FSDM311_06 Datasheet, PDF (1/19 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch (FPS TM)

FSDM311
Green Mode Fairchild Power Switch (FPS™)
July 2006
Features
ƒ Internal Avalanche Rugged SenseFET
ƒ Precision Fixed Operating Frequency (67KHz)
ƒ Advanced Burst-Mode Operation (power consumption
< 0.1W at 265VAC, no-load condition)
ƒ Internal Start-up Circuit
ƒ Pulse-by-Pulse Current Limit
ƒ Over-Voltage Protection (OVP)
ƒ Over-Load Protection (OLP)
ƒ Internal Thermal Shutdown Function (TSD)
ƒ Auto-Restart Mode
ƒ Under-Voltage Lockout (UVLO) with Hysteresis
ƒ Built-in Soft-Start
Applications
ƒ Charger & Adapter for Mobile Phone, PDA & MP3
ƒ Auxiliary Power for White Goods, PC, C-TV & Monitor
Related Application Notes
ƒ AN-4137, AN-4141, AN-4147 (Flyback)
ƒ AN-4134 (Forward)
ƒ AN-4138 (Charger)
Description
The FSDM311, consisting of integrated Pulse-Width
Modulator (PWM) and SenseFET, is specifically
designed for high-performance, off-line Switch Mode
Power Supplies (SMPS) with minimal external
components. This device is an integrated high-voltage,
power-switching regulator which combines a VDMOS
SenseFET with a voltage mode PWM control block. The
integrated PWM controller features include: a fixed
oscillator, Under-Voltage Lockout (UVLO) protection,
Leading Edge Blanking (LEB), an optimized gate turn-
on/turn-off driver, Thermal Shutdown (TSD) protection,
and temperature-compensated, precision-current
sources for loop-compensation and fault-protection
circuitry. When compared to a discrete MOSFET and
controller or RCC switching converter solution, the
FSDM311 device reduces total component count and
design size and weight; while increasing efficiency,
productivity, and system reliability. This device provides
a basic platform that is well suited for the design of cost-
effective flyback converters.
Ordering Information
Product Number
FSDM311
FSDM311L
Package
8DIP
8LSOP
Marking Code
DM311
DM311
BV_DSS
650V
650V
f_OSC
67KHz
67KHz
R_{DS (ON)}
14Ω
14Ω
FPS™ is a trademark of Fairchild Semiconductor Corporation.
© 2003 Fairchild Semiconductor Corporation
FSDM311 Rev. 1.1.0 • 7/14/06
www.fairchildsemi.com