Renesas Electronics has announced the launch of the industry's first 650V bidirectional gallium nitride (GaN) switch, aiming to simplify the power conversion design for applications such as solar micro-inverters, artificial intelligence data centers, and on-board chargers for electric vehicles. The company emphasizes that this new TP65B110HRU device integrates the bidirectional current blocking function in a single chip, eliminating the need for the traditional back-to-back field effect transistor (FET) configuration. 

This technological breakthrough is of great significance - it has solved the long-standing problems of energy efficiency and complexity in high-power conversion design, and at the same time aligns with the industry's trend towards higher integration and simpler architectures. 

Moving towards single-stage power conversion 

It is introduced that traditional power conversion systems rely on unidirectional silicon-based or silicon carbide (SiC) switches, and must adopt a multi-stage architecture. Taking the solar micro-inverter as an example, it usually requires separate DC-DC and DC-AC conversion stages, which will increase the number of components and reduce the conversion efficiency. 

Renesas Electronics stated that its bidirectional gallium nitride solution achieves a true single-stage conversion. Engineers only need two high-voltage devices to replace multiple traditional switches, eliminating the intermediate DC bus capacitor and reducing the number of switches by half. Thanks to the fast switching characteristics and low charge characteristics of gallium nitride devices, the conversion efficiency in practical applications has exceeded 97.5%. 

This transformation will have a wide-ranging impact on system design, especially in scenarios such as data centers and electric vehicle platforms where space is limited and thermal management is demanding. 

Simplified design, enhanced reliability 

The TP65B110HRU adopts a combination of depletion-type gallium nitride devices and two low-voltage silicon-based MOSFETs. It not only achieves bidirectional operation mode but also is compatible with standard gate drivers. Different from the enhancement-type gallium nitride solutions, this device does not require negative gate bias, simplifying the gate drive circuit design and reducing system costs. 

Renesas Electronics placed particular emphasis on the key features of this device: continuous operating voltage of ±650V, transient withstand voltage of ±800V, dv/dt immunity exceeding 100V per nanosecond; integrated reverse conducting diode, supporting soft-switching and hard-switching topologies (including Vienna rectifier). 

Currently, this device has been officially launched. At the same time, an evaluation kit has also been introduced, which supports various drive configurations and soft-switching implementation schemes. 

This new product launch marks a potential turning point in power electronics design. The bidirectional gallium nitride device, by achieving a more streamlined single-stage architecture and reducing the number of components, is expected to accelerate the adoption of high-performance systems in areas such as renewable energy, automobiles, and data infrastructure.