TNY254GN-TL

The TNY254GN-TL is a compact and highly efficient off-line switcher IC targeted at low to moderate power applications (<7.5W), including telecommunications and consumer electronics. Featuring Power Integrations’ EcoSmart(TM) energy-efficiency optimization technology, it is ideal for applications that require a robust and energy-efficient alternative to linear supplies.

TNY254GN-TL Application Field

The TNY254GN-TL target applications include but are not limited to the following:

• Telecommunications – It can be used for low-power, residential VoIP adapters.
• Consumer Electronics – It can be used for low-power, personal audio/video productssuch as MP3 players and digital cameras.
• Internet-of-Things/Industrial Automation – It can be used for low-power, IoT-oriented or motion control applications such as PLCs and motor controllers.

The TNY254GN-TL is designed to meet the demanding performance and energy efficiency requirements of modern communication, consumer and industrial electronics applications, including:

• High Efficiency – The TNY254GN-TL has a typical efficiency of 85%, allowing for low power dissipation and improved overall system efficiency.
• Small Solution Size – The TNY254GN-TL is a small SOP-8 device with integrated features, allowing for easy integration into space-constrained designs.
• Low Temperature Rise – The TNY254GN-TL has a low ground current, minimizing temperature rise as well as thermal energy dissipation.
• Wide Input Voltage Range – The TNY254GN-TL provides a wide input voltage range of 80VAC to 305VAC, giving it design flexibility compared to other solutions.
• High Conversion Efficiency – The TNY254GN-TL has a typical efficiency of 85%, allowing for improved overall system efficiency.
• Integrated Protection – The TNY254GN-TL features integrated protection features such as over voltage, over current, and short circuit, making it robust and reliable.

TNY254GN-TL Working Principle

The TNY254GN-TL’s works on the principle of power conversion from AC power to DC power. In this conversion process, voltage transformation, rectification and filtering, and DC regulation are all performed within the device. Figure 1 illustrates the working principle of the TNY254GN-TL.

Figure 1. TNY254GN-TL Working Principle

The TNY254GN-TL combines an EcoSmart Flyback topology, with an integrated startup circuit together with an optimized primary-side control, allowing it to be easily designed into an isolated flyback without requiring the use of an optocoupler or an auxiliary winding. The integrated circuit seamlessly combines the power switch, the power supply controller, the oscillator, and a wide range of protection features, making for an extremely compact design.

The TNY254GN-TL’s startup section drives the oscillator capacitance to begin oscillation, setting up the circuit and allowing the output voltage to begin rising. As current flows through the oscillator capacitor, it charges and the frequency of oscillation increases. As the output voltage begins to increase, the output voltage feedback is coupled to the power supply controller and optically-isolated bi-directional feedback is provided to the primary side of the circuit. This feedback loop is used to maintain the output voltage, allowing for very tight regulation across a wide range of line and load conditions.

The TNY254GN-TL also integrates several protection features to ensure safe and reliable operation of the device. These include Over Voltage Protection (OVP), Over Current Protection (OCP), Short Circuit Protection (SCP), and Thermal Shutdown Protection (TSD).

Conclusion

The TNY254GN-TL is a cost-effective and highly integrated off-line switcher IC targeted at low to moderate power applications. Its combination of high efficiency and integrated protection features makes it an ideal solution for a variety of applications that require a robust, energy efficient alternative to conventional linear supplies.