Power Switch. FSQ321 Datasheet

FSQ321 Switch. Datasheet pdf. Equivalent

Part FSQ321
Description Green Mode Fairchild Power Switch
Feature FSQ0365/0265/0165/321 — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter Aug.
Manufacture Fairchild Semiconductor
Datasheet
Download FSQ321 Datasheet




FSQ321
August 2011
FSQ0365, FSQ0265, FSQ0165, FSQ321
Green Mode Fairchild Power Switch (FPS™)
for Valley Switching Converter – Low EMI and High Efficiency
Features
Optimized for Valley Switching Converter (VSC)
Low EMI through Variable Frequency Control and
Inherent Frequency Modulation
High Efficiency through Minimum Voltage Switching
Narrow Frequency Variation Range Over Wide Load
and Input Voltage Variation
Advanced Burst-Mode Operation for Low Standby
Power Consumption
Pulse-by-Pulse Current Limit
Protection Functions: Overload Protection (OLP),
Over-Voltage Protection (OVP), Abnormal Over-
Current Protection (AOCP), Internal Thermal
Shutdown (TSD)
Under-Voltage Lockout (UVLO) with Hysteresis
Internal Startup Circuit
Internal High-Voltage SenseFET: 650V
Built-in Soft-Start: 15ms
Applications
Power Supplies for DVP Player, DVD Recorder,
Set-Top Box
Adapter
Auxiliary Power Supply for PC, LCD TV, and PDP TV
Description
A Valley Switching Converter generally shows lower EMI
and higher power conversion efficiency than a
conventional hard-switched converter with a fixed
switching frequency. The FSQ-series is an integrated
Pulse-Width Modulation (PWM) controller and
SenseFET specifically designed for valley switching
operation with minimal external components. The PWM
controller includes an integrated fixed-frequency
oscillator, under-voltage lockout, Leading-Edge Blanking
(LEB), optimized gate driver, internal soft-start,
temperature-compensated precise current sources for
loop compensation, and self-protection circuitry.
Compared with discrete MOSFET and PWM controller
solutions, the FSQ-series reduces total cost, component
count, size and weight; while simultaneously increasing
efficiency, productivity, and system reliability. This
device provides a basic platform for cost-effective
designs of valley switching fly-back converters.
Related Application Notes
AN-4137 - Design Guidelines for Offline Flyback
Converters Using Fairchild Power Switch (FPS™)
AN-4141 - Troubleshooting and Design Tips for
Fairchild Power Switch (FPS™) Flyback
Applications
AN-4147 - Design Guidelines for RCD Snubber of
Flyback Converters
AN-4150 - Design Guidelines for Flyback
Converters Using FSQ-series Fairchild Power
Switch (FPS™)
AN-4134 - Design Guidelines for Off-line Forward
Converters Using Fairchild Power Switch (FPS™)
© 2007 Fairchild Semiconductor Corporation
FSQ0365, FSQ0265, FSQ0165, FSQ321 • Rev. 1.0.6
www.fairchildsemi.com



FSQ321
Ordering Information
Part Number
FSQ321
Package
8-DIP
Maximum Output Table(1)
Operating Current RDS(ON) 230VAC ±15%(2)
85-265VAC
Temperature
Limit
(Max.) Adapter(3)
Open
Frame(4)
Adapter(3)
Open
Frame(4)
Replaces
Devices
FSQ321L
FSQ321LX
8-LSOP
8-LSOP
(Tape &
Reel)
-40 to +85°C
0.6A
19
8W
12W
7W
10W
FSDL321
FSDM311
FSQ0165RN 8-DIP
FSQ0165RL
FSQ0165RLX
8-LSOP
8-LSOP
(Tape &
Reel)
-40 to +85°C
0.9A
10
10W
15W
9W 13W FSDL0165RN
FSQ0265RN
FSQ0265RL
8-DIP
8-LSOP
-40 to +85°C
1.2A
6
14W
20W
11W
16W
FSDM0265RN
FSDM0265RNB
FSQ0365RN 8-DIP
-40 to +85°C 1.5A
FSQ0365RL 8-LSOP
4.5
17.5W
25W
13W
19W
FSDM0365RN
FSDM0365RNB
Notes:
1. The junction temperature can limit the maximum output power.
2. 230VAC or 100/115VAC with voltage doubler. The maximum power with CCM operation
3. Typical continuous power in a non-ventilated, enclosed adapter measured at 50C ambient temperature.
4. Maximum practical continuous power in an open-frame design at 50C ambient temperature.
© 2007 Fairchild Semiconductor Corporation
FSQ0365, FSQ0265, FSQ0165, FSQ321 • Rev. 1.0.6
2
www.fairchildsemi.com







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