Ultra-High-Efficiency 76V DC/DC Buck Converter
Provides high reliability and greater energy savings ideal for communications infrastructure and industrial equipment
Kyoto and Santa Clara, Calif., -- October 27, 2015 -- ROHM is announcing the availability of
a 12 to 76V input, 3A variable output voltage, DC/DC Buck converter with integrated 76V
MOSFET optimized for high power (high voltage x large current) applications such as
motors, factory automation equipment, communications infrastructure, and industrial
machinery.
In recent years, with the increasing importance to conserve energy in all areas comes a
push to achieve greater energy savings – even in the industrial equipment sector – through
the use of high power semiconductor devices and power supply ICs.And with this comes a
need to provide breakdown voltages higher than the input voltage to prevent damage due to instantaneous surge and transient
voltages (such as those caused by lightning).
In response, ROHM leverages its advanced cutting-edge power processes and vertically-integrated production system to develop
products for the industrial equipment market that demands long-term, stable supply along with high reliability to enable continuous
operation.
The BD9G341AEFJ utilizes ROHM’s high voltage 0.6um BiCDMOS process to achieve an industry-leading maximum
breakdown voltage of 80V (the highest in ROHM’s non-isolated DC/DC converter lineup) and a continuous operating input range
of 12 to 76V, while market-proven advanced analog design technology results in the highest conversion efficiency in its class. In
addition, multiple protection circuits minimize heat generation, even during output pin shorts (contact), preventing possible damage
and increasing reliability vs. conventional products.And the compact 8pin package requires fewer parts and reduces mounting
area, contributing to easier PCB placement and end-product miniaturization.
Key Features
1. Class-leading 76V breakdown voltage
Cutting-edge 0.6um high voltage BiCDMOS processes are utilized to develop a non-isolated DC/DC buck converter with an
integrated MOSFET featuring the industry’s highest maximum breakdown voltage in its class.As a result, support for input voltages
up to 80V (max.) and 76V (operation) is provided, ensuring sufficient margin against sudden surge voltages in communication
infrastructure , factory automation equipment, industrial machinery, and other applications that normally operate at 48V and higher,
improving system reliability.
2. The industry’s highest efficiency
The industry’s highest power conversion efficiency in the 76V DC/DC
converter class has been achieved by leveraging advanced marketproven analog design technology. Efficiency is increased by 1.5%
compared to conventional products during stable operation and by as
much as 19% (300kHz oscillation frequency, 48V supply, 5V output),
improving energy savings in industrial equipment.
3. Output pin protection prevents damage for improved reliability
Conventional protection functions normally cannot suppress heat
generation during output shorts (contact), which can lead to overheating
and even damage. In contrast, ROHM’s proprietary protection function
minimizes heat generation during accidental output shorts, preventing
damage and improving system reliability.
4. Compact package reduces mounting area and requires fewer
external parts
The BD9G341AEFJ is offered in a compact 8pin package (4.9mm x
6.0mm, t=1.0mm) and features a highly integrated design that reduces
the number of parts required from 17 to 12, simplifying end-product
design, BoM costs, and development efforts.
Applications
・ Communication infrastructure such as switching and base stations, office telephone systems, routers, and other equipment
requiring 48V input.
・ Motor devices exposed to high surge voltages (e.g. electric bicycles, vacuum cleaners, industrial controllers).
Specifications
Part No.
BD9G341AEFJ
Input Voltage
Range
12V to 76V
Output Voltage
Range
1.0V to Vcc
Operating
Frequency
50kHz to 750kHz
(typ.)
Max. Output
Current
3.0A
Operating Temp.
Range
-40ºC to +85ºC
Availability: Now
Pricing: $1.82 /unit (2500pcs)
Terminology
・ DC/DC Converter
A type of power supply IC that converts one DC voltage to another DC voltage (usually lower,
although boost converters exist that increase the voltage).
・ Isolated/Non-Isolated Devices
Isolated devices include countermeasures designed to reduce the risk of electric shock in
high power applications. Non-isolated devices are typically placed downstream of isolated
components and provide superior efficiencies and greater miniaturization.
・ Surge Voltage
A sudden large voltage received by the IC generated externally via motor startup, lightning,
or other means.