Chapter 295

Monolithic converter drives high power LEDs

Keith Szolusha


The LT3477, a versatile, monolithic boost, buck, and buck-boost or SEPIC LED driver with a high power 3A, 42V switch, is described.


LED driver



High power LEDs are quickly expanding their reach as the light source of choice for flat panel computer and TV monitors, TV projection, signage, portable lights and automotive interior, trim and brake lighting. The input voltage and LED voltage combinations across these applications are as diverse as the applications themselves, precluding the ability for a single topology to satisfy the needs of them all. Nevertheless, all LED drivers, whether buck, boost, buck-boost or SEPIC must regulate ...

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