Advanced pulse-frequency modulated controller targets DC-DC controllers

Mouser now stocks the Fairchild FAN7688 advanced pulse-frequency modulated controller which offers best-in-class efficiency for isolated DC-DC converters. It is a controller for LLC resonant converters with synchronous rectification (SR) and employs a current-mode control technique based on a charge control. The triangular waveform from the oscillator is combined with the integrated switch current information to determine the switching frequency. This provides a better control-to-output transfer function of the power stage simplifying the feedback loop design while allowing true input power limit capability, says the company.