LED, light emitting diode, V.I Chip

LED constant current demonstration board from Vicor's V.I Chip

News Release from: Vicor UK
28/05/2008

V.I Chip, Inc., a subsidiary of Vicor Corporation, has announced a constant current (CC) PRM regulator demonstration board for light emitting diode (LED) applications such as street & stadium lighting, high-end projectors, active outdoor advertising and architectural installations.

The board provides a precisely regulated current as required for direct-drive multi-LED applications where the intensity and brightness are controlled by regulating the current through the LEDs. The board can be used to provide adjustable current up to 240 W (5 A at 48 V) when employed as an standalone non-isolated source or can be combined with the range of VTMTM transformers to provide an adjustable isolated current up to 100 A.

A PRM+VTM pair uses less than 1 W for every 1,000 Lumens generated by the LEDs for high performance applications. This solution is a perfect complement to using BCMTM bus converters with low voltage driver ICs for lower power applications such as LED TV backlighting.

The constant current board demonstrates the high power density of the PRM with current accuracy of 99.7% across the load range. The board has Kelvin connections for measuring the efficiency of the V.I Chip™ components independent of load connect losses. Oscilloscope probe jacks are available for measuring output voltage, including output voltage ripple. The board has fused PRM inputs, provision for mounting an optional V.I Chip pushpin heat sink, and system enable and disable.