FSQ500N

FSQ500N Datasheet

FSQ500N Green Mode Fairchild Power Switch FPS

Part	Datasheet
FSQ500N	FSQ500N (pdf)

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FSQ500N Green Mode Fairchild Power Switch FPS October 2009 FSQ500N Green Mode Fairchild Power Switch FPS Single-Chip 700V SenseFET Power Switch Precision Fixed Operating Frequency 130kHz No-Load Consumption 250mW at 265VAC with Burst Mode 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 The FSQ500N is specially designed for low cost, small set-top box, DSL, home appliance auxiliary power supplies. This device combines a 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 FSQ500N reduces total size and weight, while increasing efficiency, productivity, and system reliability. This device provides a basic platform for cost-effective flyback converters. STB and DSL Power Supply Home Appliance, IH Cooker, Auxiliary Power Supply Related Resources AN-4137-Design Guidelines for Off-line Flyback Converters using FPS AN-4141-Troubleshooting and Design Tips for Fairchild Power Switch FPStm Flyback Applications AN-4147-Design Guidelines for RCD Snubber of Flyback AN6075- Flyback -AN-6075-Compact Green- Mode Adapter Using FSQ500L for Low Cost Maximum Output Power 1 230VAC ± 15% 2 85-265VAC Adapter 3 Open Frame 4 Adapter 3 Open Frame 4 4.0W 6.5W 3.5W 5.5W Notes The junction temperature can limit the maximum output power. 230VAC or 100/115VAC with doubler. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient. Maximum practical continuous power in an open frame design at 50°C ambient. Ordering Information Operating Temperature Range FSQ500N -40°C to +85°C Eco Status Package 8-Lead, Molded Dual Inline Package MDIP , JEDEC MS-001, Inch Wide Packing Method Rail For Fairchild’s definition of Eco Status, please visit: FSQ500N Green Mode Fairchild Power Switch FPS Application Circuit Diagram AC IN Drain VCC GND DC OUT Figure Typical Application Circuit Internal Block Diagram Figure Internal Block Diagram 2009 Fairchild Semiconductor Corporation FSQ500N Green Mode Fairchild Power Switch FPS Pin Configuration NC VCC VFB GND 8-DIP Drain NC GND Figure Package / Pin Diagram Pin Definitions Pin # 1 4, 5, 6 7 8 Name NC No connection This pin is connected to a storage capacitor. A high-voltage regulator connected between pin 8 VSTR and this pin provides the supply voltage to the FSQ500N at startup and when switching during normal operation. The FSQ500N eliminates the need for auxiliary bias winding and associated external components. This pin is internally connected to the non-inverting input of the PWM comparator. The collector of an opto-coupler is typically tied to this pin. For stable operation, a capacitor should be placed between this pin and GND. If the voltage of this pin reaches 4.5V, the overload protection triggers, which shuts down the FPS. GND This pin is the control ground and the SenseFET source. NC No connection Drain High-voltage power SenseFET drain connection 2009 Fairchild Semiconductor Corporation

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FSQ500N Green Mode Fairchild Power Switch FPS

October 2009

FSQ500N Green Mode Fairchild Power Switch FPS

Single-Chip 700V SenseFET Power Switch Precision Fixed Operating Frequency 130kHz No-Load Consumption 250mW at 265VAC with

Burst Mode

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

The FSQ500N is specially designed for low cost, small set-top box, DSL, home appliance auxiliary power supplies. This device combines a 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 FSQ500N reduces total size and weight, while increasing efficiency, productivity, and system reliability. This device provides a basic platform for cost-effective flyback converters.

STB and DSL Power Supply Home Appliance, IH Cooker, Auxiliary Power

Supply

Related Resources

AN-4137-Design Guidelines for Off-line Flyback

Converters using FPS

AN-4141-Troubleshooting and Design Tips for

Fairchild Power Switch FPStm Flyback Applications

AN-4147-Design Guidelines for RCD Snubber of

Flyback

AN6075- Flyback -AN-6075-Compact Green-

Mode Adapter Using FSQ500L for Low Cost

Maximum Output Power 1
230VAC ± 15% 2
85-265VAC

Adapter 3

Open Frame 4

Adapter 3

Open Frame 4
4.0W
6.5W
3.5W
5.5W

Notes The junction temperature can limit the maximum
output power. 230VAC or 100/115VAC with doubler. Typical continuous power in a non-ventilated
enclosed adapter measured at 50°C ambient. Maximum practical continuous power in an open
frame design at 50°C ambient.
Ordering Information

Operating Temperature Range

FSQ500N
-40°C to +85°C

Eco Status

Package
8-Lead, Molded Dual Inline Package MDIP , JEDEC MS-001, Inch Wide

Packing Method

Rail

For Fairchild’s definition of Eco Status, please visit:

FSQ500N Green Mode Fairchild Power Switch FPS

Application Circuit Diagram

AC IN

Drain

VCC GND

DC OUT

Figure Typical Application Circuit

Internal Block Diagram

Figure Internal Block Diagram
2009 Fairchild Semiconductor Corporation

FSQ500N Green Mode Fairchild Power Switch FPS

Pin Configuration

NC VCC VFB GND
8-DIP

Drain NC GND

Figure Package / Pin Diagram

Pin Definitions

Pin # 1
4, 5, 6 7 8

Name

NC No connection

This pin is connected to a storage capacitor. A high-voltage regulator connected between pin 8

VSTR and this pin provides the supply voltage to the FSQ500N at startup and when switching during normal operation. The FSQ500N eliminates the need for auxiliary bias winding and
associated external components.

This pin is internally connected to the non-inverting input of the PWM comparator. The collector of
an opto-coupler is typically tied to this pin. For stable operation, a capacitor should be placed between this pin and GND. If the voltage of this pin reaches 4.5V, the overload protection triggers,
which shuts down the FPS.

GND This pin is the control ground and the SenseFET source.

NC No connection

Drain High-voltage power SenseFET drain connection
2009 Fairchild Semiconductor Corporation

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived FSQ500N Datasheet file may be downloaded here without warranties.

Datasheet ID: FSQ500N 515536