Recently, the semiconductor giant ROHM has release its first single-chip LED driver-------BD8381EFV-M which are making a big splash on LED area of interest. According to the market report, experts forecast that the led market is now continuing to see a large growth in the long term.
The part was developed specifically for automotive headlamp and DRL use and incorporates such features to be a built-in PWM function to utilize with DRLs, which significantly more common on vehicles sold in Europe along with the United Tells. The single-chip design includes the actual range of functionality required to serve a good LED driver circuit, within turn previous designs has consisted of a general-purpose LED driver LSI or even a series of discrete ingredients. ROHM began shipping samples within the new product in April (sample pricing: JPY400/part) and plans states mass production with an monthly amount of 50,000 parts in July 2011. Vehicle plans to separate production to a pre-process handled by ROHM Wako Company., Ltd., (Okayama Prefecture) and a post-process handled by ROHM Integrated Systems (Thailand) Company., Ltd., (Thailand).
Automakers are gradually switching to LED lighting for automotive headlamps, and LED-based headlamps are anticipated to eventually account a great deal of of the market due towards higher efficiency and longer service life promised via technology. Increasingly, manufacturers are equipping their vehicles with LED-driven DRLs to ensure an optimal level of safety and visibility, and LED headlamps and DRLs are widely expected as being a host fixture of automotive equipment specifications. At the current time, use of LED headlamps is in order to certain parts of the market such when your luxury segment, and automakers and headlamp manufacturers get general-purpose LED driver LSIs or designs based on discrete components, necessitating addition of fidel castro of cover your jewelry . driver circuit when equipping the vehicle with DRLs. ROHM launched an early effort to increase a dedicated LSI to be with LED headlamps founded on its forecast of upcoming adoption using this technology, resulting in the development of an LSI incorporating all the functionality in order to serve a good LED driver that might be used with headlamps.
The BD8381EFV-M provides PWM light modulation without a microcontroller which include a built-in oscillator circuit for use with DRLs, which are beginning to enter into widespread use particularly in Europe and the United States, where automakers are pioneering their bring into play. The part also offers a range of protective functionality to detect headlamp faults such as LED short and open states much better meet vehicle market's need for a high level of reliability. This design feature dramatically improves reliability by the connected with components typically the part to reduced when solutions consisting of discrete components or general-purpose LED driver LSIs. An absolute maximum voltage of 50 V provides product sufficient dielectric strength to withstand battery voltage fluctuations.
ROHM, this can help a wide range of LED driver products for handy in mobile phones, thin-panel displays, and other devices, has earned praise from customers in the LED driver LSI market thanks to features while low power consumption and reliability. The creation of the BD8381EFV-M was made possible by the exhaustive associated with capabilities ROHM brings towards the table, including extensive knowledge of LED driver circuit technology and a commitment to delivering high sums of quality and reliability, as an example by building a dedicated production line for your automotive present. Going forward, the company gives further strengthen its portfolio of LED driver LSI products for your automotive electrical component market, which is expected to still experience dynamic growth.
DRL Daytime running lights; DRLs make vehicles more visible to pedestrians in regions for North America and Europe, where fog is a common occurrence, by turning for that headlamps during daytime times. A constant current is supplied to the LEDs inside day, nevertheless the current is subject to PWM control at occasion.
Key benefits that BD8381EFV-M offers:
Input voltage range house.0 - 30 V
Integrated buck-boost current-mode DC/DC controller
Built-in CR timer for PWM brightness
PWM linear brightness
Built-in protection functions (UVLO, OVP, TSD, OCP, SCP)
LED error status detection function (OPEN/ SHORT)
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