FAN4803CS1X

Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - High-performance voltage mode controller - Designed for offline and DC-to-DC converter applications - Provides precise regulation of output voltage - Offers protection features for enhanced reliability

Package: CSOP-8

Essence: The FAN4803CS1X is a voltage mode PWM controller that is widely used in various power supply applications. It offers high performance and precise regulation of the output voltage, making it suitable for both offline and DC-to-DC converter designs.

Packaging/Quantity: The FAN4803CS1X is available in a CSOP-8 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 10V to 30V
• Output Voltage Range: 0.8V to 5.0V
• Maximum Duty Cycle: 100%
• Operating Temperature Range: -40°C to +85°C
• Frequency Range: 50kHz to 500kHz
• Current Limit: Adjustable

Detailed Pin Configuration

The FAN4803CS1X has the following 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 control
6. RT/CT: Timing resistor/capacitor connection for frequency control
7. SS: Soft-start pin for controlled startup
8. OUT: Output pin for driving external power devices

Functional Features

• Voltage mode control with adjustable current limit
• Overvoltage protection (OVP) and undervoltage lockout (UVLO)
• Soft-start function for controlled startup
• Error amplifier with high gain and bandwidth for precise regulation
• Adjustable frequency range for flexible design

Advantages and Disadvantages

Advantages: - High-performance voltage mode control for accurate output regulation - Wide input voltage range allows for versatile applications - Protection features enhance system reliability - Compact CSOP-8 package for space-constrained designs

Disadvantages: - Limited output voltage range (0.8V to 5.0V) - Requires external components for complete power supply design

Working Principles

The FAN4803CS1X operates on the principle of voltage mode control, where the output voltage is regulated by comparing it with a reference voltage. The error amplifier amplifies the difference between the feedback voltage and the reference voltage, which is then used to adjust the duty cycle of the PWM signal. This controls the power delivered to the load and maintains the desired output voltage.

Detailed Application Field Plans

The FAN4803CS1X finds extensive use in various power supply applications, including but not limited to: - Offline power supplies - DC-to-DC converters - Battery chargers - LED drivers - Industrial power systems

Detailed and Complete Alternative Models

• FAN4800CS1X
• FAN4801CS1X
• FAN4802CS1X
• FAN4804CS1X
• FAN4805CS1X

These alternative models offer similar functionality and can be considered as substitutes for the FAN4803CS1X depending on specific requirements.

In conclusion, the FAN4803CS1X is a high-performance voltage mode PWM controller that provides precise regulation of output voltage in various power supply applications. Its compact size, protection features, and adjustable parameters make it a popular choice among designers.