UCC28712DR

AC DC Converters, Offline Switchers Overview

The UCC28712DR is a switching controller from the UCC2871x series, designed for isolated flyback AC/DC converters. It provides constant voltage and constant current regulation without requiring an optocoupler. The device operates within a supply voltage range of 9 V to 35 V and supports a switching frequency between 600 Hz and 106 kHz. It features a maximum duty cycle of 42.5% and draws a typical operating supply current of 2 mA. The output current capability is 25 mA, with a regulated output voltage of 14 V. It functions in an industrial temperature range from -40°C to +125°C and is housed in a SOIC-7 package.

AC DC Converters, Offline Switchers Feature Summary

• Provides primary-side sensing for precise constant voltage and constant current regulation without optical isolation components
• Integrates fixed line compensation levels to simplify design while maintaining accurate output control
• Supports remote temperature sensing functionality through integration with negative temperature coefficient resistors

AC DC Converters, Offline Switchers Applications

• Isolated flyback power supplies requiring primary-side regulation
• AC/DC converter designs utilizing the UCC2871x family architecture
• Applications necessitating remote thermal monitoring via NTC thermistors

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'DR' indicates the reel packaging format when ordering. Confirm that the fixed line compensation level aligns with your transformer design requirements, as this variant does not support programmable compensation like other members of the series. Ensure the SOIC-7 footprint matches your PCB layout constraints before finalizing procurement.

AC DC Converters, Offline Switchers Selection Notes

Select the UCC28712DR when a fixed line compensation value is acceptable for your application, distinguishing it from the programmable UCC28710 or the distinct compensation profiles of the UCC28711 and UCC28713. This part is suitable for designs prioritizing simplicity over adjustable line compensation parameters while still requiring primary-side regulation capabilities.

AC DC Converters, Offline Switchers Part Context

This component belongs to the UCC2871x series of AC/DC controllers manufactured by Texas Instruments. These devices are categorized under PMIC and Switching Controllers, specifically optimized for flyback topologies. The series enables high-efficiency power conversion by eliminating the need for secondary-side feedback loops, reducing component count and improving reliability in isolated power applications.

AC DC Converters, Offline Switchers Replacement Considerations

The UCC28710DR offers programmable line compensation instead of fixed levels. The UCC28711DR and UCC28713DR provide different fixed line compensation values. All variants share the same SOIC-7 package and basic operational principles but differ in their internal compensation settings.