TNY268PN Switcher: Symbol, Features, Manufacturer and Applications
20 October 2023
Ⅰ. Overview of TNY268PN switcher
Ⅱ. TNY268PN symbol, footprint and pin configuration
Ⅲ. Technical parameters of TNY268PN switcher
Ⅳ. What are the features of TNY268PN switcher?
Ⅴ. Manufacturer of TNY268PN switcher
Ⅵ. What are the applications of TNY268PN switcher?
Ⅶ. Test circuit of TNY268PN switcher
Ⅷ. How does TNY268PN switcher achieve energy saving?
TNY268PN is an enhanced energy-saving low-power offline switch in an 8-pin DIP package. It combines a 700V power MOSFET, current limiting function, high-voltage switching current source, oscillator and thermal shutdown circuitry into a highly integrated device. It eliminates the need for a bias winding and associated circuitry and derives startup and operating power directly from the drain pin. In addition, TinySwitch-II devices offer features such as auto-restart, line undervoltage detection, and frequency jittering, making them a versatile choice for power management needs.
Replacement and equivalent:
• TOP221PN
• TOP223PN
• TNY266PN
TNY268PN has a total of 8 pins. Its pin names and descriptions are as follows:
Pin 1 (BP): Connection point for a 0.1 uF external bypass capacitor for the internally generated 5.8 V supply.
Pin 2 (S): Control circuit common, internally connected to output MOSFET source.
Pin 3 (S): Control circuit common, internally connected to output MOSFET source.
Pin 4 (EN/UV): This pin has dual functions: enable input and line undervoltage sense. During normal operation, switching of the power MOSFET is controlled by this pin. MOSFET switching is terminated when a current greater than 240 uA is drawn fromthis pin.This pin also senses line undervoltage conditions through an extemal resistor connected to the DC line voltage. lf there is no external resistor connected to this pin, TinySwitch-ll detects its absence and disables the line undervoltage function.
Pin 5 (D): Power MOSFET drain connection. Provides internal operatingcurrent for both start-up and steady-state operation.
Pin 7 (S(HV RT)): Power MOSFET high voltage source return pins
Pin 8 (S(HV RT)): Power MOSFET high voltage source return pins
1. EcoSmart®- extremely energy efficient
When there is no bias winding, the no-load power consumption of TNY268PN is less than 250mW under 265VAC input; when there is a bias winding, the no-load power consumption is less than 50mW. It is very suitable for mobile phone chargers and PC standby applications, allowing users to have a better experience.
2. High performance at low cost
TNY268PN has many excellent properties, such as fast switching turn-on, no overshoot, and current-limited operation. These features effectively suppress line frequency fluctuations, while built-in current limiting and thermal protection mechanisms improve overall safety.
3. Better cost/performance over RCC & linears
The TNY268PN offers a cost-effective and compact alternative to traditional large linear power supplies. It boasts a lower overall system cost compared to RCC, discrete PWM, and other integrated or hybrid solutions. Additionally, it employs straightforward on or off control, eliminating the necessity for loop compensation and bias windings. This simplifies the design and reduces costs.
4. TinySwitch-II features reduce system costs.
The TNY268PN incorporates a programmable under-voltage detection feature that efficiently safeguards against power on or off issues, eliminating the need for additional external components. It also boasts a fully integrated auto-restart function that effectively shields against short circuits and open-loop faults, resulting in reduced reliance on external components. Furthermore, its integrated circuitry significantly diminishes the audible noise associated with conventional paint-impregnated transformers, thus lowering electromagnetic interference and diminishing the necessity for electromagnetic interference filter components.
Founded in 1988, Power Integrations, Inc. is a semiconductor company specializing in the design, development and sale of analog and mixed-signal integrated circuits (ICs), and other electronic components for high-voltage power conversion.
All of Power Integrations' product offerings share a common feature: the incorporation of discrete electronic components into specialized integrated circuit (IC) chips. This approach offers numerous benefits, such as reducing the number of components required, expediting the design process, and enhancing energy efficiency and reliability. The company holds a prominent position in several major power supply sectors, including energy conservation, renewable energy, light-emitting diodes, electric vehicles, and the Internet of Things.
• LED lighting: In LED lighting applications, TNY268PN can be used to design LED driving power supplies to ensure efficient energy management and stable power output.
• Servers and data centers: Servers and data centers require large amounts of power to run. In order to reduce energy consumption, many companies are looking for more efficient and stable power supplies. The TNY268PN is a high-performance power supply that can meet the demand. Not only does it have stable and efficient performance, it can also effectively reduce energy consumption and bring more sustainable data center solutions to enterprises.
• Medical equipment: Medical imaging, medical monitoring, portable medical equipment and other fields have high requirements on power supply reliability. Because TNY268PN has high integration, high reliability and other characteristics, it performs well in medical instrument applications.
• Consumer electronics: It is also used in various consumer electronic products such as TVs, game consoles, audio systems and home appliances to provide power management and power conversion functions.
• Industrial automation: For various equipment and systems in the industrial field, such as sensor power supply, industrial motor control and PLC (programmable logic controller) systems, we can also use TNY268PN to provide the required power supply.
Note: This test circuit is not suitable for current limit or output characteristics measurements.
First of all, TNY268PN integrates a line undervoltage detection function, which can prevent power on/off failures, improve the stability and reliability of the power supply, and further reduce energy consumption.
Secondly, TNY268PN adopts frequency dithering technology, which can greatly reduce electromagnetic interference (EMI), thereby reducing electromagnetic interference to the power supply and improving the efficiency of the power supply.
In addition, TNY268PN adopts an automatic restart circuit design, which can safely limit the output power in the event of output short circuit or open loop failure, reducing the number of components and secondary feedback circuit costs, which can also help reduce energy consumption.
Finally, it integrates a 700V power MOSFET, oscillator, high-voltage switching current source, current limit and thermal shutdown circuitry, allowing startup and operating power to come directly from the voltage on the DRAIN pin, eliminating the need for additional bias windings and associated circuitry, thereby reducing energy consumption.
