ROHM Semiconductor Unveiled New LED SMLx Family with Reflector for Backlighting Apps

ROHM Semiconductor unveiled its new high power, high brightness white chip LED SMLx family with reflector (PLCC2 & high heat radiation packages) for automotive backlighting applications. Today, the increased functionality of clusters, car audio & navigation, climate control, switches and LCD/TFT backlighting create a high demand for efficiency while also relying on constant light emission, power saving and stability. With its new LED and LED drivers line-ups ROHM addresses the specific needs of these advanced application areas. Within the new SMLZ1xx, SMLKxx,SMLVxx & SMLXAxx LED family, designers can choose from a variety of top and side view package types, forward currents as well as luminous intensity (mcd). The emitted colors are cold white and warm white. Additionally, the new LEDs offer high heat radiation for operation at high temperature, maintenance of high power at high currents, as well as for superior device reliability and durability. With the development of its new BD81A04 LED driver series, ROHM is now able to provide a complete design solution for display backlighting. The new IC is a 4 channel 120mA/ch LED driver with an integrated buck-boost dc-dc constant current driver which can be used to drive various LEDs for efficient backlighting of a large range of displays or HuDs (Head-up Displays). Due to its unique topology it only requires one coil for buck-boost configuration and provides stable operation over a wide voltage range, significantly reducing design work and the number of required external components. In addition the BD81A04 integrates MOSFETs like the PWM current driver or the boost FET. This reduces the number of external components even further. The advanced brightness control/dimming functions and the flexibility to combine fewer channels with higher output current round up the features of this device. For example, instead of using four channels with 120mA, it’s now possible to achieve 240mA via two channels. In order to ensure reliable operations all protection functions like the monitoring voltage, current, temperature or the short circuit detection function are implemented as well. Source: www.powerpulse.net