ON Semiconductor
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FAN4802NY
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FAN4802NY

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High efficiency, low power consumption
  • Package: SOP-8 (Small Outline Package)
  • Essence: Voltage Mode PWM Controller
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 9V to 30V
  • Output Voltage Range: 0.8V to 24V
  • Maximum Duty Cycle: 100%
  • Operating Temperature Range: -40°C to 85°C
  • Switching Frequency: 200kHz to 1MHz
  • Output Current: Up to 2A

Detailed Pin Configuration

  1. VCC: Power supply input
  2. GND: Ground reference
  3. COMP: Compensation pin for loop stability
  4. FB: Feedback pin for output voltage regulation
  5. CS: Current sense pin for current limit protection
  6. SS/TR: Soft-start and shutdown control pin
  7. RT/CT: Timing resistor and capacitor connection pin
  8. OUT: Output voltage pin

Functional Features

  • Voltage mode control with adjustable output voltage
  • Internal oscillator for stable operation
  • Overcurrent protection with adjustable current limit
  • Soft-start function for controlled startup
  • Shutdown control for power saving
  • Error amplifier for precise voltage regulation
  • Built-in leading-edge blanking for improved noise immunity

Advantages and Disadvantages

Advantages: - High efficiency resulting in reduced power consumption - Wide input and output voltage range for versatile applications - Compact SOP-8 package for space-constrained designs - Adjustable current limit for enhanced protection

Disadvantages: - Limited maximum output current of 2A - Requires external timing components for frequency adjustment

Working Principles

The FAN4802NY is a voltage mode PWM controller used in power management applications. It operates by comparing the feedback voltage (FB) with an internal reference voltage to regulate the output voltage. The error amplifier amplifies the difference between these voltages and adjusts the duty cycle of the internal oscillator accordingly. This controls the switching of the power MOSFET, which in turn regulates the output voltage.

Detailed Application Field Plans

The FAN4802NY is commonly used in various power management applications, including but not limited to: - DC-DC converters - LED drivers - Battery chargers - Power supplies for consumer electronics - Industrial control systems

Detailed and Complete Alternative Models

  1. FAN4803NY: Similar specifications and features as FAN4802NY, but with an additional enable pin for enhanced control.
  2. FAN4804NY: Higher maximum output current of 4A, suitable for applications requiring higher power levels.
  3. FAN4805NY: Lower input voltage range of 4.5V to 18V, ideal for battery-powered devices.

These alternative models provide options based on specific requirements and can be considered as alternatives to the FAN4802NY.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق FAN4802NY في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of FAN4802NY in technical solutions:

  1. Q: What is FAN4802NY? A: FAN4802NY is a high-performance, synchronous rectifier controller IC used in power supply applications.

  2. Q: What is the purpose of FAN4802NY? A: FAN4802NY is designed to control the synchronous rectification MOSFETs in a power supply circuit, improving efficiency and reducing power losses.

  3. Q: What is synchronous rectification? A: Synchronous rectification is a technique that replaces traditional diode rectifiers with MOSFETs to reduce power losses in power supply circuits.

  4. Q: How does FAN4802NY improve power supply efficiency? A: FAN4802NY provides precise timing control for the synchronous rectification MOSFETs, minimizing conduction losses and improving overall power conversion efficiency.

  5. Q: What is the input voltage range supported by FAN4802NY? A: FAN4802NY supports an input voltage range from 4.5V to 28V, making it suitable for a wide range of power supply applications.

  6. Q: Can FAN4802NY handle high currents? A: Yes, FAN4802NY can handle high currents up to 30A, making it suitable for demanding power supply designs.

  7. Q: Does FAN4802NY have built-in protection features? A: Yes, FAN4802NY includes various protection features such as overcurrent protection, undervoltage lockout, and thermal shutdown to ensure safe operation.

  8. Q: Is FAN4802NY compatible with different types of MOSFETs? A: Yes, FAN4802NY is compatible with both N-channel and P-channel MOSFETs, providing flexibility in choosing the appropriate components for the application.

  9. Q: Can FAN4802NY be used in battery-powered applications? A: Yes, FAN4802NY can be used in battery-powered applications as long as the input voltage range and current requirements are within its specifications.

  10. Q: Are there any application notes or reference designs available for FAN4802NY? A: Yes, the manufacturer of FAN4802NY typically provides application notes and reference designs that can help engineers in implementing the IC effectively in their designs.