Texas Instruments

UC1842J  

Power Supply Controllers, Monitors

UC1842J Description

The UC1842J from Texas Instruments is a high-performance current-mode PWM controller designed for precision power supply applications. Housed in an 8-CDIP (Through Hole) package, it operates within a 12V to 28V supply range with a 11mA typical supply current, making it highly efficient for demanding power conversion tasks. Part of the UCx84x series, this controller is ROHS3 Compliant and REACH Unaffected, ensuring compliance with environmental standards. Its tube packaging and non-MSLA (Moisture Sensitivity Level Not Applicable) status make it robust for industrial handling and storage.

UC1842J Features

• Current-Mode Control: Enhances loop response and simplifies compensation compared to voltage-mode controllers.
• Wide Supply Range (12V–28V): Supports diverse input sources, including offline and DC-DC applications.
• Low Quiescent Current (11mA): Optimizes efficiency in standby or low-load conditions.
• Through-Hole Mounting (CDIP): Ensures reliability in high-temperature or high-vibration environments.
• Robust Protection: Built-in features like under-voltage lockout (UVLO) and cycle-by-cycle current limiting.
• Industry-Standard UCx84x Architecture: Ensures compatibility with legacy designs while offering improved performance.

UC1842J Applications

The UC1842J excels in:

• Switch-Mode Power Supplies (SMPS): Particularly flyback, forward, and boost converters requiring precise regulation.
• Industrial Power Systems: Motor drives, inverters, and UPS systems benefit from its rugged design.
• Telecom/Server PSUs: High-efficiency DC-DC conversion with minimal standby losses.
• LED Drivers: Constant-current control for high-brightness lighting applications.
• Automotive Electronics: Suitable for auxiliary power modules due to its wide input range and durability.

Conclusion of UC1842J

The UC1842J stands out as a versatile, reliable PWM controller for high-efficiency power conversion. Its current-mode architecture, wide voltage range, and industrial-grade packaging make it ideal for both traditional and cutting-edge power designs. Engineers favor it for its balance of performance, compliance, and cost-effectiveness, particularly in applications demanding robustness and precision. Texas Instruments' legacy in power management further ensures its suitability for mission-critical systems.

UC1842J Documents

Download datasheets and manufacturer documentation for UC1842J