The NCP4303A/B is a full featured controller and driver tailored to control synchronous rectification circuitry in switch mode power supplies. Thanks 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 24 V output applications.

特性

Automatic parasitic inductance compensation input

40 ns turn off delay from current sense input to driver output

Externally adjustable minimum on and minimum off times

Wide Vcc operating range up to 30 V

Disable input for standby mode

Maximum frequency of operation up to 500 kHz

True secondary ZCD with adjustable threshold

5 A / 2.5 A peak sink / source drive capability

应用

终端产品