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Monolithic converter drives high-power LEDs

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 a constant LED current, regardless of input and output voltages. Now a single switching regulator with the ability to be configured in a large variety of topologies for high power constant LED current is available.

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