UCC3809N-2

AC DC Converters, Offline Switchers Overview

The UCC3809N-2 is an economy primary side controller from Texas Instruments, designed for off-line and isolated DC-to-DC converters. It supports Boost, Buck, Flyback, and Forward topologies with a switching frequency of 1 MHz. The device features a maximum duty cycle of 70% and provides a regulated output voltage of 5 V at up to 1 A output current. It operates within a temperature range of 0°C to +70°C and is housed in a PDIP-8 package.

AC DC Converters, Offline Switchers Feature Summary

• Integrates all control and drive circuitry required for primary side regulation
• Supports multiple converter topologies including flyback and forward
• Includes built-in soft-start and frequency control capabilities

AC DC Converters, Offline Switchers Applications

• Off-line power supplies
• Isolated DC-to-DC converters
• Flyback converter designs

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix N-2 against the official datasheet to confirm the PDIP-8 through-hole package and 5V output variant. Ensure compatibility with the required operating temperature range of 0°C to +70°C. Confirm that the 1A output current capability meets the load requirements of the target application design.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-sensitive applications requiring primary side regulation without optocouplers. It is suitable for low-power offline converters where high precision secondary side feedback is not mandatory. Consider the PDIP-8 package for through-hole assembly processes and verify that the 1MHz switching frequency aligns with the magnetic component design constraints.

AC DC Converters, Offline Switchers Part Context

This part belongs to the UCC3809 family of BCDMOS economy low power integrated circuits. It is distinct from the UCC3809P variants which use different packaging such as VSSOP or MSOP. The N-2 suffix specifically denotes the through-hole PDIP package and the 5V output configuration, differentiating it from other output voltage options in the series.

AC DC Converters, Offline Switchers Replacement Considerations

Check for UCC3809N-1 if a 10V output is required instead of 5V. Verify UCC3809D-2 or UCC3809P-2 for surface mount alternatives with identical electrical characteristics but different package footprints.