NIKO-SEM Synchronous Rectification Controller
N3867V N3867P
GENERAL DESCRIPTION
The N3867 is a low cost, high efficien...
NIKO-SEM Synchronous Rectification Controller
N3867V N3867P
GENERAL DESCRIPTION
The N3867 is a low cost, high efficiency, synchronous rectification controller that specifically designed for the synchronous rectification applications of the Fly-back AC/DC PWM mode switching power supply. The N3867 is included a totem pole output ideally suited for driving a synchronous rectification power
MOSFET. In the QR mode or discontinuous mode operating, the current detector properly turns off the synchronous rectification power
MOSFET by detecting the dropout
voltage between source and drain pin. In continuous mode operating, it provides the Aout pin for turning off the GATE output while receive a turn-off signal from the primary side. The operation of N3867 prevents secondary side shoot-through condition by a cycle by cycle control method.
FEATURES
▲High efficiency operating. ▲Decrease areas of heatsink or PCB. ▲Solved heat dissipation. ▲Sensitive current detecter(about 20mV) ▲Suited for discontinuous,QR or continuous
mode operation. ▲Auto frequency tracking with PWM
frequency. ▲Suited for fixed or variable frequency ▲SOIC-8 and DIP-8 package.
APPLICATION
■Fly-back AC/DC power supply ■Pin to pin compatible with N3856
DEVICE SELECTION GUIDE
SnPb N3867P
DIP-8
Pb Free N3867PG
SnPb N3867V
SOP-8
Pb Free N3867VG
THERMAL DATA
PARAMETER Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case
SYMBOL
θja θjc
DIP-8
53 23
UNIT /W /W
ABSOLUTE MAXIMUM RATING
PARAMET...