UCC3813N-1

Product Overview

Category

UCC3813N-1 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications.

Characteristics

• UCC3813N-1 is a high-performance voltage mode PWM controller.
• It operates at a fixed frequency and provides precise regulation of output voltage.
• The device offers excellent line and load regulation, making it suitable for various power supply designs.
• It features an internal oscillator, soft-start capability, and overcurrent protection.

Package

UCC3813N-1 is available in a standard 8-pin dual in-line package (DIP).

Essence

The essence of UCC3813N-1 lies in its ability to regulate voltage efficiently and reliably in power management applications.

Packaging/Quantity

UCC3813N-1 is typically packaged in reels or tubes, with quantities varying depending on the supplier. Common packaging options include 2500 units per reel or 50 units per tube.

Specifications

• Input Voltage Range: 4.5V to 16V
• Output Voltage Range: 0.8V to 12V
• Operating Temperature Range: -40°C to +85°C
• Maximum Duty Cycle: 100%
• Oscillator Frequency: 100kHz to 500kHz
• Quiescent Current: 6mA

Detailed Pin Configuration

1. COMP: Compensation pin for external compensation network.
2. FB: Feedback pin for regulating the output voltage.
3. CS: Current sense pin for monitoring the output current.
4. GND: Ground reference for the IC.
5. VREF: Reference voltage output for external components.
6. RT/CT: Timing resistor and capacitor connection pins for setting the oscillator frequency.
7. SS: Soft-start pin for controlling the startup behavior.
8. VCC: Supply voltage input for the IC.

Functional Features

• Voltage mode PWM control with fixed frequency operation.
• Precise regulation of output voltage.
• Internal oscillator eliminates the need for external timing components.
• Soft-start capability for controlled startup.
• Overcurrent protection for enhanced reliability.

Advantages and Disadvantages

Advantages

• Excellent line and load regulation.
• Wide input and output voltage ranges.
• Compact 8-pin package for space-constrained designs.
• Integrated overcurrent protection enhances system reliability.

Disadvantages

• Limited maximum duty cycle may restrict certain applications.
• Requires external compensation network for stability.

Working Principles

UCC3813N-1 operates on the principle of voltage mode pulse-width modulation (PWM). It compares the feedback voltage from the output with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the PWM signal, which regulates the output voltage. The internal oscillator sets the switching frequency, ensuring precise regulation. Soft-start functionality gradually ramps up the output voltage during startup, preventing excessive inrush current.

Detailed Application Field Plans

UCC3813N-1 finds application in various power management systems, including but not limited to: - DC-DC converters - Switching power supplies - Battery chargers - LED drivers - Industrial automation equipment

Detailed and Complete Alternative Models

• UCC3813-1: Similar to UCC3813N-1, but available in a surface mount package.
• UCC3813-2: Dual-output version of UCC3813N-1.
• UCC3814: Enhanced version with additional features such as adjustable soft-start and synchronization capability.

These alternative models offer similar functionality and can be considered based on specific design requirements.

In conclusion, UCC3813N-1 is a high-performance voltage mode PWM controller used in power management applications. Its precise regulation, compact package, and integrated protection features make it suitable for various designs. However, designers should consider alternative models based on specific needs.