Compact driver increases thermal management in automotive LED lamps

For automotive socket type LED lamp applications such as rear lamps, turn, fog and position lamps or daylight running lamps (DRLs), Rohm has introduced the BD18336NUF-M compact linear LED driver.

The monolithic design ensures stable lighting during battery voltage drops down to 9V, says the company. The configurable current bypass function prevents LEDs from turning off and keeps a minimum brightness at all times. The 3.0mm² package reduces the mounting area by 30 per cent compared to conventional solutions using external circuitry, while providing a high current output of 600mA, adds Rohm.

Heat generated by the LEDs is suppressed by an integrated current derating function. The thermal adjustable output current limits the heat generated by the LEDs, increasing their life expectancy. This makes the LED driver suitable for white as well as for red and yellow LEDs.

Target applications are compact designs in vehicles, for example exchangeable socket type or modular lamps.

Samples are available now, with OEM quantities expected in July 2020.

Rohm Semiconductor develops and manufactures low power microcontrollers, power management ICs and standard ICs, SiC diodes, MOSFETs and modules, power transistors and diodes, LEDs and also passives components such as resistors, tantalum capacitors and LED display units. The company has manufacturing plants in Japan, Korea, Malaysia, Thailand, the Philippines, China and Europe.

Lapis Semiconductor (former OKI Semiconductor), SiCrystal and Kionix are companies of Rohm Semiconductor Group.

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