Part Number: TOP248YN

Manufacturer: Power Integrations


Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us


In the world of power management, efficiency, reliability, and cost-effectiveness are important things that engineers and designers must think about when making cutting-edge electronic products. The TOPSwitch-GX series has gotten a lot of attention for how well it works, and the TOP248YN is a star model in this series. In this detailed guide, we’ll talk about TOP248YN’s many features, benefits, and uses. The TOP248YN is a flexible integrated power management solution with a variety of functions that aim to improve design freedom, energy efficiency, and overall system performance.

Understanding the TOP248YN

TOP248YN is a member of the TOPSwitch-GX family. It uses the same design as its predecessor, TOPSwitch, which has been proven to work well. On a single CMOS chip, it combines a high-voltage power MOSFET, fault safety, PWM control, and other control circuitry. This integration saves a lot of money and makes the planning process easier, which makes it a good choice for many applications.

Advanced Functions for Enhanced Performance

The TOP248YN has a number of advanced features that make it stand out from other power management options. Depending on the type of box, there are either one or three extra pins that can do the following:

  • Line Sensing: The TOP248YN has Over-Voltage (OV) and Under-Voltage (UV) safety, line feed-forward, and DCMAX reduction. These features help control the voltage coming into the system and improve its performance.
  • Accurate Current Limit Set From the Outside: This feature gives you accurate control over the current limit, which protects the power components and the load better.
  • Remote ON/OFF: Engineers can turn the device on and off from a distance, which improves the total control and efficiency of the system.
  • Synchronization to an External Lower Frequency: The TOP248YN can match its switching frequency to an external lower frequency, which can be useful in some situations.
  • Frequency Selection (132 kHz/66 kHz): Depending on the needs of the system, engineers can choose between two switching frequencies (132 kHz or 66 kHz).

Transparent Features for Optimal Performance

The TOP248YN has a number of clear features that improve performance without needing the user to do anything extra:

  • Soft-Start: The soft-start feature makes sure that the motor starts up slowly and smoothly, putting less stress on the parts and avoiding sudden current surges.
  • Automatically Adjusting Switching Frequency: By default, the device has a switching frequency of 132 kHz, which is automatically lowered when there are few loads. This function saves more energy when the device is running on low power.
  • Frequency Jittering: The TOP248YN greatly reduces Electromagnetic Interference (EMI) by using frequency jittering techniques. This helps it meet strict regulatory standards.
  • Wider DCMAX: The device has a wider DCMAX (maximum duty cycle) range, which gives designers more freedom and lets them work with different loads.
  • Hysteretic Thermal Shutdown: The built-in thermal shutdown keeps the device from getting too hot, making it safe and reliable.
  • Larger Creepage Packages: The TOP248YN is offered in packages with larger creepage distances, which improves safety and reliability in high-voltage applications.

Simplified Design and Optimal System Cost

The TOP248YN is made to make building easier and reduce the cost of the whole system. Critical parameters like current limit, frequency, and PWM gain have tighter temperatures and absolute tolerances. This makes the design simpler and makes sure that the device works the same way no matter what the working conditions are.

TOPSwitch-GX Technology

Evolution from TOPSwitch to TOPSwitch-GX

TOPSwitch-GX is the next step up from TOPSwitch, which has been very popular. TOPSwitch, which stood for “Transitional Overshoot Process Switch,” was an innovative power integration solution that put power MOSFET, PWM control, and fault safety on a single chip. But as new technologies came out and people wanted better speed and performance, it became necessary to improve the technology that was already there.

TOPSwitch-GX is the next-generation version. It builds on the successful topology of TOPSwitch and adds a lot of new features and changes. The goal of these changes was to give designers and engineers more design freedom, better speed, and more energy efficiency, all in a package that was easy on the wallet.

Integration of Power MOSFET, PWM Control, and Fault Protection on a CMOS Chip

The CMOS (Complementary Metal-Oxide-Semiconductor) chip is the heart of the TOPSwitch-GX technology. It combines several important parts onto a single chip. The main parts that work together are:

  • MOSFET: The power MOSFET The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) is a key switching element that controls the flow of current efficiently during the power conversion process.
  • How PWM Works: By changing the length of the switching waves, Pulse Width Modulation (PWM) control can be used to control the output voltage or current. This control device makes sure that the load gets the right amount of power.
  • Protection from faults: The TOPSwitch-GX has strong fault protection features that keep the power system and its parts safe from dangers like overcurrent, overvoltage, and high temperatures. For the system to be safe and work well in the long run, these safeguards are important.

By putting these important parts on a single chip, the design process is sped up, the need for extra parts is reduced, and the total power management solution is made easier. This single-chip integration is very helpful because it saves room, improves thermal performance, and simplifies the system.

Advantages of Single-Chip Integration in Terms of Design and Cost-Effectiveness

  • Simplified Design: Putting multiple parts on a single chip makes the whole process of designing easier for engineers. They no longer have to figure out how to connect each individual part, which saves them time and effort when designing.
  • Space and cost savings: TOPSwitch-GX’s single-chip design saves important board space by getting rid of the need for discrete components on the outside. Also, since it has fewer parts, it costs less to make, making it a good choice for apps that care about cost.
  • Improved Reliability: Fewer external links mean less chance of signal interference and fewer places where something could go wrong. The power management system is more reliable because it is made from a single chip.
  • Better thermal performance: When components are put on the same chip, thermal paths are optimized. This makes it easier for heat to leave the system and improves system efficiency.
  • Better Performance and Efficiency: The combined design of TOPSwitch-GX means that switching losses are kept to a minimum and the efficiency of power conversion is improved. This means that the system uses less power and performs better overall.

The TOPSwitch-GX technology is a big step up from the TOPSwitch technology that came before it. The combination of a power MOSFET, PWM control, and fault protection on a single CMOS chip offers many benefits in terms of design simplicity, cost-effectiveness, and improved system performance, making it an ideal choice for modern power management solutions.


The versatility of the TOP248YN makes it suitable for a wide range of applications, including but not limited to:

  • Switched-Mode Power Supplies (SMPS)
  • LED Lighting
  • Home Appliances
  • Industrial Controls
  • Consumer Electronics


As part of the TOPSwitch-GX line, the TOP248YN is an efficient and cost-effective power management solution that combines multiple functions onto a single CMOS chip. The TOP248YN is a great choice for many electronic apps because it has advanced features, clear performance optimization, and a simpler design process. Engineers and designers who want an integrated power control solution with high reliability and the lowest possible system cost should look into what the TOP248YN has to offer.

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