The LT3952 is a current mode step-up DC/DC converter with an internal 60 V, 4 A DMOS power switch. It is specifically designed by Linear Technology to drive high power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage source. The LT3952’s 3 V to 42 V input voltage range makes it ideal for a wide variety of applications, including automotive, industrial and architectural lighting.
60V LED Driver with Internal 4A Switch & PWM Generator – [Link]