FSQ211 Datasheet, PDF (1/13 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch (FPS TM)

April 2007
FSQ211
Green Mode Fairchild Power Switch (FPS^TM)
Features
ƒ Internal Avalanche-Rugged SenseFET
ƒ Precision Fixed Operating Frequency (67KHz)
ƒ Burst-Mode Operation
ƒ Internal Start-up Circuit
ƒ Pulse-by-Pulse Current Limiting
ƒ Overload Protection (OLP)
ƒ Internal Thermal Shutdown Function (TSD)
ƒ Auto-Restart Mode
ƒ Under-Voltage Lockout (UVLO) with Hysteresis
ƒ Built-in Soft-Start
ƒ Secondary-Side Regulation
Applications
ƒ Charger & Adapter for Mobile Phone, PDA, & MP3
ƒ Auxiliary Power for White Goods, PC, C-TV, &
Monitor
Description
The FSQ211 consists of an integrated Pulse Width
Modulator (PWM) and SenseFET, 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 that 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 FSQ211 device
reduces total component count and design size and
weight, while increasing efficiency, productivity, and
system reliability. This device provides a basic platform
well suited for cost-effective flyback converters.
Related Application Notes
ƒ AN-4137 Design Guidelines for Off-line Flyback
Converters using FPS™
ƒ AN-4141 Troubleshooting and Design Tips for
Fairchild Power Switch (FPS™) Flyback Applications
ƒ AN-4147 Design Guidelines for RCD Snubber of
Flyback
ƒ AN-4134Design Guidelines for Off-line Forward
Converters using FPS™
ƒ AN-4138Design Considerations for Battery Charger
Using Green Mode Fairchild Power Switch (FPS™)
Ordering Information
Part Number
FSQ211
FSQ211L
Package
8DIP
8LSOP
Top Mark
Q211
Q211L
BV_DSS
650V
650V
f_OSC
67KHz
67KHz
R_DS(ON)
18Ω
18Ω
FPS^TM is a trademark of Fairchild Semiconductor Corporation
© 2007 Fairchild Semiconductor Corporation
FSQ211 Rev. 1.0.0
www.fairchildsemi.com