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PR 169-2015/ROHM
SPS IPC Drives 2015: ROHM Shows The Industry’s First
AC/DC Converter Control IC for SiC Drive
Enables to use of SiC MOSFET to achieve greater energy savings and
miniaturization in industrial applications
Willich-Münchheide/Nuremberg, November 24th, 2015 – ROHM shows its
recently announced AC/DC converter control IC designed specifically for SiC MOSFET
drive in industrial equipment such as servers and other large power applications at
SPS IPC Drives (Hall 1, Booth 320).
The BD7682FJ-LB allows the easy implementation of SiC-MOSFETs to an AC/DC
converter AC/DC converter design has proved challenging when using discrete
configurations due to the large number of components required. In contrast, ROHM’s
latest product provide a high integrated solution and creates new standards for
energy savings and miniaturization while supporting the adoption of SiC power
semiconductors that provide breakthrough levels of efficiency and performance.
Compared to silicon MOSFETs used in conventional AC/DC converters, SiC MOSFETs
enable AC/DC converters with improved power efficiency by up to 6%. Furthermore,
components used for heat dissipation are not required (50W Class power supplies),
leading to greater compactness. The specification of BD7682FJ-LB also include
multiple protection functions that enable support for high voltages up to 690VAC,
making them ideal for general industrial equipment while improving reliability.
In recent years there has been an increasing trend to conserve energy in all areas.
This includes high voltage industrial equipment applications. To achieve this targets
it’s necessary to adopt advanced power semiconductors and power supply ICs.
Among these, SiC power semiconductors are expected to gain ground over silicon
solutions due to their higher voltage capability, greater energy savings, and more
compact form factor.
However, until now there has not been a control IC that can sufficiently draw out the
performance of SiC MOSFETs, particularly in AC/DC converter systems. As a result
designers are faced with numerous problems related to power consumption and
stability in a variety of high power applications.
To meet these needs, ROHM utilizes market-proven analogy technology with SiC
power semiconductor expertise to develop the industry’s first AC/DC converter
controller specialized for driving SiC MOSFETs. And going forward ROHM will continue
to pioneer industry-leading solutions, including the development of new AC/DC
converter control ICs with integrated SiC MOSFETs.
Availability: The product is available (samples).
Key Features
1． Maximizes SiC MOSFET performance for breakthrough energy savings
The BD7682FJ-LB integrates a gate drive circuit optimized for SiC MOSFET drive by
combining analog design technology with SiC power semiconductor development
expertise. In addition, a quasi-resonant system delivers lower noise and higher
efficiency vs conventional PWM methods, making it possible to maximize the
performance of SiC MOSFETs used in AC/DC converters, resulting in significant power
savings.
2. SiC MOSFET contributes to unmatched miniaturization
Unlike with conventional Si MOSFETs, adopting SiC MOSFETs in AC/DC converters
eliminates the need for components used for heat dissipation, contributing to smaller,
lighter AC/DC converter designs. Support for higher switching frequencies (i.e.
120kHz) is also ensured, expanding applicability while improving efficiency.
3．Multiple protection circuits support high voltage operation up to 690VAC
Various protection circuits enable high voltage operation in AC/DC converters up to
690VAC – ideal for general 400VAC industrial applications. And in addition to
overvoltage protection for the supply voltage pin and brown in/out (undervoltage)
countermeasure for the input voltage pin, overcurrent and secondary overvoltage
protection functions are included, enabling continuous operation in industrial
equipment while improving reliability considerably.
SiC MOSFET Advantages
SiC MOSFETs provide several advantages
over Si MOSFETs in the high voltage region,
including lower switching and conduction
losses, high power compatibility, and
increased resistance to temperature
changes. Leveraging these benefits makes
it possible to improve power conversion
efficiency, miniaturize components for heat
dissipation, increase operating frequency to support smaller coils and more, resulting
in increased power savings, lower component count, and smaller mounting area.
Terminology
・SiC (Silicon Carbide)
A compound semiconductor composed of silicon and carbide. Provides characteristics
and performance superior to silicon, making it the most viable successor to silicon in
the power semiconductor field.
・AC/DC Converter
A type of power supply that converts AC voltage to DC. Generally, devices that
operate on DC voltage require additional components to connect to an AC
outlet/power source.
・MOSFET (Metal Oxide Semiconductor Field Effect Transistor)
A type of basic semiconductor transistor. External voltage is supplied to turn the
transistor ON/OFF. It can also be used as a switching device to control current flow.
・Power Semiconductor
A type of semiconductor that converts voltage and/or current depending on the
application, with performance directly linked to the power efficiency of the device and
system. Compatibility with large voltages and currents is needed.
About ROHM Semiconductor
ROHM Semiconductor is a global company of 362,772 million yen (3,30 billion
US$) revenue with approx. 20,800 employees in the last fiscal year ending March
2015. ROHM Semiconductor develops and manufactures a very large product
range from the Ultra Low Power Microcontroller, Power Management, Standard
ICs, SiC Diodes, Mosfets and Modules, Power Transistors and Diodes, LEDs to
passives components such as Resistors, Tantalum Capacitors and LED display
units, thermal Printheads in state-of-the-art manufacturing plants in Japan, Korea,
Malaysia, Thailand, the Philippines, China and Europe.
AGLED, Kionix, Lapis Semiconductor (former OKI Semiconductor), Powervation
and SiCrystal AG are companies of ROHM Group.
ROHM Semiconductor Europe has its head office near Dusseldorf serving the EMEA
region (Europe, Middle East and Africa). For further information please contact
www.rohm.com/eu
Contact Information:
ROHM Semiconductor GmbH
Media Department
Karl-Arnold-Str. 15
D-47877 Willich-Münchheide
Germany
Phone: +49 2154 921 0
Fax: +49 2154 921450
E-mail: [email protected]
KEK Concept GmbH
Evelyn Stepken
Hofer Str. 1
D-81737 Munich
Germany
Phone: +49 89 673 461-30
Fax: +49 89 673 461-55
E-mail: [email protected]
Caption:
ROHM presents the industry’s first AC/DC converter control IC for SiC drive.