Linear Technology Corporation Announces New Forward Converter Chipset

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Isolated Forward Converter Chipset Simplifies Design While Enhancing System Reliability

Linear Technology Corporation, the leading designer of broad line of high performance analog integrated circuits, announces the LTC3765 and LTC3766 synchronous forward converter chipset with active clamp reset and Direct Flux LimitTM . The chipset prevents power transformer saturation under all conditions. The LTC3765 is a primary-side intelligent controller that works in concert with the LTC3766 to implement a robust and simple self-starting isolated power supply. After start-up, the LTC3765 receives timing signals and bias power from the secondary-side LTC3766 controller through a tiny pulse transformer.

In traditional active clamp forward converters, a large change in output load or input voltage can cause the power transformer to saturate, resulting in converter failure. However, Linear Technology system prevents transformer saturation under all conditions, increasing overall converter reliability while maintaining a superior transient response when compared to alternative solutions. The products provide an essential bridge between our analog world and the digital electronics in many widely used systems.

This type of forward converter design is well suited for 12V, 24V and 48V nominal input voltages that are commonly found in telecom, datacom and industrial applications. Additional features include a fast & accurate average current limit, fixed-frequency adjustable operation from 75kHz to 500kHz, clean start-up into pre-biased loads, multiphase operation for high power designs, overtemperature protection and true remote output voltage sense.

The LTC3765 is available in a thermally enhanced MSOP-16 package and the 1,000-piece price starts at $1.55. The LTC3766 is available in a 4mm x 5mm QFN-28 and SSOP-28
packages and the 1,000-piece pricing starts at $2.60.
For more information about the new forward converter chipset, visit http://www.linear.com.

About Linear Technology
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for three decades. The Company’s products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, and μModule® subsystems.

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John Hamburger
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