Monolithic Power Systems MP6924
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.DESCRIPTION
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 APPLICATIONFEATURES
● 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 TVs
● Isolated DC/DC Power Converters All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.