FAN7602N

Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High voltage startup - PWM controller for flyback converters - Built-in high-voltage MOSFET - Frequency jittering for EMI reduction - Auto-restart protection - Overload protection - Overvoltage protection - Over-temperature protection

Package: DIP-8, SOIC-8

Essence: The FAN7602N is a power management IC designed for use in flyback converters. It integrates a high-voltage startup circuit, a PWM controller, and various protection features into a single chip.

Packaging/Quantity: The FAN7602N is available in two package options - DIP-8 and SOIC-8. The quantity per package depends on the supplier.

Specifications

• Input Voltage Range: 9V to 38V
• Output Voltage Range: 5V to 24V
• Maximum Output Power: 25W
• Operating Frequency: 65kHz
• Startup Current: 100μA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The FAN7602N has 8 pins arranged as follows:

```

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| | --|1 2 3 |-- VCC --|4 5 6 |-- GND --|7 8 |-- FB |___________| ```

Pin Description: 1. VCC: Power supply input 2. GND: Ground 3. NC: No connection 4. GND: Ground 5. GND: Ground 6. NC: No connection 7. GND: Ground 8. FB: Feedback pin for output voltage regulation

Functional Features

1. High Voltage Startup: The FAN7602N can start up at high input voltages, making it suitable for a wide range of applications.
2. PWM Controller: It incorporates a pulse-width modulation (PWM) controller that regulates the output voltage of the flyback converter.
3. Built-in High-Voltage MOSFET: The IC includes a high-voltage MOSFET, eliminating the need for an external switch.
4. Frequency Jittering: The frequency jittering feature reduces electromagnetic interference (EMI) generated by the converter.
5. Auto-Restart Protection: In case of a fault or overload condition, the IC automatically restarts after a short delay.
6. Overload Protection: The FAN7602N provides protection against excessive load currents, preventing damage to the circuit.
7. Overvoltage Protection: It safeguards the system from voltage spikes or transients that could harm the connected devices.
8. Over-Temperature Protection: The IC monitors its own temperature and shuts down if it exceeds a safe operating limit.

Advantages and Disadvantages

Advantages: - Integrated design reduces component count and board space requirements. - Wide input voltage range allows for versatile applications. - Comprehensive protection features enhance system reliability. - Frequency jittering minimizes EMI emissions. - Auto-restart functionality improves fault tolerance.

Disadvantages: - Limited maximum output power of 25W may not be sufficient for high-power applications. - Only available in DIP-8 and SOIC-8 packages, limiting flexibility in PCB layout.

Working Principles

The FAN7602N operates as a flyback converter, which is a type of switched-mode power supply. It converts the input voltage into a regulated output voltage using a transformer and a high-voltage MOSFET. The PWM controller adjusts the duty cycle of the switching signal to regulate the output voltage. The IC incorporates various protection mechanisms to ensure safe and reliable operation.

Application Field Plans

The FAN7602N is commonly used in the following applications:

1. Power Adapters: It is suitable for designing power adapters used in consumer electronics, such as laptops, smartphones, and gaming consoles.
2. LED Lighting: The IC can be employed in LED driver circuits for efficient and reliable illumination systems.
3. Industrial Power Supplies: Its wide input voltage range and protection features make it suitable for industrial power supply applications.
4. Home Appliances: The FAN7602N can be utilized in power management circuits of home appliances like refrigerators, air conditioners, and washing machines.

Alternative Models

1. FAN7602: Similar to FAN7602N but without over-temperature protection.
2. FAN7602B: Enhanced version with additional features like burst mode operation and adjustable frequency.

Note: Please refer to the manufacturer's datasheet for detailed specifications and application guidelines.

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