UCC3888N - English Editing Encyclopedia Entry

Product Overview

Category

UCC3888N belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications.

Characteristics

• UCC3888N is a high-performance voltage mode PWM controller.
• It operates at a wide input voltage range, making it suitable for various power supply designs.
• The IC offers excellent line and load regulation, ensuring stable output voltages.
• It provides protection features such as overvoltage, undervoltage, and overcurrent protection.
• UCC3888N has a low startup current, enabling efficient power management.

Package and Quantity

The UCC3888N IC is available in a standard 16-pin SOIC (Small Outline Integrated Circuit) package. It is typically sold in reels containing a quantity of 250 units.

Specifications

• Input Voltage Range: 4.5V to 75V
• Output Voltage Range: 0.8V to 60V
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: Adjustable up to 1MHz
• Maximum Duty Cycle: 90%
• Quiescent Current: 2.5mA

Pin Configuration

The UCC3888N IC has the following pin configuration:

Pin 1: VFB - Feedback Voltage Input Pin 2: COMP - Compensation Node Pin 3: CS - Current Sense Input Pin 4: GND - Ground Pin 5: RT/CT - Timing Components Connection Pin 6: SS/TR - Soft Start/Tracking Control Pin 7: VCC - Supply Voltage Input Pin 8: DRVH - High-Side Gate Drive Output Pin 9: DRVL - Low-Side Gate Drive Output Pin 10: SYNC - Synchronization Input Pin 11: FB/SD - Feedback/Sleep Mode Control Pin 12: VSENSE - Voltage Sense Input Pin 13: UVLO - Undervoltage Lockout Input Pin 14: OVLO - Overvoltage Lockout Input Pin 15: EN/UV - Enable/Undervoltage Lockout Output Pin 16: VIN - Input Voltage

Functional Features

• Voltage mode PWM control for precise regulation.
• Adjustable switching frequency for optimization.
• Soft start and tracking control for smooth startup.
• Comprehensive protection features ensure system reliability.
• High-side and low-side gate drive outputs for efficient power delivery.
• Synchronization input for multi-phase operation.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows versatile applications.
• Excellent line and load regulation for stable output voltages.
• Protection features enhance system safety and reliability.
• Low startup current enables efficient power management.

Disadvantages

• Limited maximum duty cycle may restrict certain applications.
• Requires external timing components for operation.

Working Principles

The UCC3888N operates on the principle of voltage mode pulse-width modulation (PWM) control. It compares the feedback voltage with a reference voltage to generate an error signal, which is then used to adjust the duty cycle of the PWM waveform. By regulating the duty cycle, the IC controls the output voltage to maintain it at the desired level. The soft start feature gradually ramps up the output voltage during startup, preventing excessive inrush current. The various protection features ensure the system remains safe under abnormal operating conditions.

Application Field Plans

The UCC3888N IC finds extensive use in various power management applications, including: - DC-DC converters - Power supplies - Battery charging systems - LED drivers - Industrial automation equipment

Alternative Models

For those seeking alternatives to the UCC3888N, the following ICs offer similar functionality: - LM5117 - LT3845 - TPS54332

These alternative models can be considered based on specific application requirements and availability.

In conclusion, the UCC3888N is a high-performance voltage mode PWM controller widely used in power management applications. Its excellent regulation, protection features, and wide input voltage range make it suitable for diverse design requirements.

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