N3856V

NIKO-SEM Synchronous Rectification Controller N3856V N3856P GENERAL DESCRIPTION The N3856 is a low cost , high efficiency, full featured ,synchronous re ctification control ler that specifically des igned for the synchronous rectification applications of the Flyback AC/DC PWM mode switching power supply . The N3856 is included a totem pole output ideally suited for driving a synchronous rectification power MOSFET . 2 way of the current detect provided for wide applications by any continuous or disco tinuous mode operating (patent pending).In cont inuous mode operating, it included a timi ng control to adjust maximum turn-on duty to allow the designer to determine the optimal condition for the best efficiency by the external resistor and capacitor. In disconti nuous mode operating, it included a very sensitive current detector (about 20mV) to cont rol the synchronous rectification MOSFET, avoid happening a large reverse current via the synchronous rectification MOSFET to damage the device. FEATURES ▲High efficiency operating. ▲Adjustable Max. duty cycle designed. ▲Decrease areas of heatsink or PCB. ▲Solved heat dissipation. ▲Sensitive current detecter(about 20mV) ▲Suited for continuous and discontinuous mode operation. ▲Auto frequency tracking with PWM frequency. ▲Suited for fixed or variable frequency ▲SOIC-8 and DIP-8 package. APPLICATION ■Flyback AC/DC power supply DEVICE SELECTION GUIDE DIP- 8 N3856PG SOIC- 8 N3856VG ABSOLUTE MAXIMUM RATING PARAMETERS SYMBOL Vcc to ...