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FAN4800CUN
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FAN4800CUN

Product Overview

Category

FAN4800CUN belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power supply applications.

Characteristics

  • FAN4800CUN is a high-performance, current-mode PWM controller.
  • It operates at a frequency range of 100kHz to 500kHz.
  • The IC offers precise control over output voltage and current.
  • It provides protection features such as overvoltage and overcurrent protection.

Package

FAN4800CUN is available in a compact and industry-standard 8-pin SOIC package.

Essence

The essence of FAN4800CUN lies in its ability to regulate and control power supply outputs efficiently and accurately.

Packaging/Quantity

The IC is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

  • Input Voltage Range: 10V to 30V
  • Output Voltage Range: 0V to 5V
  • Operating Frequency: 100kHz to 500kHz
  • Maximum Duty Cycle: 50%
  • Operating Temperature Range: -40°C to +85°C
  • Supply Current: 3mA (typical)

Detailed Pin Configuration

  1. VCC: Power supply input pin.
  2. GND: Ground reference pin.
  3. COMP: Compensation pin for feedback loop stability.
  4. CS: Current sense input pin.
  5. FB: Feedback input pin.
  6. RT/CT: Timing resistor/capacitor connection pin.
  7. SS: Soft-start capacitor connection pin.
  8. OUT: Output pin.

Functional Features

  • Current-mode control for improved line and load regulation.
  • Adjustable output voltage and current limits.
  • Overvoltage protection (OVP) and overcurrent protection (OCP) features.
  • Soft-start function for controlled startup and reduced inrush current.
  • Error amplifier with high gain and low offset voltage.

Advantages and Disadvantages

Advantages

  • High-performance PWM controller for precise power supply regulation.
  • Wide input voltage range allows flexibility in various applications.
  • Protection features ensure safe operation and prevent damage to the circuitry.
  • Compact package size enables space-saving designs.

Disadvantages

  • Limited maximum duty cycle may restrict certain applications requiring higher duty cycles.
  • Operating temperature range may not be suitable for extreme environments.

Working Principles

FAN4800CUN operates on the principle of current-mode control, where the output voltage is regulated by monitoring the current flowing through the power supply. By adjusting the duty cycle of the PWM signal, the IC maintains a stable output voltage despite variations in input voltage or load conditions. The error amplifier compares the feedback voltage with a reference voltage to generate the necessary control signals.

Detailed Application Field Plans

FAN4800CUN finds application in various power supply systems, including but not limited to: - Switching power supplies - DC-DC converters - LED drivers - Battery chargers

Detailed and Complete Alternative Models

  1. FAN4800CUNR: Similar to FAN4800CUN, but with an extended operating temperature range (-40°C to +125°C).
  2. FAN4800CUNX: Enhanced version with additional protection features like short-circuit protection and thermal shutdown.

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

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací FAN4800CUN v technických řešeních

Sure! Here are 10 common questions and answers related to the application of FAN4800CUN in technical solutions:

  1. Q: What is FAN4800CUN? A: FAN4800CUN is a high-performance, current-mode PWM controller designed for offline and DC-DC converter applications.

  2. Q: What are the key features of FAN4800CUN? A: The key features of FAN4800CUN include precise current sensing, adjustable frequency operation, soft-start function, and overvoltage protection.

  3. Q: What is the typical input voltage range for FAN4800CUN? A: The typical input voltage range for FAN4800CUN is between 8V and 30V.

  4. Q: Can FAN4800CUN be used in both AC-DC and DC-DC converter applications? A: Yes, FAN4800CUN can be used in both AC-DC and DC-DC converter applications.

  5. Q: How does FAN4800CUN provide overvoltage protection? A: FAN4800CUN provides overvoltage protection by monitoring the output voltage and shutting down the PWM control when it exceeds a certain threshold.

  6. Q: What is the maximum switching frequency supported by FAN4800CUN? A: The maximum switching frequency supported by FAN4800CUN is typically 500kHz.

  7. Q: Does FAN4800CUN have built-in short-circuit protection? A: No, FAN4800CUN does not have built-in short-circuit protection. External circuitry may be required for short-circuit protection.

  8. Q: Can FAN4800CUN operate in continuous or discontinuous mode? A: FAN4800CUN can operate in both continuous and discontinuous mode, depending on the application requirements.

  9. Q: What is the recommended operating temperature range for FAN4800CUN? A: The recommended operating temperature range for FAN4800CUN is typically -40°C to +85°C.

  10. Q: Are there any evaluation boards or reference designs available for FAN4800CUN? A: Yes, Fairchild Semiconductor provides evaluation boards and reference designs for FAN4800CUN to help with its application in various technical solutions.

Please note that these answers are general and may vary depending on the specific application and requirements. It's always recommended to refer to the datasheet and consult with the manufacturer for detailed information.