FSQ510_08 Datasheet, PDF (1/15 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch (FPS) for Valley Switching Converter - Low EMI and High Efficiency

September 2008
FSQ510, FSQ510H, and FSQ510M
Green Mode Fairchild Power Switch (FPS™)
for Valley Switching Converter – Low EMI and High Efficiency
Features
ƒ Uses an LDMOS Integrated Power Switch
ƒ Optimized for Valley Switching Converter (VSC)
ƒ Low EMI through Variable Frequency Control and
Inherent Frequency Modulation
ƒ High Efficiency through Minimum Drain Voltage
Switching
ƒ Extended Valley 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 Protection Functions: Overload Protection (OLP),
Internal Thermal Shutdown (TSD) with Hysteresis
ƒ Under-Voltage Lockout (UVLO) with Hysteresis
ƒ Internal Startup Circuit
ƒ Internal High-Voltage SenseFET: 700V
ƒ Built-in Soft-Start: 5ms
Applications
ƒ 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 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. 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.
© 2008 Fairchild Semiconductor Corporation
FSQ510, FSQ510H, and FSQ510M • Rev. 1.2.0
www.fairchildsemi.com