UCC3976PW

Product Overview

Category

UCC3976PW belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications.

Characteristics

• UCC3976PW is a high-performance, synchronous buck controller.
• It operates at a wide input voltage range and provides efficient power conversion.
• The IC offers various protection features such as overvoltage, undervoltage, and overcurrent protection.
• It has a built-in soft-start function for smooth power-up.

Package

UCC3976PW is available in a standard 20-pin TSSOP package.

Essence

The essence of UCC3976PW lies in its ability to regulate and control the output voltage efficiently in power management systems.

Packaging/Quantity

UCC3976PW is typically sold in reels containing 250 units per reel.

Specifications

• Input Voltage Range: 4.5V to 60V
• Output Voltage Range: 0.8V to 55V
• Maximum Output Current: 10A
• Switching Frequency: Up to 1MHz
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

1. VIN: Input voltage pin
2. PGND: Power ground pin
3. BOOT: Bootstrap capacitor connection pin
4. SW: Switch node connection pin
5. COMP: Compensation pin
6. FB: Feedback voltage pin
7. EN: Enable pin
8. SS/TR: Soft-start/tracking pin
9. VREF: Reference voltage pin
10. AGND: Analog ground pin
11. RT/CLK: Oscillator timing resistor/clock synchronization pin
12. SYNC: External synchronization pin
13. SS/TR: Soft-start/tracking pin
14. VSENSE+: Positive current sense input pin
15. VSENSE-: Negative current sense input pin
16. OCSET: Overcurrent protection threshold setting pin
17. UVLO: Undervoltage lockout pin
18. OVLO: Overvoltage lockout pin
19. SS/TR: Soft-start/tracking pin
20. VCC: Supply voltage pin

Functional Features

1. Wide Input Voltage Range: UCC3976PW can handle a wide range of input voltages, making it suitable for various applications.
2. High Efficiency: The synchronous buck controller design ensures efficient power conversion, minimizing energy losses.
3. Protection Mechanisms: The IC incorporates overvoltage, undervoltage, and overcurrent protection features to safeguard the system.
4. Soft-Start Function: The built-in soft-start function allows for a gradual increase in output voltage during power-up, preventing voltage spikes.

Advantages and Disadvantages

Advantages

• Wide input voltage range enables versatile application possibilities.
• High efficiency leads to reduced power consumption.
• Comprehensive protection mechanisms enhance system reliability.
• Soft-start function prevents voltage spikes, ensuring stable operation.

Disadvantages

• Limited maximum output current may restrict usage in high-power applications.
• Higher cost compared to non-synchronous buck controllers.

Working Principles

UCC3976PW operates as a synchronous buck controller, regulating the output voltage by controlling the duty cycle of the internal power switches. It uses a feedback mechanism to compare the actual output voltage with the desired value and adjusts the duty cycle accordingly. By switching the power switches at a high frequency, it achieves efficient power conversion.

Detailed Application Field Plans

UCC3976PW finds applications in various fields, including: 1. Industrial automation systems 2. Telecommunications equipment 3. Automotive electronics 4. Power supplies for consumer electronics 5. Renewable energy systems

Detailed and Complete Alternative Models

1. UCC3975PW: Similar to UCC3976PW, but with a lower maximum output current of 5A.
2. UCC3977PW: Similar to UCC3976PW, but with a higher maximum output current of 15A.
3. UCC3978PW: Similar to UCC3976PW, but with additional features such as adjustable switching frequency.

(Note: The above alternative models are suggestions and may not represent an exhaustive list.)

In conclusion, UCC3976PW is a high-performance synchronous buck controller IC designed for efficient power management applications. With its wide input voltage range, comprehensive protection mechanisms, and built-in soft-start function, it offers advantages in terms of versatility, efficiency, and system reliability. However, its limited maximum output current and relatively higher cost should be considered when selecting the appropriate solution for specific applications.