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Rectifiers from IR promise to ease design, cut cost

Posted: 31 Jan 2013 ?? ?Print Version ?Bookmark and Share

Keywords:rectifier? converters? SR MOSFET?

International Rectifier (IR) has introduced the IR1169 high speed synchronous rectifier (SR) controller as the latest member of its SmartRectifier IC portfolio. According to the company, the device targets flyback, forward and half-bridge converters used in AC-DC adapter, PC, server and Telecom SMPS applications.

The IR1169 features a SYNC function that turns off the SR MOSFET to prevent reverse current flow under continuous conduction mode (CCM) operation, thereby improving functionality and reliability. Unlike existing solutions, the device uses direct sensing with capacitor coupling to help simplify design and reduce overall system cost, IR indicated.

International Rectifier IR1169

IR1169. Supports burst mode operation to deliver efficiency benefits even at light loads.

Featuring IR's proprietary 200V high-voltage IC technology, the IR1169 supports burst mode operation to deliver efficiency benefits even at light loads, the company stated. Ruggedness and noise immunity are accomplished using an advanced blanking scheme and double-pulse suppression that allows reliable operation in fixed and variable frequency applications.

Other key features include maximum 500kHz switching frequency, anti-bounce logic and UVLO protection, 4A peak turn-off gate drive current, micropower start-up and low quiescent current, 10.7V gate drive clamp, 50ns turn-off propagation delay and a wide Vcc operating range from 11-20V.

Production quantities are available immediately. Available in an 8-pin SOIC package, the devices are lead free and RoHS compliant.

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