UCC29421NG4

DC DC Switching Controllers Overview

The UCC29421NG4 is a multi-topology DC-DC regulator controller manufactured by Unitrode, designed for high-frequency PWM applications. It supports boost, flyback, and SEPIC converter topologies, functioning as both step-up and step-up/step-down controllers. The device features a transistor driver output with positive configuration. Packaged in a 16-DIP (0.300 inch, 7.62mm) tube, this component is classified as obsolete. It complies with ROHS3 standards and serves as a power management integrated circuit for various switching power supply designs requiring versatile topology support.

DC DC Switching Controllers Feature Summary

• Supports multiple converter topologies including boost, flyback, and SEPIC configurations
• Functions as a multimode high-frequency PWM controller for versatile power conversion
• Provides transistor driver output with positive output configuration

DC DC Switching Controllers Applications

• Boost converter applications
• Flyback converter designs
• SEPIC converter implementations

DC DC Switching Controllers Procurement Notes

Verify the obsolete status of the UCC29421NG4 before procurement planning, as availability may be limited to existing stock or third-party distributors. Confirm that the 16-DIP package matches your PCB footprint requirements. Ensure compliance with ROHS3 regulations if required for your specific manufacturing environment. Check for valid manufacturer documentation to confirm pinout and electrical characteristics against current design specifications.

DC DC Switching Controllers Selection Notes

Select the UCC29421NG4 when a single controller must support multiple power stage topologies such as boost, flyback, or SEPIC within a system. Consider its 16-DIP package for through-hole assembly needs. Evaluate the obsolete lifecycle status carefully, as long-term supply chain stability may be compromised compared to active components. Verify that the high-frequency PWM capabilities align with your switching frequency requirements.

DC DC Switching Controllers Part Context

The UCC29421 belongs to the Unitrode family of power management ICs, later integrated into Texas Instruments' portfolio. This specific part number represents the DIP package variant of the UCC29421 multimode controller. It is distinct from other Unitrode controllers like the UCC3884, which may share similar functions but differ in packaging or specific feature sets. The NG4 suffix typically denotes the lead-free and RoHS-compliant version of the standard UCC29421.

DC DC Switching Controllers Replacement Considerations

As an obsolete component, direct substitutes are not officially listed in public documentation. Designers should evaluate equivalent multimode PWM controllers from Texas Instruments or other manufacturers that offer active production status. Ensure any replacement maintains compatibility with boost, flyback, and SEPIC topologies while matching the required package type or allowing for PCB redesign.