UC2902DG4

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance power supply controller
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Regulates and controls power supply in various applications
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Input Voltage Range: 8V to 40V
• Output Voltage Range: 5V to 20V
• Maximum Output Current: 1.5A
• Operating Temperature Range: -40°C to 85°C
• Supply Voltage: 4.5V to 40V
• Quiescent Current: 10mA

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground reference
3. COMP: Compensation pin for feedback control
4. FB: Feedback voltage input
5. RT/CT: Timing components connection pins
6. CT: Timing capacitor connection pin
7. RT: Timing resistor connection pin
8. OSC: Oscillator timing capacitor connection pin
9. SS/TR: Soft-start and tracking control pin
10. OUT: Power supply output

Functional Features

• Wide input voltage range allows for versatile applications
• Adjustable output voltage provides flexibility
• Overcurrent protection ensures safe operation
• Soft-start feature prevents excessive inrush current
• Error amplifier with compensation pin for stable feedback control
• Built-in oscillator for precise timing control

Advantages

• High-performance power regulation
• Wide operating temperature range
• Compact SOIC package for space-constrained designs
• Robust overcurrent protection for enhanced reliability
• Efficient soft-start feature for smooth power-up

Disadvantages

• Limited maximum output current of 1.5A
• Requires external timing components for precise operation

Working Principles

The UC2902DG4 is a power supply controller IC that regulates and controls the output voltage of a power supply. It operates by comparing the feedback voltage (FB) with a reference voltage to generate an error signal. This error signal is then amplified and fed back to the compensation pin (COMP), which adjusts the duty cycle of the internal oscillator. The adjusted duty cycle controls the switching frequency of the power supply, ensuring stable and regulated output voltage.

Detailed Application Field Plans

The UC2902DG4 is widely used in various applications where precise power supply regulation is required. Some common application fields include: - Switching power supplies - Battery chargers - LED drivers - Industrial automation systems - Automotive electronics

Detailed and Complete Alternative Models

1. UC3902DG4: Similar functionality with enhanced overcurrent protection
2. UC1902DG4: Lower maximum output current but more compact package size
3. UC5902DG4: Higher maximum output current for demanding applications

(Note: These alternative models are provided as examples and may not cover all available options in the market.)

This entry provides a comprehensive overview of the UC2902DG4 power supply controller IC. It includes basic information, specifications, pin configuration, functional features, advantages, disadvantages, working principles, application field plans, and alternative models.