OSRAM FIREFLY™, SFH 4030B

AS1181 is an 8-channel highly integrated self-contained LED/VCSEL driver for near to eye applications such as Augmented Reality (AR) and Virtual Reality (VR) glasses. This eye-safety LED driver integrates extended safety monitoring functions to ensure eye-safe operation for smart glasses and other AR/VR applications. These safety monitors include LED short detection, LED open detection, LED overcurrent protection, LED on time monitor as well as temperature shutdown and a built-in-self test (BIST). The device is configurable via a serial wire interface (I²C or I3C) with interrupt and provides two Strobe/PWM inputs to synchronize illumination with up to two external cameras for binocular eye tracking systems. The LED current is individually programmable per channel, and it can drive up to 2 IR LEDs per current sink with a minimum ON time of 10μs and a maximum current of 66mA per channel. General purpose LED driving applications can be supported via a direct PWM input applied at the Strobe pin and it can drive RGB or white LEDs considering a maximum forward voltage of 5V. The device comes in a tiny wafer-level-chip-scale package (WLCSP) with 0.4mm pitch and dimensions of 2.9mm x 1 .75mm x 0.5mm (L x W x H).