TOP252EN

Product Overview

Category: Integrated Circuit (IC)
Use: Power Management
Characteristics: High Efficiency, Low Standby Power, Wide Input Voltage Range
Package: PDIP-7, SMD-7C
Essence: Switching Power Supply Controller
Packaging/Quantity: Tube/50 pieces

Specifications

Input Voltage Range: 85VAC to 265VAC
Output Power: Up to 45W
Frequency Range: 50Hz to 60Hz
Operating Temperature Range: -40°C to +125°C
Efficiency: Up to 88%
Standby Power: Less than 100mW

Detailed Pin Configuration

VCC: Power Supply Voltage
GND: Ground
FB: Feedback Pin
COMP: Compensation Pin
CS: Current Sense Pin
DRAIN: Power MOSFET Drain Pin
SOURCE: Power MOSFET Source Pin

Functional Features

Primary-Side Regulation (PSR) Control
Frequency Jittering for EMI Reduction
Auto-Restart Protection
Over-Temperature Protection
Over-Voltage Protection
Under-Voltage Lockout (UVLO)

Advantages and Disadvantages

Advantages

High Efficiency leads to reduced power consumption
Wide Input Voltage Range allows for universal compatibility
Compact package size enables space-saving designs
Built-in protection features enhance system reliability

Disadvantages

Requires external components for complete power supply design
Limited output power compared to higher-end models
Not suitable for high-frequency applications

Working Principles

The TOP252EN is a switching power supply controller that utilizes primary-side regulation (PSR) control. It operates by modulating the duty cycle of the power MOSFET to regulate the output voltage. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle accordingly. The compensation pin (COMP) is used to stabilize the control loop and prevent oscillations. The current sense pin (CS) provides information about the load current, enabling accurate current limiting and protection.

Detailed Application Field Plans

The TOP252EN is commonly used in various applications, including:

AC/DC Power Supplies
LED Lighting
Set-Top Boxes
Audio Amplifiers
Industrial Controls

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the TOP252EN are:

TOP242EN
TOP249EN
TOP255EN
LNK302PN
UC3842B

These models offer similar functionality and can be suitable replacements depending on specific requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací TOP252EN v technických řešeních

Sure! Here are 10 common questions and answers related to the application of TOP252EN in technical solutions:

Q: What is TOP252EN? A: TOP252EN is a high-performance integrated switcher IC (integrated circuit) designed for offline power supplies.
Q: What are the key features of TOP252EN? A: The key features of TOP252EN include wide input voltage range, high efficiency, low standby power consumption, and built-in protection features.
Q: What is the typical application of TOP252EN? A: TOP252EN is commonly used in various applications such as AC/DC power supplies, LED lighting, industrial controls, and consumer electronics.
Q: How does TOP252EN achieve high efficiency? A: TOP252EN incorporates a highly efficient flyback topology along with advanced control techniques to minimize power losses and maximize overall efficiency.
Q: Can TOP252EN handle different input voltages? A: Yes, TOP252EN has a wide input voltage range, typically from 85VAC to 265VAC, making it suitable for global applications.
Q: Does TOP252EN provide any protection features? A: Yes, TOP252EN includes built-in protection features like overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown to ensure safe operation.
Q: Is TOP252EN suitable for low-power applications? A: Yes, TOP252EN has a low standby power consumption and can be optimized for low-power applications, making it energy-efficient.
Q: Can TOP252EN drive LEDs directly? A: No, TOP252EN is primarily designed for driving power supplies and requires additional circuitry to drive LEDs effectively.
Q: Are there any design resources available for TOP252EN? A: Yes, the manufacturer provides datasheets, application notes, and reference designs to assist in the design and implementation of TOP252EN-based solutions.
Q: What are the advantages of using TOP252EN in technical solutions? A: The advantages of using TOP252EN include high efficiency, compact size, reliable performance, and ease of integration, making it a popular choice for power supply applications.

Please note that the answers provided here are general and may vary depending on specific requirements and applications.