MP6924

MP6924, MP6924A Fast Turn-off, CCM/DCM Compatible Dual LLC Synchronous Rectifier with low Sleep Mode Current DESCRIPTION The MP6924, MP6924A is a dual, fast turn-off, intelligent rectifier for synchronous rectification in LLC resonant converters. The IC drives two N-channel MOSFETs, regulates their forward voltage drop to Vfwd(MP6924:45mV,MP6924A:29mV), and turns the MOSFETs off before the switching current goes negative. The MP6924, MP6924A has a light-load function to latch off the gate driver under lightload conditions, limiting the current to 175μA. The MP6924, MP6924A’s fast turn-off enables both continuous conduction mode (CCM) and discontinuous conduction mode (DCM). The MP6924, MP6924A requires a minimal number of readily available, standard, external components and is available in a SOIC-8 package. Table 1: MP6924A vs. MP6924 Turn-off Blanking 1.75μs vs. 210ns Time Improve noise immunity Driving Capability Be half Improve EMI performance Forward Voltage 29mV vs. 45mV Improve efficiency TYPICAL APPLICATION FEATURES Works with Standard and Logic Level MOSFETs Compatible with Energy Star Fast Turn-Off Total Delay of 35ns Wide 4.2V ~ 35V VDD Operating Range 175µA Low Quiescent Current in Light-Load Mode Supports CCM, CrCM, and DCM Operation Supports High-Side and Low-Side Rectification Power Savings of Up to 1.5W in a Typical Notebook Adapter Available in a SOIC-8 Package APPLICATIONS AC/DC Adapters PC Power Supplies LCD and LED TV...