LT3798EMSE#PBF

AC DC Converters, Offline Switchers Overview

The LT3798EMSE#PBF is a high-voltage AC/DC controller designed for offline flyback converters with active power factor correction. It integrates a high-voltage current source to bias the IC, eliminating the need for auxiliary windings. The device supports universal AC input and operates from a wide input voltage range. It features programmable switching frequency and cycle-by-cycle current limiting. The component is housed in a 16-lead MSOP package with an exposed pad for thermal management.

AC DC Converters, Offline Switchers Feature Summary

• Integrated high-voltage current source eliminates auxiliary winding requirements
• Supports active power factor correction in flyback topologies
• Cycle-by-cycle current limiting protects against overload conditions

AC DC Converters, Offline Switchers Applications

• Offline AC/DC power supplies
• Active PFC flyback converters
• Universal input adapter designs

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix #PBF indicates lead-free and RoHS compliance status according to Analog Devices documentation. Confirm the package type matches the design requirements before procurement. Check for any recent product change notices that may affect pinout or electrical characteristics. Ensure the supplier provides valid traceability documents.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for applications requiring integrated PFC without external bootstrap circuits. The internal high-voltage bias simplifies transformer design by removing auxiliary winding constraints. Consider the thermal performance of the MSOP package for high-power density designs. Verify compatibility with external MOSFETs for the intended voltage and current ratings.

AC DC Converters, Offline Switchers Part Context

This part belongs to the LT3798 family of AC/DC controllers. It is distinct from standard DC-DC regulators as it handles direct rectified mains voltage. The EMSE suffix denotes the MSOP package variant. It serves as a core control element in efficient offline power conversion systems.

AC DC Converters, Offline Switchers Replacement Considerations

LT3798EFE#PBF is a confirmed equivalent part number offering the same functionality in a TSSOP package.