FSQ500L_09 Datasheet, PDF (1/12 Pages) Fairchild Semiconductor – Compact, Green Mode, Fairchild Power Switch

February 2009
FSQ500L
Compact, Green Mode, Fairchild Power Switch (FPS™)
Features
ƒ Single Chip 700V SenseFET Power Switch
ƒ Precision Fixed Operating Frequency: 130kHz
ƒ No-load consumption 250mW at 265VAC with
Burst Mode and Down to 60mW with External Bias
ƒ Internal Startup Switch
ƒ Soft-Start Time Tuned by External Capacitor
ƒ Under-Voltage Lockout (UVLO) with Hysteresis
ƒ Pulse-by-Pulse Current Limit
ƒ Overload Protection (OLP) and Internal Thermal
Shutdown Function (TSD) with Hysteresis
ƒ Auto-Restart Mode
ƒ 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
ƒ Cost-Effective Linear Power Supplies Replacement
ƒ Charger and Adapter for Mobile Phone, PDA, MP3,
and Cordless Phone
Related Application Notes
ƒ AN-4137, AN-4141, AN-4147,AN-6075 (Flyback)
ƒ AN-4138 (Charger)
Maximum Output Power⁽¹⁾
230Vac ± 15%⁽²⁾
85-265V_AC
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
-40°C to +85°C
Eco Status
RoHS
Package
4-Lead, Small Outline
Package (SOT223-4L)
Packing Method
Tape & Reel
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2008 Fairchild Semiconductor Corporation
FSQ500L • Rev. 1.0.1
www.fairchildsemi.com