描述 Description

The FT838D/FT838R controller device is optimized for high-performance, low power switching mode power supply applications. The FT838D/FT838R facilitates CC/CV charger design by eliminating an opto-coupler and TL431. Its highly integrated functions such as Under Voltage Lockout (UVLO), Leading Edge Blanking (LEB) and built-in cable compensation offer the users a high efficiency and low cost solution for AC/DC power applications.
Power supplies built with FT838D can achieve both highest average efficiency and fast dynamic load response. FT838R is optimized for LED driver applications with slightly higher (~22uA) standby current.
Furthermore, FT838D/FT838R features fruitful protections like Open Circuit Protection and Over Temperature Protection to eliminate the external protection circuits and provide reliable operations. FT838D/FT838R is avilabel in SOT23-5 package.

特性 Features

Constant-Current (CC) and Constant-Voltage (CV) with Primary Side Control
Proprietary technology enabling high efficiency and fast dynamic response
No audible noise over entire operating range
Applications from 1W to more than 18W output
Direct drive of BJT or MOS switch?
Built-in Cable Compensation
Built-in Line Compensation
Primary-side feedback eliminates opto-coupler and TL431
Cycle-by-Cycle Current Limiting
Over Temperature Protection
VCC Over Voltage Protection
Open Circuit Protection

應用 Application

???Adapter/Charger for Cell/Cordless Phones,?PDAs, MP3 and Other Portable Apparatus
·???Standby and Auxiliary Power Supplies,?Set Top Boxes (STB)
·???AC/DC LED Driver applications