LED driver ICs for high-CRI color-mix SSL applications LED driver ICs that can independently power two LED channels, enabling lamps and luminaires that deliver both high-CRI, warm-white light, and high efficacy. The use of two-channel driver electronics is a requisite in a color-mixed white SSL products. The white and red or amber LEDs have different forward voltage characteristics. Moreover, more white than color LEDs are generally needed. And the driver has to adjust the relative drive currents during dimming to achieve an incandescent-like, dim-to-warm-CCT experience. In many cases today, SSL product developers must utilize two separate driver ICs to implement color-mixed designs. The ICs include a linear controller used to drive a primary channel of white LEDs and a buck controller designed to drive a color LED string. The IC requires external MOSFETs. Atmel made the decision not to integrate MOSFETs to provide product developers freedom in supporting a range of string vo...