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UC3845AD8TR

TIUC3845AD8TR

Texas Instruments
Boost, Buck, Flyback, Forward Converter Regulator Output DC-DC Controller IC 8-SOIC
Active11,466 in stock
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Overview

The UC3845AD8TR is a high-performance current-mode PWM controller designed for DC-DC converters and off-line power supplies. It features automatic feedforward compensation, pulse-by-pulse current limiting, and an internally-trimmed bandgap reference. With a low start-up current and totem pole output, it is suitable for various power conversion applications.

Why Choose This Part

Engineers choose the UC3845AD8TR for its optimized performance in both off-line and DC-DC converter applications, supporting up to 500kHz operation. The integrated features like pulse-by-pulse current limiting and undervoltage lockout with hysteresis enhance system reliability and protection. Its low start-up current minimizes power consumption during initial operation.

Applications

Switch Mode Power Supplies (SMPS)
Used as the core control IC in various SMPS designs, including boost, buck, flyback, and forward topologies.
DC-DC Converters
Ideal for regulating DC voltage in a wide range of DC-DC conversion applications due to its robust feature set.
Power Modules
Integrated into self-contained power modules to provide efficient and regulated power output.
Industrial PSU
Suitable for power supply units in industrial environments requiring stable and reliable power conversion.
Battery Operated PSU
Its low start-up current of less than 0.5mA makes it effective for power supplies in battery-powered systems.

Key Specifications

Topology Boost, Buck, Flyback, Forward Converter
Clock Sync No
Output Type PWM
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Duty Cycle (Max) 50%
Number of Outputs 1
Frequency - Switching Up to 500kHz
Operating Temperature 0degC ~ 70degC (TA)
Supplier Device Package 8-SOIC

Getting Started

To get started with the UC3845AD8TR, refer to Texas Instruments application notes and reference designs for current-mode PWM controllers. Utilize standard circuit design tools for power supply simulation and PCB layout. Consider prototyping the power stage on a breadboard or perfboard to test its characteristics before finalizing the design.

Categories

Power Management > Switching Regulators