TOP244F

Duty Cycle:	66.5%
Mounting Type:	Through Hole
Supplier Device Package:	TO-262-7C
Package / Case:	TO-262-7 (Formed Leads), 6 Leads
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	Frequency Control
Fault Protection:	Current Limiting, Over Temperature, Over Voltage
Power (Watts):	65W
Frequency - Switching:	66kHz ~ 132kHz
Series:	TOPSwitch®-GX
Voltage - Supply (Vcc/Vdd):	--
Topology:	Flyback
Voltage - Breakdown:	700V
Internal Switch(s):	Yes
Output Isolation:	Isolated
Part Status:	Obsolete
Packaging:	Tube

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Introduction to TOP244F

The TOP244F is an Off-Line Quasi-Resonant Switching Regulator from Power Integrations. It is primarily used for low power off-line applications, such as LED lighting and AC adapters. The TOP244F is the first Energy Star qualified Quasi-Resonant Flyback device, providing a cost-effective solution for high-efficiency power converters.

Application Fields of TOP244F

The TOP244F is primarily used as a power supply in AC/DC converter and other offline switcher applications. It is also widely used in LED lighting applications, due to its high efficiency and low power dissipation. Additionally, the TOP244F is often used in computer peripherals, such as monitors and external hard drives. It is even used in some higher power systems, such as laser printers and medical equipment.Being highly efficient, the TOP244F helps maintain a high power factor in the circuit and minimizes power losses, making it an ideal choice for energy-saving applications. Additionally, the device is rated to operate for more than two million hours before failure, further reducing maintenance costs and increasing the life of the circuit.

Working Principle of TOP244F

The TOP244F switching regulator follows a quasi-resonant flyback topology. This topology is advantageous for low power offline applications, as it maintains a high power factor and allows for the switching of alternating current. In a typical circuit, the current is rectified from alternation current to direct current, then passed through the flyback transformer. The output is then regulated by the switching on and off of the MOSFET inside the TOP244F.The switching of the MOSFET is controlled by the internal oscillator inside the TOP244F, which is frequency-modulated depending on the output voltage. This allows for a wide range of input and output voltages, making the TOP244F an ideal choice for many applications.

Conclusion

The TOP244F is an Off-Line Quasi-Resonant Switching Regulator from Power Integrations. It is primarily used for low power off-line applications, such as LED lighting and AC adapters. It is also widely used in computer peripherals, such as monitors and external hard drives. The TOP244F is highly efficient and helps maintain a high power factor in the circuit, as it follows a quasi-resonant flyback topology and is frequency-modulated depending on the output voltage. These characteristics make the TOP244F an ideal choice for AC/DC converter and other offline switcher applications.

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