Device Increases System Efficiency 1.5 Percent and Reduces Rectifier Device Temperature by 25 Degrees Celsius

While synchronous rectification provides significant energy savings compared to diode-based designs, traditional SR methods are complex and require a high component count. Using only two gate resistors and a supply capacitor, the IR1168 delivers a lower system temperature and increased power density for even greater efficiency and reliability than existing SR methods while simplifying design and drastically reducing component count to shrink PCB size.

Co-designed with IR’s DirectFET MOSFETs, which feature IR’s latest Trench silicon and packaging technology, the IR1168-based solution delivers an efficiency improvement of 1.5% for a standard 240W LCD TV SMPS and a reduction of rectifier device temperature of 25°C while shrinking board size by two thirds.

The IR1168, featuring IR’s proprietary high-voltage IC technology, 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. 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 ultra low quiescent current, 10.7V gate drive clamp, 70ns turn-off propagation delay and a wide Vcc operating range from 8.6V to 18V.