FSQ510MX Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch (FPS) for Valley Switching Converter - Low EMI and High Efficiency

January 2014
FSQ510 / FSQ510MX
Green Mode Fairchild Power Switch (FPS™)
for Valley Switching Converter – Low EMI and High Efficiency
Features
 Uses an LDMOS Integrated Power Switch
 Optimized for Valley Switching Converter (VSC)
 Low EMI through Variable Frequency Control and
Inherent Frequency Modulation
 High Efficiency through Minimum Drain Voltage
Switching
 Extended Valley Switching for Wide Load Ranges
 Small Frequency Variation for Wide Load Ranges
 Advanced Burst-Mode Operation for Low Standby
Power Consumption
 Pulse-by-Pulse Current Limit
 Protection Functions: Overload Protection (OLP),
Internal Thermal Shutdown (TSD) with Hysteresis
 Under-Voltage Lockout (UVLO) with Hysteresis
 Internal Startup Circuit
 Internal High-Voltage SenseFET: 700 V
 Built-in Soft-Start: 5 ms
Applications
 Auxiliary Power Supplies for LCD TV, LCD Monitor,
Personal Computer, and White Goods
Description
A Valley Switching Converter (VSC) generally shows
lower EMI and higher power conversion efficiency than
a conventional hard-switched converter with a fixed
switching frequency. The FSQ510 is an integrated
Valley Switching Pulse Width Modulation (VS-PWM)
controller and SenseFET specifically designed for
offline Switch-Mode Power Supplies (SMPS) for valley
switching with minimal external components. The VS-
PWM controller includes an integrated 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
solutions, the FSQ510 can reduce total cost,
component count, size and weight; while simultaneously
increasing efficiency, productivity, and system reliability.
This device provides a platform for cost-effective designs
of a valley switching flyback converters.
Ordering Information
Part
Number
Package
Output Power Table⁽¹⁾
Operating
Junction
Temperature
Current
Limit
RDS(ON) 230 V_AC ± 15%⁽²⁾
(Max.)
Adapter⁽³⁾
Open
Frame⁽⁴⁾
85-265 VAC
Adapter⁽³⁾
Open
Frame⁽⁴⁾
FSQ510 7-DIP
-40 to +130°C 320 mA 32 Ω 5.5 W
9W
4W
6W
FSQ510MX 7-MLSOP
Packing
Method
Rail
Tape &
Reel
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
Notes:
1. The junction temperature can limit the maximum output power.
2. 230 VAC or 100/115 VAC with voltage doubler.
3. Typical continuous power with a Fairchild charger evaluation board described in this datasheet in a non-
ventilated, enclosed adapter housing, measured at 50°C ambient temperature.
4. Maximum practical continuous power for auxiliary power supplies in an open-frame design at 50°C ambient temperature.
© 2009 Fairchild Semiconductor Corporation
FSQ510 / FSQ510MX • Rev. 1.4.0
www.fairchildsemi.com