New power stage ICs contribute to smaller size and lower loss

ROHM has created power stage ICs with built-in 650V GaN HEMTs and gate driver – the BM3G0xxMUV-LB series. The devices are excellent for primary power supplies inside industrial and consumer applications, including data servers and AC adapters.

Consumer and industrial sectors have demanded greater energy savings to attain a sustainable society in the last few years. However, while GaN HEMTs are expected to contribute significantly to greater miniaturisation and improved power conversion efficiency, the difficulty in handling the gate compared to silicon MOSFETs needs a dedicated gate driver. In response, the company developed power stage ICs that integrate GaN HEMTs and gate drivers into a single package by using core power and analog technologies, enabling mounting considerably.

On top, the BM3G0xxMUV-LB series (BM3G015MUV-LB, BM3G007MUV-LB) includes further functions and peripheral components designed to maximise GaN HEMT performance along with 650V GaN HEMTs – the next generation of power devices. The company features, such as a wide drive voltage range (2.5V to 30V), allow compatibility with virtually any controller IC in primary power supplies – enabling the replacement of existing silicon (Super Junction) MOSFETs. This makes it possible to simultaneously lower component volume and power loss by approximately 99% and 55%, respectively, delivering higher efficiency in a smaller size.

ISAAC LIN, general manager, PSADC (Power Semiconductor Applications Development Centre), Delta Electronics, Inc.,

"GaN devices are attracting a great deal of attention in the industries as a device that greatly contributes to the miniaturisation and energy saving of equipment.

ROHM's new products have realised high speed and safe gate drive by using ROHM's original analog technology. These products will further promote the use of GaN power devices, which are expected to grow."

Application examples include optimised for primary power supplies (AC/DC, PFC circuits) in various applications. Consumer examples include home appliances, AC adapters, PCs, TVs, refrigerators, air conditioners, and industrial covers servers and office automation devices.