LM5021NA-2/NOPB

AC DC Converters, Offline Switchers Overview

The LM5021NA-2/NOPB is an AC-DC current mode PWM controller manufactured by Texas Instruments. It supports flyback and forward topologies with a supply voltage range of 8 V to 30 V and a startup voltage of 20 V. The device operates within a temperature range of -40°C to +125°C TJ. It features a maximum switching frequency up to 1 MHz and a duty cycle of 80%. The component is housed in an 8-DIP package for through-hole mounting.

AC DC Converters, Offline Switchers Feature Summary

• Supports flyback and forward converter topologies
• Operates with wide input supply voltage range
• Includes skip cycle mode for light load efficiency

AC DC Converters, Offline Switchers Applications

• Offline power supplies
• Flyback converter designs
• Forward converter applications

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'NA-2' against official Texas Instruments documentation to confirm pinout and functional compatibility, as variations exist within the LM5021 family. Confirm lead-free status via the NOPB designation. Check current product lifecycle status, as some variants may be obsolete or discontinued. Ensure the selected package matches the target PCB footprint requirements.

AC DC Converters, Offline Switchers Selection Notes

Select this component for isolated AC-DC conversion requiring current mode control. Verify that the required switching frequency does not exceed the 1 MHz limit. Ensure the design accommodates the 20 V startup threshold. Compare against other LM5021 variants if different packages or specific feature sets are needed. Confirm thermal management capabilities for the intended operating environment.

AC DC Converters, Offline Switchers Part Context

The LM5021 series comprises AC-DC current mode PWM controllers designed for offline applications. The LM5021NA-2/NOPB variant specifically utilizes an 8-DIP package. Other family members include MM (MSOP) and NA-1 variants. These controllers integrate essential protection features and offer flexible configuration options for various power supply architectures.

AC DC Converters, Offline Switchers Replacement Considerations

Check for LM5021NA-1/NOPB or LM5021MM-1/NOPB as potential alternatives depending on package preference. Verify functional equivalence regarding topology support and electrical specifications before substitution.