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UC3526ADWTR

TIUC3526ADWTR

Texas Instruments
Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Down, Step-Up/Step-Down DC-DC Controller IC 18-SOIC
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Overview

The UC3526ADWTR is a high-performance Pulse Width Modulator (PWM) controller designed for various switching regulator topologies, including buck, boost, and bridge configurations. It features a wide input voltage range of 7V to 35V and provides dual alternating outputs for driving power transistors. The IC integrates essential control features such as soft start, digital current limiting, and frequency control to simplify the design of efficient power conversion stages.

Why Choose This Part

The UC3526ADWTR offers a significant improvement over standard controllers by including a temperature-compensated voltage reference and an undervoltage lockout feature. Its dual-output design supports a maximum duty cycle of 49% per output, preventing transformer saturation in push-pull topologies. The 18-SOIC package provides a balance between integration and thermal performance for surface-mount designs.

Applications

Push-Pull Converters
Utilizing the dual 200mA outputs to drive transformer primary windings in isolated power supplies.
Full-Bridge and Half-Bridge Drivers
Managing complex power stages for high-power DC-DC conversion with integrated dead-time control.
Industrial Power Modules
Providing stable PWM control for step-up or step-down regulators in 12V and 24V industrial rails.
Battery Charging Systems
Implementing precise voltage and current regulation for large-scale battery management systems.

Key Specifications

Function Step-Up, Step-Down, Step-Up/Step-Down
Topology Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
Clock Sync Yes
Output Type Transistor Driver
Mounting Type Surface Mount
Output Phases 1
Package / Case 18-SOIC (0.295", 7.50mm Width)
Control Features Enable, Frequency Control, Reset, Soft Start
Duty Cycle (Max) 49%
Number of Outputs 2
Output Configuration Positive
Frequency - Switching 1Hz ~ 600kHz
Operating Temperature 0degC ~ 70degC (TA)
Synchronous Rectifier Yes
Supplier Device Package 18-SOIC
Voltage - Supply (Vcc/Vdd) 7V ~ 35V

Getting Started

When designing with the UC3526ADWTR, ensure the RT and CT components are placed close to the IC to minimize frequency jitter. Use the soft-start pin by connecting an external capacitor to manage inrush current during power-up. Engineers should consult the Texas Instruments datasheet for specific resistor and capacitor values to set the desired switching frequency and dead-time.

Also Consider

TL494IDR TITexas Instruments - A classic, cost-effective PWM controller suitable for simpler power supply designs that do not require the specific feature set of the 3526 series.

Categories

Power Management > Switching Regulators