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Full-bridge DC/DC controller touts up to 150°C junction temp

Posted: 08 Apr 2013     Print Version  Bookmark and Share

Keywords:Linear Technology  DC/DC controller  LTC3722-1  MOSFET  zero voltage switching 

Linear Technology Corp. has uncloaked the H-grade version of the LTC3722-1, a phase-modulated full bridge DC/DC controller with adaptive or manual zero voltage switching (ZVS). According to the company, the device's ZVS delay control and adjustable synchronous rectification timing optimise efficiency while cutting transformer size and electromagnetic interference.

Geared for isolated high power applications of up to several kilowatts, the LTC3722-1's adaptive zero voltage technology is accomplished by sensing the bridge MOSFETs and input voltage. This enables the converter to adapt to any change in load current, temperature, component tolerances, driver circuitry delay or input voltage variations. Additional features include fixed frequency current mode control, adjustable current limit, leading edge blanking, soft start, short-circuit protection and programmable slope compensation. An accurate 5V low dropout regulator provides up to 15mA to power auxiliary circuits.

The H-grade version operates up to a junction temperature of 150°C, compared to the E- and I-grade versions' 85°C maximum junction temperature. The H-grade product is tested and guaranteed to the maximum junction temperature of 150°C, making it ideal for automotive and industrial applications which are subjected to high ambient temperatures, added Linear Tech.

The LTC3722-1 is available in an SSOP-24 package. The 1000-piece price starts at Rs.335.48 ($6.24) each for the H-grade device.





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