UC3843ADR2G - onsemi

Manufacturer Part Number

UC3843ADR2G

Manufacturer

onsemi

Introduction

The UC3843ADR2G is a fixed frequency current-mode PWM controller designed for DC to DC switching power supplies.

Product Features and Performance

Integrated Transistor Driver for Step-Up or Step-Up/Step-Down applications

Operates in Boost or Flyback Topology

Capable of producing a positive output with isolation

Frequency switching capability of up to 500kHz

Maximum Duty Cycle of 96%

Supports a wide range of supply voltages from 7.6V to 30V

Operating temperature ranges from 0°C to 70°C

It is designed for surface mount technology in a 14-SOIC package

Product Advantages

High-frequency operation reduces external component size

Fixed frequency current mode control for improved transient response

Possibility to implement isolated power supplies

High duty cycle allows for high step-up voltage applications

Industry standard 14-SOIC package for easy integration

Key Technical Parameters

Output Type: Transistor Driver

Function: Step-Up, Step-Up/Step-Down

Topology: Boost, Flyback

Number of Outputs: 1

Output Phases: 1

Voltage Supply (Vcc/Vdd): 7.6V ~ 30V

Frequency Switching: Up to 500kHz

Duty Cycle (Max): 96%

Control Features: Frequency Control

Quality and Safety Features

Over current protection inherent to current-mode control

Under voltage lockout for safe operation

Compatibility

Compatible with multiple output configurations for versatility

Suited for various power management tasks within its specifications

Application Areas

Switch mode power supplies (SMPS)

DC-DC Converters

Power supply for Portable Devices

Telecom Power Supplies

Industrial Power Systems

Product Lifecycle

Obsolete status indicator, potential discontinuation

Recommend contacting manufacturer for replacement or upgrade options

Several Key Reasons to Choose This Product

Established proven reliability from manufacturer onsemi

Fixed frequency operation for predictable performance

High integration reduces external component count, simplifying design

Versatile applications range due to output and topology flexibility

Suitable for designing compact power supply solutions due to high-frequency switching