FT838D Datasheet, PDF (1/10 Pages) List of Unclassifed Manufacturers – FT838D

Fremont Micro Devices
FT838D/FT838R
Low-Power Off-Line CC/CV Controller
FEATURES
DESCRIPTION
 Constant-Current (CC) and Constant-Voltage
The FT838D/FT838R controller device is optimized
(CV) with Primary Side Control
for high-performance, low power switching mode
 Proprietary technology enabling high
power supply applications. The FT838D/FT838R
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
facilitates CC/CV charger design by eliminating an
opto-coupler and TL431. Its highly integrated
ly ^{functions such as Under Voltage Lockout (UVLO),}
Leading Edge Blanking (LEB) and built-in cable
n ^{compensation offer the users a high efficiency and}
low cost solution for AC/DC power applications.
O _{Power supplies built with FT838D can achieve both}
highest average efficiency and fast dynamic load
e _{response. FT838R is optimized for LED driver}
s _{applications with slightly higher (~22uA) standby}
U ^current.
 Open Circuit Protection
TYPICAL APPLICATION
A _{ Adapter/Charger for Cell/Cordless Phones,}
S _{PDAs, MP3 and Other Portable Apparatus}
 Standby and Auxiliary Power Supplies
U _{Set Top Boxes (STB)}
Fremont ^{ AC/DC LED Driver applications}
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.
© 2013 Fremont Micro Devices Inc.
Confidential Rev0.81
DS838D/838R-A-page1