7W LED-driver IC provides 350 mA

摘要

Targeting use in tunnel-lighting, automotive-lighting, and similar applications, the new Catalyst Semiconductor CAT4201 buck-regulator driver can deliver 7W of power to a string of white LEDs operating from a 24V rail. The device delivers 1W when driving an LED off a 6V rail and delivers as much as 350 mA to the LED. By using a buck-regulator rather than a linear-regulator architecture, the device achieves efficiency as high as 94%. Catalyst manufactures the device using a high-performance, high-voltage CMOS process so that it can withstand 40V transients on the input A single pin provides dimming and control.