onsemi

UC3842BVD1G  

DC DC Switching Controllers

UC3842BVD1G Description

The UC3842BVD1G from onsemi is a high-performance current-mode PWM controller designed for DC-DC switching power supply applications. This obsolete but robust IC operates with a wide supply voltage range of 10V to 30V, making it suitable for diverse power conversion systems. It supports switching frequencies up to 500kHz, enabling efficient power management in compact designs. The device features a single-output transistor driver with positive polarity and isolation capability, ideal for boost and flyback topologies. Its 96% maximum duty cycle ensures high efficiency in voltage conversion, while frequency control allows precise regulation. Packaged in an 8-pin SOIC, it is optimized for surface-mount applications.

UC3842BVD1G Features

• Current-Mode PWM Control: Enhances loop response and simplifies compensation.
• Wide Input Voltage Range (10V–30V): Supports flexible power supply designs.
• High Switching Frequency (500kHz): Enables compact magnetics and filtering.
• Isolation-Capable Output: Suitable for isolated power topologies.
• 96% Max Duty Cycle: Maximizes energy transfer efficiency.
• Single-Output Driver: Simplified design for flyback/boost converters.
• ROHS3 Compliant & REACH Unaffected: Meets environmental regulations.
• Surface-Mount (SOIC-8) Package: Space-efficient for modern PCB layouts.

UC3842BVD1G Applications

The UC3842BVD1G excels in:

• Switch-Mode Power Supplies (SMPS): For industrial, telecom, and consumer electronics.
• Isolated DC-DC Converters: Flyback designs in medical or automotive systems.
• LED Drivers: High-efficiency constant-current supplies.
• Battery Chargers: Fast-charging circuits with precise voltage regulation.
• Auxiliary Power Supplies: Low-power bias generation in larger systems.

Conclusion of UC3842BVD1G

Though marked obsolete, the UC3842BVD1G remains a reliable choice for high-frequency, current-mode PWM control in isolated/non-isolated power systems. Its wide voltage range, high duty cycle, and compact package make it ideal for legacy designs or replacements. Engineers value its simplicity, performance, and compliance with environmental standards, ensuring longevity in applications demanding robust power management. For modern alternatives, consider onsemi's updated PWM controllers with enhanced features.

UC3842BVD1G Documents

Download datasheets and manufacturer documentation for UC3842BVD1G

PCN Assembly/Origin :

Mult Dev Test Add 19/Mar/2021      

Datasheets :

UC384(2,3)B, UC284(2,3)B      

PCN Packaging :

Tape Design Chg 25/Oct/2019      

PCN Obsolescence/ EOL :

Mult Dev EOL 08/Jul/2021      

HTML Datasheet :

UC384(2,3)B, UC284(2,3)B      

PCN Design/Specification :

UC3842BVD/UC3844BVD Copper Wire 15/Aug/2013      

Environmental Information :

onsemi RoHS       onsemi REACH       Material Declaration UC3842BVD1G