ams OSRAM AS1181 Eight-Channel LED/VCSEL Driver is a highly integrated self-contained driver for near-to-eye applications such as Augmented Reality (AR) and Virtual Reality (VR) glasses. The AS1181 incorporates extended safety monitoring functions to ensure safe operation for the eyes. The safety monitors comprise LED short detection, LED overcurrent protection, LED open detection, LED on-time monitor, as well as temperature shutdown and a built-in self-test (BIST). The ams OSRAM AS1181 Eight-Channel LED/VCSEL Driver is configurable through a serial wire interface (I²C or I3C) with an interrupt and delivers two strobe/PWM inputs to synchronize illumination with up to two external cameras for binocular eye tracking systems. The LED current is separately programmable per channel, and it can drive up to two IR LEDs per current sink with a minimum ON-time of 10μs and a maximum current of 66mA per channel.
