Specifications
| Attribute | Value |
| Package / Case | Tube |
| Series | TOPSwitch®-GX |
| Part Status | Not For New Designs |
| Output Isolation | Isolated |
| Internal Switch(s) | Yes |
| Voltage - Breakdown | 700V |
| Topology | Flyback |
| Duty Cycle | 66.8% |
| Frequency - Switching | 66kHz ~ 132kHz |
| Power (Watts) | 205 W |
| Fault Protection | Current Limiting, Over Temperature, Over Voltage |
| Control Features | Frequency Control |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Supplier Device Package | TO-220-7C |
Overview
Description
The TOP248YN is a member of the TOPSwitch-HX family, a series of integrated circuits designed for use in power supply applications. It combines a high-voltage power MOSFET with a controller on a single chip, simplifying the design of efficient and reliable power supplies. The device is suitable for a wide range of applications, including adapters, chargers, and offline power supplies for consumer electronics, industrial, and other devices.
Key features of the TOP248YN include a built-in start-up current source, frequency jittering for reduced EMI, and a wide range of protection features such as over-temperature, over-current, and over-voltage protections. The high level of integration reduces component count, which leads to smaller, more cost-effective power supply designs. Additionally, the device supports both fixed and variable frequency operation to optimize efficiency across load ranges.
The TOP248YN is often chosen for its ability to meet stringent efficiency and thermal performance requirements while maintaining a simplified design process, making it a popular choice among power supply designers.
Key features of the TOP248YN include a built-in start-up current source, frequency jittering for reduced EMI, and a wide range of protection features such as over-temperature, over-current, and over-voltage protections. The high level of integration reduces component count, which leads to smaller, more cost-effective power supply designs. Additionally, the device supports both fixed and variable frequency operation to optimize efficiency across load ranges.
The TOP248YN is often chosen for its ability to meet stringent efficiency and thermal performance requirements while maintaining a simplified design process, making it a popular choice among power supply designers.
Equivalent
The TOP248YN is a member of the TOPSwitch-GX series from Power Integrations. Equivalent products include other models from the same series, such as the TOP247YN and TOP249YN. Additionally, you might consider similar switch-mode power supply (SMPS) ICs from different manufacturers, but ensure they match the electrical specifications, power ratings, and features of the TOP248YN. Always check datasheets to confirm compatibility.
Features
The TOP248YN is a member of the TOPSwitch-GX family of integrated circuits, designed for use in power supply applications. Here are some key features:
1. Integrated Solution: It combines a high-voltage power MOSFET with a controller, reducing the need for external components.
2. Efficient Switching: Provides high efficiency through its multi-mode operation, which includes a cycle skipping mode for low-load conditions to reduce power consumption.
3. Current Limit: It has user-selectable current limit values, allowing for flexibility in design.
4. Thermal Shutdown: Features thermal shutdown protection to prevent overheating, enhancing reliability.
5. Frequency Jittering: Reduces electromagnetic interference (EMI) by spreading the energy across a range of frequencies.
6. Built-in Soft-Start: Gradually increases the duty cycle during start-up to prevent output voltage overshoot.
7. Wide Range of Operation: Supports a wide input voltage range, suitable for global power supply applications.
8. Auto-Restart: Provides auto-restart for short-circuit protection and reduces the risk of damage to the power supply.
9. Simple Design: Simplifies circuit design and reduces overall cost due to fewer external components.
These features make the TOP248YN suitable for applications requiring efficient, reliable power supplies with minimal component count.
1. Integrated Solution: It combines a high-voltage power MOSFET with a controller, reducing the need for external components.
2. Efficient Switching: Provides high efficiency through its multi-mode operation, which includes a cycle skipping mode for low-load conditions to reduce power consumption.
3. Current Limit: It has user-selectable current limit values, allowing for flexibility in design.
4. Thermal Shutdown: Features thermal shutdown protection to prevent overheating, enhancing reliability.
5. Frequency Jittering: Reduces electromagnetic interference (EMI) by spreading the energy across a range of frequencies.
6. Built-in Soft-Start: Gradually increases the duty cycle during start-up to prevent output voltage overshoot.
7. Wide Range of Operation: Supports a wide input voltage range, suitable for global power supply applications.
8. Auto-Restart: Provides auto-restart for short-circuit protection and reduces the risk of damage to the power supply.
9. Simple Design: Simplifies circuit design and reduces overall cost due to fewer external components.
These features make the TOP248YN suitable for applications requiring efficient, reliable power supplies with minimal component count.
Pinout
The TOP248YN is a member of the TOPSwitch-GX family from Power Integrations, designed for use in high-efficiency off-line switch-mode power supplies. It typically comes in a TO-220 package and features a 7-pin configuration.
Here's a concise breakdown of the pin functions:
1. CONTROL (C): This pin serves as the input to the control circuitry, managing the duty cycle and providing startup and feedback functions.
2. SOURCE (S): These are typically multiple pins (3) that are internally connected and serve as the primary return path for the device, providing a connection to the source of the integrated MOSFET.
3. DRAIN (D): This pin connects directly to the power MOSFET's drain, handling the high-voltage switching.
4. BYPASS (BP): This pin is used to connect an external bypass capacitor, facilitating the internal supply voltage.
5. FREQUENCY (F): This pin allows setting the switching frequency and can be connected to an external resistor for frequency jittering to reduce EMI.
The TOP248YN supports efficient power conversion with integrated features like over-voltage protection, under-voltage lockout, and thermal shutdown.
Here's a concise breakdown of the pin functions:
1. CONTROL (C): This pin serves as the input to the control circuitry, managing the duty cycle and providing startup and feedback functions.
2. SOURCE (S): These are typically multiple pins (3) that are internally connected and serve as the primary return path for the device, providing a connection to the source of the integrated MOSFET.
3. DRAIN (D): This pin connects directly to the power MOSFET's drain, handling the high-voltage switching.
4. BYPASS (BP): This pin is used to connect an external bypass capacitor, facilitating the internal supply voltage.
5. FREQUENCY (F): This pin allows setting the switching frequency and can be connected to an external resistor for frequency jittering to reduce EMI.
The TOP248YN supports efficient power conversion with integrated features like over-voltage protection, under-voltage lockout, and thermal shutdown.
Manufacturer
The TOP248YN is manufactured by Power Integrations, Inc. Power Integrations is a semiconductor company that specializes in the design and development of high-performance electronic components for power conversion. The company is known for its focus on energy-efficient technologies and provides solutions for a wide range of applications, including power supplies, chargers, and LED lighting. Power Integrations' products are used in consumer electronics, communications, industrial, and automotive applications, among others. The TOP248YN, specifically, is part of the TOPSwitch series, which is typically used in power supply design for its efficiency and reliability.
Application
The TOP248YN is a high-performance integrated circuit used in power supply applications. It is commonly applied in off-line switch-mode power supplies, including AC-DC converters, adapters, and chargers. Its efficient power management makes it suitable for consumer electronics, industrial systems, and smart appliances. The TOP248YN features features like high efficiency, low standby power, and reduced electronic component count, making it ideal for energy-efficient designs. Additionally, it is used in LED lighting, battery chargers, and motor control systems where compact and efficient power conversion is required.
Package
The TOP248YN is a type of integrated circuit (IC) that comes in a TO-220 package. This package type is commonly used for power semiconductors due to its ability to handle more power and provide efficient heat dissipation.
