ROHM Semiconductor - ROHM was established in Kyoto, Japan, in 1958. ROHM designs and manufactures semiconductors, integrated circuits and other electronic components. These components find a home in the dynamic and ever-growing wireless, computer, automotive and consumer electronics markets. Some of the most innovative equipment and devices use ROHM products.
For over fifty years, ROHM's venture spirit and flexibility have kept them ahead of the technology curve. ROHM is an industry leader in system LSI utilizing the latest in semiconductor technology.
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Design
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 | | USB/MP3 Audio Media Decoder - USB audio decoder ICs from ROHM easily integrate a USB 2.0 host, SD memory card controller, AAC decoder, WMA decoder, MP3 decoder, Audio DAC amp, and a system controller all on a single chip, allowing easy playback of music stored in USB flash memory using an audio player. They can be easily added to virtually any audio device for greater functionality. BU94603KV is AAC+WMA+MP3 decoder IC in which a USB host I/F, SD memory card I/F, audio DAC and system control functions are built. Using a KEY or I²C interface command, the IC reads out a MP3 file written to a memory device having a USB I/F or a SD memory card.
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 | | Flexible Step-Down Switching Regulators - ROHM Semiconductor provides a number of step down switching regulators with integrated MOSFETs. These solutions provide simple step-down power management, used in significant numbers for several applications. From the incorporation of shutdown functionality to increased efficiency, switching regulators offer numerous benefits over industry standard options such as linear regulators. The ROHM BD9329EFJ can provide up to 3 A and the BD9328 can provide up to 2 A of output current at the required output voltage.
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 | | BP527x Series Converter Module - This 3-pin DC/DC converter module series from ROHM integrates all required components and allows for high-power operation without using any external components.
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 | | BD9673(1.5 A) and BD9876(3.0 A) Regulators - ROHM's flexible switching regulators with built-in MOSFET enable arbitrary setting of the operating frequency via external resistor.
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ROHM Electronic Laboratory is now up and running. Easily design circuits and evaluate characteristics using our new interactive web-based simulation tool. Freely vary the external components and input signals and create parts lists, simplifying the selection process. Currently, ROHM Electronic Laboratory is available for switching regulators and H-bridge drivers.
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ROHM Engineering Help Desk is used by ROHM employees, customers, rep staff, and distribution partner personnel. Coverage extends to both North and South America, and most submissions will receive a response within 24 hours of submission. Simple inquiries typically receive a reply within one to two hours after they are received into the HelpDesk.
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Additional LinksAnnouncement of Company Name ChangeCompany ProfileContact UsROHM Industries Acquires OKI’s Semiconductor BusinessSales/LocationsMore about LAPIS SemiconductorElectronic devices represented by LSI are key technology that supports ubiquitous network society developing and evolving continuously. Aiming to become a "niche leader" in the personal and mobile markets, LAPIS Semiconductor is focusing on development of unique LSI such as system LSI, logic LSI, and system memory using its original technologies in the areas of ultra-low power consumption and high speed and high voltage process. LAPIS Semiconductor will continue to promote marketing and developing products, especially focusing on the three fields of telecommunication, information appliance and automotive in the personal and mobile markets. LAPIS Semiconductor can also offer production solutions realizing high-value-added LSIs with its original high voltage CMOS process technology and its manufacturing service. LAPIS Semiconductor will offer the competitive total silicon solutions under the recognition that all systems are integrated into silicon and software. LAPIS Semiconductor is taking numerous initiatives to conserve and improve the environment so that people and technology can co-exist and harmonize with nature. LAPIS Semiconductor have been trying to hand down a comfortable and sound environment and profitable assets to the future. Click here for more information about LAPIS Semiconductor.
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Reference Design
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BD9673EFJ_EVK: 5V @ 1.5A, 7 ~ 45V in
This evaluation board has been developed for ROHM’s step-down switching regulator customers evaluating BD9673EFJ and/or BD9876EFJ. While accepting a wide power supply of 7-42V, a step down output of 1.2V/1.8V/3.3V/5V or any other user defined voltage can be produced. The ICs have an internal 200mohm Nch MOSFET (3.5A max) and a synchronization frequency range of 200 kHz to 500 kHz. A Soft Start circuit prevents in-rush current during startup along with UVLO (low voltage error prevention circuit) and TSD (thermal shutdown detection) protection circuits. An EN pin allows for simple ON/OFF control of the IC to reduce standby current consumption. |
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BD9876EFJ_EVK: 5V @ 3A, 7 ~ 45V in
This evaluation board has been developed for ROHM’s step-down switching regulator customers evaluating BD9673EFJ and/or BD9876EFJ. While accepting a wide power supply of 7-42V, a step down output of 1.2V/1.8V/3.3V/5V or any other user defined voltage can be produced. The ICs have an internal 200mohm Nch MOSFET (3.5A max) and a synchronization frequency range of 200 kHz to 500 kHz. A Soft Start circuit prevents in-rush current during startup along with UVLO (low voltage error prevention circuit) and TSD (thermal shutdown detection) protection circuits. An EN pin allows for simple ON/OFF control of the IC to reduce standby current consumption. |
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