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ROHM’s AC/DC Converter ICs with Built-In SiC MOSFET

ROHM has released AC/DC converter ICs with a built-in 1700V SiC MOSFET, BM2SC12xFP2-LBZ in the TO 263-7L package, optimized for industrial applications focusing on auxiliary power supplies for street lamps, commercial air-conditioning systems, general-purpose inverters and AC servos drives.

ROHMAn auxiliary power supply is an essential part of industrial applications to deliver different levels of DC voltages for gate drivers and control units. By applying existing Si MOSFET devices, the designer cannot achieve higher efficiency and increased out power because of the higher losses of Si devices.

ROHM’s BM2SC12xFP2-LBZ power ICs are the Quasi-resonant (QR) AC/DC converters with an integrated 1700V SiC MOSFET in a single compact surface-mount package (TO263).

These ICs are the right fit and best in class products for industrial auxiliary power supply solutions in terms of efficiency, shortening design time, simplifying the circuitry and reducing additional components by offering integrated solutions. These ICs also increase product reliability by minimizing the risk of component failure.

When used in 400VAC 48W output auxiliary power supplies, besides enabling automatic board mounting that was not previously possible, the number of external parts can be significantly reduced compared with standard configurations – from 12 parts and heat sink to just one.

At the same time, adopting a SiC MOSFET improves power efficiency by up to 5% and minimizes the risk of component failure. This makes it possible to dramatically increase reliability and energy savings in industrial equipment while significantly reducing mounting area and costs.

In addition, ROHM’s Evaluation board BM2SC123FP2-EVK-001 using our AC/DC BM2SC123FP2-LBZ IC is available to support designers. This board delivers power up to 48W at 400VAC without any heatsink.

The test result of the evaluation board shows the output voltage (24V) is constant and independent from the input voltage.

ROHM leads the industry in developing ICs that maximize the performance of SiC power semiconductors, including the offering of through-hole package AC/DC converter ICs equipped with high voltage, low-loss SiC MOSFET in 2019.

ROHM is committed to continuing to develop advanced analog control ICs and power semiconductors, such as SiC devices while providing optimized solutions that contribute to greater energy savings and performance in industrial equipment.


Aishwarya Saxena

A book geek, with creative mind, an electronics degree, and zealous for writing.Creativity is the one thing in her opinion which drove her to enter into editing field. Allured towards south Indian cuisine and culture, love to discover new cultures and their customs. Relishes in discovering new music genres.

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