The NCP4304ADR2G is a secondary side synchronous Rectification Driver for use with high efficiency SMPS topologies. The full featured controller and driver tailored to control synchronous rectification circuitry in switch mode power supplies. Due to its versatility, it can be used in various topologies such as flyback, forward and Half Bridge Resonant LLC. The combination of externally adjustable minimum on and off times helps to fight the ringing induced by the PCB layout and other parasitic elements. Therefore, a reliable and noise less operation of the SR system is insured. The extremely low turn off delay time, high sink current capability of the driver and automatic package parasitic inductance compensation system allow to maximize synchronous rectification MOSFET conduction time that enables further increase of SMPS efficiency. Finally, a wide operating VCC range combined with two versions of driver voltage clamp eases implementation of the SR system in 24V output applications.
Self-contained control of synchronous rectifier in CCM, DCM and QR Flyback applications
Precise true secondary zero current detection with adjustable threshold
Automatic parasitic inductance compensation input
Typically 40ns turn off delay from current sense input to driver
Zero current detection pin capability up to 200V
Disable input to enter standby or low consumption mode
Adjustable minimum on time independent of VCC level
Adjustable minimum off time independent of VCC level
Low start-up and standby current consumption
Maximum frequency of operation up to 500kHz
Allows for proper timing of SR MOSFET turn on and turn off
Maximizes conduction time of the MOSFET to increase efficiency
Improves performance for applications working in deep CCM
Enters the IC into a low consumption standby mode
Prevents accidental MOSFET turn on or turn off due to ringing
Fast turn off of MOSFET for optimized conduction period
Allows for direct supply from the power supply output voltage in a wide range of applications
