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FSQ500L Datasheet, PDF (1/12 Pages) Fairchild Semiconductor – Compact, Green Mode, Fairchild Power Switch (FPS™) | |||
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September 2008
FSQ500L
Compact, Green Mode, Fairchild Power Switch (FPSâ¢)
Features
 Single Chip 700V SenseFET Power Switch
 Precision Fixed Operating Frequency: 130kHz
 No-load consumption 250mW at 265VAC with
Burst Mode and Down to 60mW with External Bias
 Internal Startup Switch
 Soft-Start Time Tuned by External Capacitor
 Under-Voltage Lockout (UVLO) with Hysteresis
 Pulse-by-Pulse Current Limit
 Overload Protection (OLP) and Internal Thermal
Shutdown Function (TSD) with Hysteresis
 Auto-Restart Mode
 No Need for Auxiliary Bias Winding
Description
The FSQ500L is specially designed for a replacement
of linear power supplies with low cost. This device
combines current-mode Pulse Width Modulator (PWM)
with a senseFET. The integrated PWM controller
features include: a fixed oscillator, Under Voltage
Lockout (UVLO) protection, Overload Protection (OLP),
Leading-Edge Blanking (LEB), an optimized gate turn-
on/turn-off driver, Thermal Shutdown (TSD) protection
with hysteresis, and temperature-compensated
precision-current sources for loop compensation. When
compared to a linear power supply, the FSQ500L
device reduces total size and weight, while increasing
efficiency, productivity, and system reliability. This
device provides a basic platform for cost-effective
flyback converters.
Applications
 Cost-Effective Linear Power Supplies Replacement
 Charger and Adapter for Mobile Phone, PDA, MP3,
and Cordless Phone
Related Application Notes
 AN-4137, AN-4141, AN-4147 (Flyback)
 AN-4138 (Charger)
Maximum Output Power(1)
230Vac ± 15%(2)
85-265VAC
Adapter(3)
Open
Frame(4)
Adapter(3)
Open
Frame(4)
2.5W
3.0W
2.0W
2.5W
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.
Ordering Information
Part Number
Operating
Temperature Range
FSQ500L
-25°C to +85°C
Eco Status
RoHS
Package
4-Lead, Small Outline
Package (SOT223-4L)
Packing Method
Tape & Reel
For Fairchildâs definition of âgreenâ Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2008 Fairchild Semiconductor Corporation
FSQ500L ⢠Rev. 1.0.0
www.fairchildsemi.com
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