In summary, Infineon’s line of medium-power LED drivers are suitable for applications that require driving currents of 100 mA to 250 mA (BCR320U/BCR321U) or 50 mA to 150 mA (BCR420U/BCR421U) with 24 V and 40 V internal breakdown voltages, respectively. If PWM dimming is required, the BCR321U and BCR421U devices have an enable pin that can be interfaced with a microcontroller to achieve this function. Also, for higher power applications, these devices can be paralleled to provide more driving current to satisfy the system requirements.