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FSQ510_09 Datasheet, PDF (1/15 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch | |||
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January 2009
FSQ510, FSQ510H, and FSQ510M
Green Mode Fairchild Power Switch (FPSâ¢)
for Valley Switching Converter â 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: 700V
 Built-in Soft-Start: 5ms
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 (H or M) 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 (H or M) 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
Output Power Table (1)
Package
Eco
Status
Operating
Junction
Temperature
Current
Limit
RDS(ON)
(MAX)
230VAC ± 15%(2)
Adapter(3)
Open
Frame(4)
85-265VAC
Adapter(3)
Open
Frame(4)
Replaces
Devices
FSQ510 7-DIP
FSD210B
FSQ510H 8-DIP RoHS -40 to +130°C 320mA 32Ω 5.5W
9W
4W
6W FSD210DH
FSQ510M 7-MLSOP
FSD210BM
For Fairchildâs definition of âgreenâ 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. 230VAC or 100/115VAC 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, FSQ510H, and FSQ510M ⢠Rev. 1.3.0
www.fairchildsemi.com
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