UC494AJ/B Specifications
Manufacturer: Unitrode
Part Number: UC494AJ/B
Product Type: PWM Controller
Control Method: Voltage Mode PWM
Oscillator Frequency: Up to 300 kHz
Output Configuration: Dual Output Drivers
Supply Voltage Range: 7 V to 40 V
Reference Voltage: 5 V Precision Reference
Error Amplifiers: Dual Error Amplifiers
Package Type: Ceramic DIP-16
Mounting Type: Through Hole
Operating Temperature Range: -55°C to +125°C
Applications Class: Switching Power Control
Packaging: Factory
Key Features
The UC494AJ/B is a voltage mode PWM controller designed for switching power supply regulation. It integrates oscillator control, error amplifiers, and output drivers within a single device. Additionally, the internal oscillator supports operating frequencies up to 300 kHz which allows efficient power conversion. Because the controller includes dual error amplifiers and a precision reference voltage, engineers can design stable and accurate power supply feedback circuits. As a result, this device is widely used in switch mode power supply designs.
Applications
Switch mode power supplies
DC-DC converter control circuits
Industrial power regulation systems
Telecommunications power supplies
Embedded power conversion modules
Motor control power regulation
Battery charger control systems
Distributed power architectures
Product Overview
The UC494AJ/B PWM controller from Unitrode provides a flexible solution for designing regulated switching power supplies. First, the integrated oscillator allows designers to configure switching frequencies suitable for various converter topologies.
Additionally, the device includes dual error amplifiers which simplify the implementation of voltage and current feedback loops. Because switching regulators require precise control of duty cycle and feedback signals, PWM controller ICs such as the UC494 remain widely used in power electronics.
Moreover, the ceramic DIP-16 package supports reliable operation in high reliability environments. This packaging format is commonly used in military electronics, industrial control hardware, and legacy power supply designs.
Therefore, the UC494AJ/B remains a dependable controller for switch mode power supply regulation and industrial power management systems.
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