ON Semiconductor
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FAN4800IN
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FAN4800IN

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Power Consumption
  • Package: DIP-8 (Dual In-line Package with 8 pins)
  • Essence: Voltage Mode PWM Controller
  • Packaging/Quantity: Tube/50 pieces per tube

Specifications

  • Input Voltage Range: 10V to 30V
  • Output Voltage Range: 0.8V to 5.5V
  • Maximum Duty Cycle: 100%
  • Operating Temperature Range: -40°C to +85°C
  • Frequency Range: 100kHz to 500kHz
  • Current Limit Range: 0.5A to 2A

Detailed Pin Configuration

  1. VCC: Power Supply Input
  2. GND: Ground
  3. COMP: Compensation Pin for Feedback Loop
  4. CS: Current Sense Input
  5. FB: Feedback Pin
  6. RT/CT: Timing Components Connection
  7. SS/TR: Soft-Start and Shutdown Control
  8. OUT: Output Pin

Functional Features

  • Voltage Mode PWM Control
  • Adjustable Output Voltage
  • Overcurrent Protection
  • Soft-Start Functionality
  • Shutdown Control
  • Error Amplifier for Precise Regulation

Advantages and Disadvantages

Advantages: - High Efficiency - Wide Input Voltage Range - Adjustable Output Voltage - Compact DIP-8 Package - Overcurrent Protection

Disadvantages: - Limited Current Limit Range - Requires External Timing Components

Working Principles

The FAN4800IN is a voltage mode PWM controller used in power management applications. It operates by comparing the feedback voltage from the output with a reference voltage. Based on this comparison, it adjusts the duty cycle of the PWM signal to regulate the output voltage. The device incorporates an error amplifier, which ensures precise voltage regulation. It also features overcurrent protection to safeguard the circuit from excessive current flow.

Detailed Application Field Plans

The FAN4800IN is commonly used in various power management applications, including:

  1. DC-DC Converters: The IC can be employed in buck, boost, or buck-boost converters to efficiently regulate and convert DC voltages.
  2. LED Lighting: It can be utilized in LED drivers to control the brightness of LEDs by adjusting the output voltage.
  3. Battery Chargers: The FAN4800IN can be integrated into battery charging circuits to provide accurate voltage regulation during the charging process.
  4. Power Supplies: It finds application in general-purpose power supplies for electronic devices, ensuring stable and efficient power delivery.

Detailed and Complete Alternative Models

  1. LM2576: A popular alternative with similar specifications and functionality.
  2. LT1073: Another voltage mode PWM controller suitable for power management applications.
  3. UC3843: Widely used IC offering adjustable output voltage and comprehensive protection features.

These alternative models provide comparable performance and can be considered as substitutes for the FAN4800IN in various applications.

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기술 솔루션에 FAN4800IN 적용과 관련된 10가지 일반적인 질문과 답변을 나열하세요.

Sure! Here are 10 common questions and answers related to the application of FAN4800IN in technical solutions:

  1. Q: What is FAN4800IN? A: FAN4800IN is a high-performance, synchronous rectifier controller IC used in power supply applications.

  2. Q: What is the purpose of FAN4800IN in a power supply circuit? A: FAN4800IN is used to control the synchronous rectification process, improving efficiency and reducing power losses.

  3. Q: What is synchronous rectification? A: Synchronous rectification is a technique that replaces traditional diode rectifiers with actively controlled MOSFETs to minimize power losses.

  4. Q: How does FAN4800IN improve power supply efficiency? A: FAN4800IN optimizes the timing and control of the synchronous rectifiers, reducing conduction losses and improving overall efficiency.

  5. Q: Can FAN4800IN be used in both buck and boost converter designs? A: Yes, FAN4800IN can be used in both buck and boost converter designs, as well as in other types of power supply topologies.

  6. Q: What is the maximum input voltage supported by FAN4800IN? A: The maximum input voltage supported by FAN4800IN is typically around 100V.

  7. Q: Does FAN4800IN require an external gate driver for the synchronous rectifiers? A: No, FAN4800IN has built-in gate drivers, eliminating the need for external drivers.

  8. Q: Can FAN4800IN handle high-frequency switching applications? A: Yes, FAN4800IN is designed to operate at high switching frequencies, making it suitable for various power supply designs.

  9. Q: What are the key features of FAN4800IN? A: Some key features of FAN4800IN include adjustable dead-time control, overcurrent protection, and thermal shutdown.

  10. Q: Are there any application notes or reference designs available for FAN4800IN? A: Yes, the manufacturer provides application notes and reference designs that can help in implementing FAN4800IN in different technical solutions.

Please note that the specific details and answers may vary depending on the manufacturer's documentation and specifications for FAN4800IN.