LT3798IMSE#PBF

AC DC Converters, Offline Switchers Overview

The LT3798IMSE#PBF is a high-voltage AC/DC controller designed for offline flyback and SEPIC topologies. It integrates a precision rectifier to sense the secondary-side output voltage, enabling accurate regulation without requiring an optocoupler or auxiliary winding. The device supports primary-side regulation with enhanced accuracy through secondary sensing. It features a fixed switching frequency of 100 kHz and includes comprehensive protection mechanisms such as overvoltage, undervoltage, and thermal shutdown.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a precision secondary-side voltage sensing rectifier for accurate regulation
• Eliminates the need for optocouplers and auxiliary windings in isolated designs
• Supports both primary-side and secondary-side regulation modes
• Includes integrated protection against overvoltage, undervoltage, and thermal events

AC DC Converters, Offline Switchers Applications

• Offline flyback power supplies
• AC/DC converters with primary-side regulation requirements
• Isolated power supplies eliminating optocoupler usage
• SEPIC topology applications

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the MSOP-16 package type matches your PCB footprint requirements. Ensure the operating temperature range aligns with your application environment. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing isolated AC/DC converters that require high accuracy without optocouplers. It is suitable for applications needing primary-side regulation with secondary-sensing enhancement. Consider the 100 kHz fixed frequency for EMI management. Evaluate the integration benefits against cost and complexity reduction in transformer design.

AC DC Converters, Offline Switchers Part Context

The LT3798 belongs to Analog Devices' family of high-performance AC/DC controllers. It complements other solutions by offering a simplified architecture for isolated power conversion. The device addresses common challenges in primary-side regulation, such as line regulation errors, by incorporating secondary-side feedback capabilities directly into the controller IC.

AC DC Converters, Offline Switchers Replacement Considerations

LT3798EFE#PBF: Same functionality with different temperature grade or packaging variant.