BM1R00149F-E2

AC DC Converters, Offline Switchers Overview

The BM1R00149F-E2 is a secondary-side synchronous rectification controller IC designed for flyback converters. It features a built-in ultra-low power shunt regulator with 0.5% accuracy to minimize standby consumption. The device supports high-side and low-side FET configurations using a 120V drain monitor voltage process. Operating voltage ranges from 2.7V to 32V, with an operating temperature range of -40°C to 105°C. It operates in continuous conduction mode without primary-side sync signals and includes thermal shutdown and auto-shutdown functions.

AC DC Converters, Offline Switchers Feature Summary

• Built-in ultra-low consumption shunt regulator reduces standby power consumption
• Supports both high-side and low-side synchronous rectification FET applications
• Enables operation in continuous conduction mode without primary-side switching synchronization signals
• Integrates overvoltage protection for SH_IN/SH_OUT terminals and thermal shutdown

AC DC Converters, Offline Switchers Applications

• Secondary side output stage control in flyback power supplies
• High-efficiency AC/DC adapters requiring low standby power
• Power supplies utilizing LLC or PWM QR controllers

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix E2 indicates the RoHS-compliant version when ordering. Confirm SOP-8 package availability matches design requirements. Ensure the application circuit accommodates the 2.7V to 32V supply voltage range. Check that the 120V drain monitor rating suits the target transformer isolation levels. Validate thermal management strategies for the specified operating temperature range.

AC DC Converters, Offline Switchers Selection Notes

Select this component for flyback topologies requiring independent secondary-side regulation without optocouplers. It is suitable for designs needing high-side driver capability via the GND-referenced shunt regulator. Consider its compatibility with LLC and QR controllers that do not provide primary sync signals. Evaluate the 120V耐压 requirement against the maximum drain voltage stress in the target application.

AC DC Converters, Offline Switchers Part Context

This IC belongs to ROHM's series of secondary-side synchronous rectification controllers. It shares functional similarities with models like BM1R00146F, BM1R00148F, and BM1R00178F within the same product family. These devices generally offer similar voltage ranges and protection features but may differ in fixed off-time specifications or specific regulatory accuracies.

AC DC Converters, Offline Switchers Replacement Considerations

BM1R00146F-E2, BM1R00148F-E2, and BM1R00178F-E2 are compatible alternatives within the same series. Verify pinout compatibility and specific parameter differences such as fixed off-time duration before substitution.