UC3845N - Texas Instruments

Manufacturer Part Number

UC3845N

Manufacturer

onsemi

Introduction

The UC3845N is a high-performance, fixed-frequency, current-mode PWM (Pulse Width Modulation) controller optimized for off-line and DC-DC converter applications. It features a wide input voltage range, internal oscillator, and current-mode control to provide excellent line and load regulation.

Product Features and Performance

Wide input voltage range: 7.6V to 30V

Switching frequency up to 500kHz

48% maximum duty cycle

Current-mode control for excellent line and load regulation

Internal oscillator with ±3% frequency accuracy

Thermal shutdown and undervoltage lockout protection

Product Advantages

High-performance control for efficient power conversion

Wide input voltage range for versatile applications

Fast switching frequency allows for smaller magnetic components

Current-mode control provides good transient response

Key Reasons to Choose This Product

Proven reliability and performance for demanding power conversion applications

Extensive design and application support from onsemi

Cost-effective solution for a variety of DC-DC converter designs

Quality and Safety Features

Thermal shutdown protection

Undervoltage lockout protection

Designed and manufactured to high-quality standards

Compatibility

The UC3845N is compatible with a wide range of DC-DC converter topologies, including boost, flyback, and other step-up and step-up/step-down configurations.

Application Areas

Off-line power supplies

DC-DC converters

Battery chargers

Industrial control systems

Telecommunications equipment

Automotive electronics

Product Lifecycle

The UC3845N is an obsolete product, meaning it is no longer in active production. However, there are several alternative and equivalent models available, such as the UC3846, UC3849, and NCP1562. Customers are advised to contact our website's sales team for more information on available options and support for their specific design requirements.