DC1405A - Schematic3/12/2010
Demonstration circuit 1405 is a Triple Boost or Buck/Boost LED Driver featuring the LT3492. The LT3492 is a triple output DC/DC converter designed to operate as current sources for driving LEDs using . Each of the three regulators on the demo board is independently operated. The board can be configured with either boost (default) or buck-boost mode; buck mode is not supported. The current for each output is 61mA in either mode.
The IC's input voltage range is 8V to 30V with 40V transient protection; however the LEDs input power source can be as high as 40V. The overvoltage protection (open LED detect) is set at 58V. For a typical application with a LED voltage of 3.6V, each boost circuit can drive around 15 LEDs. Applications with different input voltages and load combinations can be demonstrated on this circuit with some board modifications.
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