TOP257YN

The TOP257YN is a high-voltage integrated circuit designed for switch-mode power supplies (SMPS). It combines a high-voltage power MOSFET and a control circuit in a single package, making it ideal for low to medium power applications, such as adapters, battery chargers, and lighting systems. Operating in a current mode, it features primary-side regulation, eliminating the need for an opto-isolator, which simplifies the design and reduces cost.
The device supports a wide input voltage range, typically from 85 to 265 VAC, allowing it to be used in various global applications. It incorporates built-in protection features like over-voltage protection, over-current protection, and thermal shutdown, enhancing reliability and safety. The TOP257YN is available in a compact DIP-8 package, facilitating easy integration into PCB layouts. Its efficiency and compact design make it suitable for applications requiring a small footprint without compromising performance.

The TOP257YN is a high-voltage integrated circuit designed for power supply applications. Key features include:
1. Integrated Power MOSFET: It includes a high-voltage power MOSFET that simplifies design and reduces component count.
2. Wide Input Voltage Range: Supports input voltages from 85V to 265V, making it suitable for various applications, including AC-DC converters.
3. Constant Current Control: Offers a constant current output feature, ideal for driving LED loads and similar applications.
4. Overload Protection: Incorporates built-in protection mechanisms such as overload protection, thermal shutdown, and output short-circuit protection to enhance reliability.
5. Low Standby Power: Designed for low standby power, which helps improve energy efficiency.
6. Frequency Modulation: Features frequency modulation to minimize transformer size and optimize performance.
7. Simple Design: Enables easy implementation with minimal external components, facilitating faster time-to-market.
Overall, the TOP257YN is a versatile choice for designers seeking efficiency and reliability in high-voltage power supply systems.

The TOP257YN is packaged in a DIP-8 (Dual In-Line Package) format. This type of package features eight pins arranged in two rows, making it suitable for through-hole mounting on printed circuit boards.

The TOP257YN is a power integrated circuit (IC) designed for flyback converters. It features a total of 8 pins. The pin functions are as follows:
1. Pin 1 - VDD: Supply voltage pin.
2. Pin 2 - GND: Ground pin.
3. Pin 3 - Drain (D): Connected to the drain of the internal power MOSFET.
4. Pin 4 - Source (S): Connected to the source of the internal power MOSFET.
5. Pin 5 - Feedback (FB): Feedback input for voltage regulation.
6. Pin 6 - Control (CT): Controls the on/off operation of the device.
7. Pin 7 - Auxiliary (AUX): Provides auxiliary feedback for startup and regulation.
8. Pin 8 - Comp (COMP): Compensation pin for feedback loop stability.
The TOP257YN is primarily used in compact, cost-effective power supply designs, offering features like built-in over-voltage protection and internal soft start.

The TOP257YN is manufactured by Power Integrations, Inc., a company known for its innovations in high-performance analog and mixed-signal integrated circuits. Power Integrations specializes in providing energy-efficient solutions for power conversion, with a focus on applications in LED lighting, consumer electronics, and industrial equipment. The company is recognized for its commitment to reducing energy consumption and improving the efficiency of power supplies. Founded in 1985, Power Integrations operates globally, serving a diverse range of markets and maintaining a strong emphasis on research and development to advance power management technologies.

The TOP257YN is a high-voltage power switch used in applications such as AC-DC power supplies, LED drivers, and consumer electronics. It is ideal for offline power converters, providing features like integrated PWM control, over-voltage protection, and low standby power consumption. Its efficiency and compact design make it suitable for chargers, appliances, and industrial equipment.

The TOP257YN chip, a power integrated circuit, has several equivalent products, including the TOPSwitch series such as TOP254YN, TOP256YN, and TOP258YN. Alternatives from other manufacturers may include the NCP1200 series from ON Semiconductor and the LNK series from Power Integrations. Always verify specific parameters and applications to ensure compatibility.