FAN7621N

Overview

Product Category

FAN7621N belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in power supply systems, particularly in switch-mode power supplies (SMPS), where it plays a crucial role in regulating and controlling the power flow.

Characteristics

• FAN7621N is a highly efficient and reliable IC that offers excellent performance in power management applications.
• It operates at a wide input voltage range, making it suitable for various power supply designs.
• The IC incorporates advanced protection features such as overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.
• It is designed to provide stable and accurate output voltage regulation, ensuring the proper functioning of the power supply system.

Package and Quantity

FAN7621N is available in a compact and industry-standard package, such as a 16-pin dual in-line package (DIP). It is typically sold in reels or tubes containing a specific quantity, usually around 250 units per reel.

Specifications

• Input Voltage Range: 10V - 20V
• Output Voltage Range: 3V - 15V
• Maximum Output Current: 2A
• Operating Temperature Range: -40°C to 85°C
• Package Type: 16-pin DIP

Pin Configuration

The detailed pin configuration of FAN7621N is as follows:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VCC | Power Supply Voltage Input | | 2 | GND | Ground | | 3 | FB | Feedback Input for Voltage Regulation | | 4 | COMP | Compensation Pin for Stability Control | | 5 | CS | Current Sense Input | | 6 | VREF | Reference Voltage Output | | 7 | RT/CT | Timing Components Connection | | 8 | CT | Timing Capacitor Connection | | 9 | OSC | Oscillator Frequency Control | | 10 | SS | Soft-Start Control | | 11 | SD | Shutdown Control | | 12 | OVP | Overvoltage Protection Input | | 13 | OCP | Overcurrent Protection Input | | 14 | INV | Inverting Input for Error Amplifier | | 15 | COMP | Compensation Pin for Stability Control | | 16 | HV | High-Voltage Power Supply |

Functional Features

• FAN7621N incorporates a high-voltage startup circuit, enabling it to operate directly from the rectified AC line voltage.
• It includes an error amplifier that compares the feedback voltage with the reference voltage and adjusts the duty cycle of the PWM (Pulse Width Modulation) signal accordingly.
• The IC features a built-in oscillator that generates the necessary timing signals for controlling the power supply system.
• It offers soft-start functionality, gradually ramping up the output voltage to prevent excessive inrush current during startup.
• FAN7621N provides comprehensive protection features such as overvoltage and overcurrent protection, ensuring the safety and reliability of the power supply system.

Advantages and Disadvantages

Advantages

• High efficiency and reliability in power management applications.
• Wide input voltage range allows for versatile power supply designs.
• Advanced protection features enhance system safety.
• Compact package size facilitates easy integration into various electronic devices.

Disadvantages

• Limited maximum output current may restrict its use in high-power applications.
• Requires external timing components for proper operation.

Working Principles

FAN7621N operates based on the principles of pulse width modulation (PWM). It generates a PWM signal that controls the switching of power transistors, regulating the output voltage of the power supply. The feedback loop continuously compares the actual output voltage with the desired reference voltage, adjusting the duty cycle of the PWM signal to maintain stable and accurate voltage regulation.

Application Field Plans

FAN7621N finds extensive application in various power supply systems, including: - AC-DC converters - LED drivers - Battery chargers - Industrial power supplies - Consumer electronics

Alternative Models

Some alternative models that offer similar functionality to FAN7621N include: - FAN7602: A lower-power variant suitable for low-current applications. - FAN7625: Provides higher maximum output current for more demanding power supply designs. - FAN7626: Offers additional features such as frequency hopping for improved electromagnetic interference (EMI) performance.

In conclusion, FAN7621N is a highly efficient and reliable integrated circuit designed for power management applications. Its wide input voltage range, advanced protection features, and compact package make it suitable for various power supply designs. While it has some