LED Driver supports automotive headlamp cluster functions.October 20, 2010 -
Suitable for high-beam, low-beam, and daytime running light circuits, Model BD8381EFV-M controls dimming without PWM output. Current-mode buck/boost controller provides stable operation over 5-30 V input range and removes constraints on number of LEDs in series connection. In addition to integrated protection that monitors voltage, current, and temperature, IC includes LED open and short circuit protection.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
ROHM Semiconductor USA LLC
10145 Pacific Heights Blvd., Suite 1000
San Diego, CA, 92121
USA
ROHM LED Driver Targets Automotive Headlamp Cluster Functions
LED driver suitable for high-beam, low-beam and daytime running light circuits; controls dimming without PWM input; provides range of protection functions; unique buck/boost topology more efficient and requires fewer external components
SAN DIEGO, Calif. - ROHM Semiconductor announces the availability of the Model BD8381EFV-M high-brightness LED driver for automotive forward illumination applications. With this new flexible IC, designers can now specify the same driver for use in high-beam, low-beam and daytime running light (DRL) circuits.
The BD8381EFV-M current-mode buck/boost controller provides stable operation over a wide input voltage (5-30V) and removes constraints on the number of LEDs in series connection. Integrated protection monitors voltage, current and temperature. LED open and short circuit detection is also provided. The BD8381EFV-M has an internal PWM controller so dimming functions can be implemented with a simple external CR circuit. This same circuit can be implemented to limit output current in case of LED overtemperature detection.
Senior Design Engineering Manager for ROHM Semiconductor, Nick Ikuta, said, "Instead of having to select a different drive for each headlamp function, designers can now use one device. Because of its buck/boost configuration, it can handle series LED connections numbering from just one to several."
Pricing: US$8.00 (Small OEM Quantities)
Availability: Samples by year-end, Mass Production April/May 2011
Delivery: 12 weeks ARO
About ROHM Semiconductor:
ROHM Semiconductor is an industry leader in system LSI, discrete components and module products, utilizing the latest in semiconductor technology. ROHM's proprietary production system, which includes some of the most advanced automation technology, is a major factor in keeping it at the forefront of the electronic component manufacturing industry. In addition to its development of electronic components, ROHM has also developed its own production system so that it can focus on specific aspects of customized product development. ROHM employs highly skilled engineers with expertise in all aspects of design, development and production. This allows ROHM the flexibility to take on a wide range of applications and projects and the capability to serve valuable clients in the automotive, telecommunication and computer sectors as well as consumer OEMs.
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