The LT3796 series of 100V, high-side current sense DC/DC controllers from Linear Technology are designed to regulate a constant current or voltage. Used for driving high brightness LEDs, the devices’ 6V to 100V input voltage range supports a wide variety of applications, including automotive, industrial and architectural lighting. The controllers use an external N-channel MOSFET and can drive up to 85V of white LEDs from a 12V input, delivering in excess of 50 W. The LT3796 is also suitable for charging batteries or supercaps at constant current and voltage and its high-side current sense enables its use in boost, buck, buck-boost or SEPIC and flyback topologies. It also offers both input and output current limiting and monitoring. The LT3796EFE is available in a thermally enhanced TSSOP-28 package at $3.45 each/1,000. The LT3796IFE, an extended temperature, I-grade version is available starting at $3.86 each/1,000. The LT3796HFE, a high temperature, H-grade option is available starting at $4.11 each/1,000.
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