FSQ510 Datasheet, PDF (1/15 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch (FPS) for Quasi-Resonant Converter - Low EMI and High Efficiency

PRELIMINARY DATASHEET
August 2006
FSQ510, FSQ510H — Green Mode Fairchild Power
Switch (FPS^TM) for Quasi-Resonant Converter
– Low EMI and High Efficiency
Features
ƒ Uses a DMOS Integrated Power Switch
ƒ Optimized for Quasi-Resonant Converter (QRC)
ƒ Low EMI through Variable Frequency Control and
Inherent Frequency Modulation
ƒ High Efficiency through Minimum Voltage Switching
ƒ Extended Quasi-Resonant Switching for Wide Load
Ranges
ƒ Small Frequency Variation for Wide Load Ranges
ƒ Advanced Burst-Mode Operation for Low Standby
Power Consumption
ƒ Pulse-by-Pulse Current Limit
ƒ Various Protection Functions: Overload Protection
(OLP), Abnormal Over-Current Protection (AOCP),
Internal Thermal Shutdown (TSD) with Hysteresis
ƒ Under-Voltage Lockout (UVLO) with Hysteresis
ƒ Internal Start-up Circuit
ƒ Internal High-Voltage SenseFET (700V)
ƒ Built-in Soft Start (5ms)
Applications
ƒ Cell Phone Chargers
ƒ Auxiliary Power Supplies for PC and White Goods
Description
A Quasi-Resonant Converter (QRC) generally shows
lower EMI and higher power conversion efficiency than a
conventional hard-switched converter with a fixed
switching frequency. The FSQ510(H) is an integrated
Pulse-Width Modulation (PWM) controller and
SenseFET specifically designed for quasi-resonant off-
line Switch Mode Power Supplies (SMPS) with minimal
external components. The PWM controller includes an
integrated fixed-frequency oscillator, Under-Voltage
Lockout (UVLO), 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 solution, the
FSQ510(H) can reduce total cost, component count,
size and weight; while simultaneously increasing
efficiency, productivity, and system reliability. This
device provides a basic platform that is well suited for
cost-effective designs of quasi-resonant switching
flyback converters.
Ordering Information
Part
Number
Package
FSQ510 7-DIP
FSQ510H 8-DIPH
Pb-
Free
Maximum Output Power ⁽¹⁾
Operating
Temperature
Range
Current
Limit
R_{DS(ON) 230VAC ± 15%}⁽²⁾
(MAX)
Adapter⁽³⁾
Open
Frame⁽⁴⁾
85-265VAC
Adapter⁽³⁾
Open
Frame⁽⁴⁾
Yes -25℃ to +85℃ 320mA 32Ω
5W
7W
4W
5W
Yes -25℃ to +85℃ 320mA 32Ω
5W
7W
4W
5W
Replaces
Devices
FSD210B
FSD210HD
Notes:
1. The junction temperature can limit the maximum output power.
2. 230VAC or 100/115VAC with doubler.
3. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient.
4. Maximum practical continuous power in an open-frame design at 50°C ambient temperature.
© 2006 Fairchild Semiconductor Corporation
FSCQ510, FSCQ510H Rev. 0.0.3
www.fairchildsemi.com