Previously, synchronous rectification in resonant half-bridge topologies has not been commercially viable due to the complexity of varying system frequency and low standby power regulations. Here, the IR1167 enables simple SR for a major boost in system efficiency.  -   Stephen Oliver     Quotes
Previously, synchronous rectification in resonant half-bridge topologies has not been commercially viable due to the complexity of varying system frequency and low standby power regulations. Here, the IR1167 enables simple SR for a major boost in system efficiency. Stephen Oliver
 Complexity