Infineon Linear LED Controller IC | DigiKey Daily

Infineon offers their BCR601, which is a linear LED controller IC that regulates LED current using an external driver transistor. It supports either NPN bipolar transistors or N-channel MOSFETs to cover a wide LED current and power range, and provides hot-plug protection. The IC utilizes an Active Headroom Control, which is an architecture that allows a linear LED controller to achieve maximum system efficiency by actively adjusting the AC-to-DC voltage feedback loop to apply minimum voltage headroom on the output. For achieving better light quality, the controller suppresses the voltage ripple of the power supply driving a constant LED current. The LED current can be dimmed by external resistors or by use of analog voltages connected to the multi-function input-output pin.