TOP245P

Product Overview

Category: Integrated Circuit (IC)
Use: Power Management
Characteristics: High-performance offline switcher, integrated control and power MOSFET, compact package, high efficiency, low standby power, wide input voltage range.
Package: TO-220
Essence: Offline Switcher IC
Packaging/Quantity: Tube packaging, 50 pieces per tube.

Specifications

Input Voltage Range: 85VAC to 265VAC
Output Power: Up to 45W
Switching Frequency: 132 kHz
Operating Temperature Range: -40°C to +150°C
Protection Features: Overload protection, overvoltage protection, thermal shutdown, auto-restart.

Detailed Pin Configuration

The TOP245P has a 7-pin configuration:

VSENSE: Current sense input for the primary side controller.
FB: Feedback pin for output voltage regulation.
GND: Ground reference for the IC.
DRAIN: High-voltage power MOSFET drain connection.
SOURCE: High-voltage power MOSFET source connection.
VCC: Supply voltage for the IC.
BP/MODE: Bootstrap capacitor connection and mode selection pin.

Functional Features

Integrated control and power MOSFET in a single package.
Primary-side control eliminates the need for an optocoupler.
Frequency jittering reduces EMI emissions.
Auto-restart feature for fault protection.
Built-in protection features ensure safe operation.

Advantages and Disadvantages

Advantages: - Compact size and high integration. - High efficiency and low standby power consumption. - Wide input voltage range allows for global compatibility. - Built-in protection features enhance system reliability.

Disadvantages: - Limited output power compared to higher-rated devices. - Requires external components for complete power supply design.

Working Principles

The TOP245P is an offline switcher IC that operates in a flyback topology. It uses primary-side control, where the controller senses the current flowing through the primary winding of the transformer to regulate the output voltage. The integrated power MOSFET switches the primary current on and off, transferring energy to the secondary side through the transformer. The feedback loop adjusts the duty cycle of the switching waveform to maintain the desired output voltage.

Detailed Application Field Plans

The TOP245P is commonly used in various applications, including:

AC/DC Power Supplies: Provides efficient power conversion for low to medium power applications such as adapters, chargers, and LED lighting.
Home Appliances: Used in power supplies for appliances like TVs, set-top boxes, audio systems, and white goods.
Industrial Equipment: Suitable for power management in industrial automation, motor drives, and control systems.
Automotive Electronics: Can be utilized in automotive power supplies and battery chargers.

Detailed and Complete Alternative Models

Some alternative models to the TOP245P include:

TOP246P: Similar specifications and features, but with a different pin configuration.
LNK304PN: Offline switcher IC with similar characteristics and package type.
UC3842: PWM controller IC suitable for offline power supplies.
NCP1200P60: Integrated PWM controller for offline flyback converters.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van TOP245P in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of TOP245P in technical solutions:

Q: What is TOP245P? A: TOP245P is a highly integrated offline switcher IC (integrated circuit) that is commonly used in power supply applications.
Q: What are the main features of TOP245P? A: The main features of TOP245P include high efficiency, low standby power consumption, built-in protection features, and wide input voltage range.
Q: What is the typical application of TOP245P? A: TOP245P is typically used in various power supply applications such as AC/DC converters, LED drivers, battery chargers, and industrial power supplies.
Q: What is the maximum output power that TOP245P can handle? A: The maximum output power that TOP245P can handle depends on the specific design and external components used, but it can typically handle power levels up to several hundred watts.
Q: How does TOP245P achieve high efficiency? A: TOP245P achieves high efficiency through its integrated MOSFET switch, which minimizes power losses, and its ability to operate in different modes like frequency foldback and burst mode.
Q: What are the key protection features of TOP245P? A: The key protection features of TOP245P include overvoltage protection (OVP), overcurrent protection (OCP), thermal shutdown, and undervoltage lockout (UVLO).
Q: Can TOP245P operate with both high and low input voltages? A: Yes, TOP245P has a wide input voltage range and can operate with both high and low input voltages, typically ranging from 85VAC to 265VAC.
Q: Is TOP245P suitable for universal input applications? A: Yes, TOP245P is commonly used in universal input applications where the power supply needs to be compatible with different input voltages and frequencies.
Q: Can TOP245P be used in isolated or non-isolated power supply designs? A: Yes, TOP245P can be used in both isolated and non-isolated power supply designs depending on the specific requirements of the application.
Q: Are there any reference designs or application notes available for TOP245P? A: Yes, the manufacturer of TOP245P provides reference designs and application notes that can help engineers in implementing the IC in their technical solutions.

Please note that the answers provided here are general and may vary depending on the specific application and design considerations. It is always recommended to refer to the datasheet and application notes provided by the manufacturer for detailed information.