UCC3802DG4

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance current mode PWM controller
• Package: SOIC-8
• Essence: Regulates and controls power delivery in various applications
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 7.6V to 30V
• Output Voltage Range: 0V to 5.1V
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: 50kHz to 1MHz
• Duty Cycle Range: 0% to 100%
• Maximum Output Current: 500mA
• Error Amplifier Bandwidth: 10kHz
• Soft Start Time: 10ms

Detailed Pin Configuration

1. COMP: Compensation pin for error amplifier
2. FB: Feedback pin for output voltage regulation
3. CS: Current sense input pin
4. GND: Ground reference pin
5. VREF: Reference voltage output pin
6. RT/CT: Timing resistor/capacitor connection pin
7. SS/TR: Soft start/timing capacitor discharge pin
8. VCC: Supply voltage input pin

Functional Features

• Current Mode Control: Provides excellent line and load regulation
• Adjustable Frequency: Allows optimization for different applications
• Soft Start Function: Prevents excessive inrush current during startup
• Overcurrent Protection: Safeguards against excessive output current
• Under-Voltage Lockout: Ensures proper operation under low voltage conditions
• Error Amplifier: Provides precise voltage regulation

Advantages and Disadvantages

Advantages: - High-performance current mode control - Wide input voltage range - Adjustable frequency for flexibility - Comprehensive protection features - Compact SOIC-8 package

Disadvantages: - Limited maximum output current - Relatively low error amplifier bandwidth

Working Principles

The UCC3802DG4 is a high-performance current mode PWM controller designed for power management applications. It operates by comparing the feedback voltage (FB) with the reference voltage (VREF) to generate an error signal. This error signal is then amplified and used to control the duty cycle of the output waveform, regulating the power delivered to the load.

The current mode control ensures excellent line and load regulation, making it suitable for various power supply designs. The adjustable frequency feature allows optimization for different applications, balancing efficiency and component size. The soft start function prevents excessive inrush current during startup, protecting the system components. Comprehensive protection features such as overcurrent protection and under-voltage lockout enhance the reliability of the power delivery.

Detailed Application Field Plans

The UCC3802DG4 is widely used in power management applications, including but not limited to:

1. Switching Power Supplies: Provides efficient and regulated power conversion for various electronic devices.
2. LED Lighting: Controls the brightness and intensity of LEDs in lighting systems.
3. Motor Control: Regulates the speed and torque of motors in industrial and automotive applications.
4. Battery Charging: Manages the charging process of batteries in portable devices and electric vehicles.
5. Audio Amplifiers: Ensures stable power delivery to audio amplification circuits.

Detailed and Complete Alternative Models

1. UCC2802DG4: Similar functionality with a wider input voltage range.
2. UCC3803DG4: Enhanced version with additional protection features.
3. UCC3804DG4: Higher output current capability with improved error amplifier bandwidth.

These alternative models provide options based on specific requirements and design considerations.

In conclusion, the UCC3802DG4 is a high-performance current mode PWM controller that offers precise power management capabilities. Its adjustable frequency, comprehensive protection features, and compact package make it suitable for a wide range of applications in various industries.