BM1Q002AFJ-LBE2

AC DC Converters, Offline Switchers Overview

The BM1Q002AFJ-LBE2 is a quasi-resonant DC-DC converter IC designed for isolated flyback applications. It operates with an external switching MOSFET and current sense resistor, supporting a minimum input voltage of 8.9 V and a maximum of 26 V. The device features a maximum switching frequency of 120 kHz and a typical operating supply current of 600 uA. It provides one output channel in an SOP-J7S package, rated for temperatures between -40°C and +105°C.

AC DC Converters, Offline Switchers Feature Summary

• Implements quasi-resonant operation to achieve soft switching and reduce electromagnetic interference.
• Integrates a start-up circuit to minimize standby power consumption and accelerate startup sequences.
• Includes burst mode functionality at light loads to further decrease quiescent current during low demand.
• Provides comprehensive protection mechanisms including overcurrent, overvoltage, overload, and thermal shutdown.

AC DC Converters, Offline Switchers Applications

• Industrial equipment power supplies requiring long-term component availability
• Systems utilizing socket-based architectures for modular design
• Applications demanding high efficiency under varying load conditions

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix LB against official ROHM documentation to confirm pinout and electrical characteristics match your schematic requirements. Confirm that the SOP-J7S package dimensions align with your PCB footprint constraints. Ensure the external components selected for the switching MOSFET and current sensing resistor meet the voltage and current ratings specified in the datasheet for reliable operation within the industrial temperature range.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing isolated AC/DC converters that require reduced EMI through quasi-resonant switching. It is suitable for designs where minimizing standby power is critical due to integrated burst mode and start-up circuits. Consider the need for external power switches, as this controller does not integrate the main switching MOSFET internally, allowing for flexible voltage rating choices.

AC DC Converters, Offline Switchers Part Context

This part belongs to the BM1Q0xxAFJ-LB series of quasi-resonant controllers from ROHM Semiconductor. These devices are positioned as long-life support products specifically targeted at the industrial market. The series emphasizes reliability and flexibility by separating the control logic from the high-voltage switching element.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution lists for direct equivalents within the BM1Q0xxAFJ-LB family. Verify compatibility if replacing with other quasi-resonant controllers, ensuring pinouts and protection thresholds match.