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TL594IDR

TITL594IDR

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 16-SOIC
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Overview

The TL594IDR is a versatile PWM power-control integrated circuit that incorporates all the functions required for the construction of pulse-width-modulation control circuits on a single chip. It supports multiple topologies including buck, boost, and push-pull configurations with a wide supply voltage range of 7V to 40V. This controller is particularly useful for systems requiring precise dead-time control and uncommitted output transistors capable of 200mA source or sink current.

Why Choose This Part

The TL594IDR offers improved 1% reference accuracy and an internal undervoltage lockout (UVLO) for enhanced system reliability compared to older PWM controllers. Its dual-output architecture with output control pins allows for easy switching between single-ended and push-pull operation without external logic.

Applications

Switch-Mode Power Supplies (SMPS)
Acts as the primary controller for push-pull, half-bridge, and full-bridge power converters.
DC-DC Converters
Efficiently manages step-up (boost), step-down (buck), and inverting topologies in industrial systems.
Motor Speed Control
Utilized in drive circuits to provide variable PWM signals for DC motor regulation.
Battery Charging Systems
Provides stable voltage regulation and current limit control for high-voltage charging applications.

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 No
Output Type Transistor Driver
Mounting Type Surface Mount
Output Phases 1
Package / Case 16-SOIC (0.154", 3.90mm Width)
Control Features Dead Time Control, Frequency Control
Duty Cycle (Max) 97%
Number of Outputs 2
Output Configuration Positive
Frequency - Switching 1kHz ~ 300kHz
Operating Temperature -40degC ~ 85degC (TA)
Synchronous Rectifier No
Supplier Device Package 16-SOIC
Voltage - Supply (Vcc/Vdd) 7V ~ 40V

Getting Started

When designing with the TL594IDR, refer to the Texas Instruments application notes for calculating timing resistor (RT) and capacitor (CT) values to set the internal oscillator frequency. For prototyping, ensure proper bypassing of the 5V reference output (VREF) and use a 16-SOIC breakout board for breadboard evaluation.

Also Consider

TL494IDR TITexas Instruments - A closely related industry-standard PWM controller often used when a slightly wider tolerance on the reference voltage is acceptable.
UC3843A TITexas Instruments - A current-mode PWM controller suitable for simpler flyback and boost topologies requiring fewer external synchronization.