In December 2012, Linear Technology launched the LT3761, a 60 V DC/DC controller designed to operate as a constant-current source and constant-voltage regulator.
Features and USP: The LT3761’s 4.5 V to 60 V input voltage range makes it ideal for a wide variety of applications, including automotive, industrial and architectural lighting. The LT3761 uses an external N-channel MOSFET and can drive up to 15 1A white LEDs from a nominal 12 V input, delivering in excess of 50 watts. It incorporates a high side current sense, enabling its use in boost mode, buck mode, buck-boost mode or SEPIC topologies. The LT3761 can deliver efficiencies of over 94 per cent in the boost topology, eliminating the need for external heat sinking. A frequency adjust pin permits the user to program the frequency between 100 kHz and 1 MHz, optimising efficiency while minimising the external component size and cost.
For further details: Ph: (91) 80 4012 4610; www.linear.com
