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New Products
January 24, 2013
IR's SmartRectifier with SYNC Function Simplifies Design and Reduces Overall System Cost
International Rectifier Corp. expanded its family of SmartRectifier™ ICs with the introduction of the IR1169 high speed synchronous rectifier (SR) controller for 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.
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Unlike existing solutions, the advanced new device uses direct sensing with capacitor coupling to help simplify design and reduce overall system cost. Featuring IR's proprietary 200V high-voltage IC technology, the IR1169 supports burst mode operation to deliver efficiency benefits even at light loads. 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.
"While synchronous rectification provides significant energy savings compared to diode-based designs, traditional SR methods are complex and require a high component count. The advanced IR1169 SmartRectifier delivers increased power density for even greater efficiency and reliability in flyback, forward and half-bridge topologies while simplifying design and reducing component count to lower overall system cost," said Helen Ding, Senior Applications Engineer, IR's Energy Saving Products Business Unit.
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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 11V to 20V.
Available in an 8-pin SOIC package, pricing for the IR1169SPbF begins at US $0.73 each in quantities of 10,000-units. Production quantities are available immediately. The devices are lead free and RoHS compliant.
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