White LEDs feature high luminous intensity in small package

Rohm Semiconductor has introduced its CSL1104WB family of ultra-compact, high luminous intensity white LEDs. These devices target applications that require high brightness white light emission, such as IoT devices, drones, and other battery-operated applications.

The CSL1104WB white LEDs achieve a high luminous intensity of 2.0 cd in an ultra-compact 1608 (0603) size (1.6 × 0.8 mm = 1.28 mm²), which was previously difficult to achieve, said Rohm. This delivers the same luminosity as the mainstream 3528 size PLCC package (3.5 × 2.8 mm = 9.8 mm²), but in an 87% smaller form factor.

High luminous intensity of 2.0 cd for white LEDs have been increasingly adopted to improve visibility in a range of applications in the consumer electronics and automotive sectors, said Rohm. “At the same time, the emergence of applications that mount multiple LEDs in a small space – such as IoT devices and drones – require high density mounting. This makes it difficult to achieve high brightness in a compact footprint.”

In addition, the color variation in the new series is significantly improved, which simplifies the color adjustment process by ensuring accurate white color chromaticity. This not only contributes to greater application space savings, but also improves design flexibility along with visibility through high density mounting of high luminosity LEDs, which helps reduce the development effort, said Rohm.

Qualification to the automotive reliability standard AEQ-Q102 for optical devices is planned. This will enable the devices to be used in harsh industrial and automotive applications. The company also plans to expand its portfolio of 1608-size white LEDs from low to high brightness. The white LEDs are available from Rohm’s authorized distributors Digi-Key, Farnell, and Mouser Electronics.