UC3842ADG4

Power Supply Controllers, Monitors Overview

The UC3842ADG4 is a current-mode PWM controller manufactured by Texas Instruments, designed for offline and DC-to-DC converter applications. It operates within a supply voltage range of 12 V to 28 V with a typical operating current of 25 mA. The device supports Boost, Buck, Flyback, and Forward topologies, featuring a switching frequency capability up to 500 kHz and a maximum duty cycle of 100%. It provides a single output with a drive capability of 200 mA at 5 V. The component functions reliably across an operating temperature range from 0°C to +70°C and utilizes an SOIC-14 surface-mount package.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode control architecture for enhanced line regulation and fast transient response.
• Supports versatile power conversion topologies including Boost, Buck, Flyback, and Forward configurations.
• Features integrated oscillator with programmable timing resistor and built-in clocked jittering.

Power Supply Controllers, Monitors Applications

• Offline AC/DC converters
• DC-to-DC step-down converters
• Forward converters

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'DG4' confirms lead-free construction and RoHS compliance as per manufacturer specifications. Confirm the SOIC-14 package dimensions match your PCB footprint requirements. Ensure the operating temperature range of 0°C to +70°C aligns with your system's thermal environment. Cross-reference the datasheet revision date to ensure compatibility with your design constraints.

Power Supply Controllers, Monitors Selection Notes

Select this component when a robust current-mode controller is required for standard isolated or non-isolated power supplies. The UC3842A series offers a balance of performance and cost-effectiveness for general-purpose applications. Consider the SOIC-14 package for surface-mount assembly needs. Evaluate the 500 kHz switching frequency against transformer size and efficiency requirements for your specific topology.

Power Supply Controllers, Monitors Part Context

The UC3842ADG4 belongs to the UC3842A family of high-performance current-mode PWM controllers. This series is widely recognized in the industry for its reliability in various power supply designs. The 'A' designation typically indicates improved specifications over earlier variants, while 'DG4' specifies the package type and environmental compliance. It serves as a foundational component for designing efficient switching power stages.

Power Supply Controllers, Monitors FAQ

What is the maximum duty cycle supported by the UC3842ADG4?

The UC3842ADG4 supports a maximum duty cycle of 100%.

Which power topologies are compatible with this controller?

It is compatible with Boost, Buck, Flyback, and Forward topologies.