications.

Figure 1.

In recent years, global efforts to reduce environmental burden and achieve a carbon-neutral and decarbonized society have spurred the proliferation of electrified vehicles (xEV). At the same time, the diversification of power semiconductors used in various vehicle inverter and converter circuits necessary to configure more efficient systems is currently underway, along with technological innovation of both ultra-low-loss SiC power devices (i.e. SiC MOSFETs, SiC SBDs) and conventional silicon power devices (e.g. IGBTs, Super Junction MOSFETs).

To provide effective power solutions for a wide range of applications, ROHM is focusing not only on product and technology development for industry-leading SiC power devices, but for silicon products and driver ICs as well (Figure 2).

Figure 2.

The devices are sampling now, with mass production expected in December 2021.

Application examples include automotive chargers (onboard chargers, vehicle DC/DC converters, solar power inverters (power conditioners), and uninterruptible power supplies (UPS). (Figure 3)

Figure 3.

A broad range of design data is also available on ROHM’s website, including simulation (SPICE) models and application notes on drive circuit design – necessary for integration and evaluation that supports quick market introduction.


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