BM2P109TF-E2

Overview

The BM2P109TF-E2 is a PWM DC/DC converter IC manufactured by ROHM Semiconductor, designed for offline AC/DC conversion applications. It integrates a high-voltage starting circuit and a 650V power MOSFET with a low on-resistance of 9.5Ω. The device operates within an input voltage range of 8V to 10.81V and features automatic restart functionality. It utilizes current mode control for superior transient response and includes a frequency hopping function to reduce electromagnetic interference (EMI). The switching frequency is fixed at 100 kHz in standard mode, reducing at light loads to maintain efficiency.

Feature Summary

• Integrates a 650V starting circuit and a low on-resistance 650V MOSFET for compact design and reduced power consumption.
• Employs current mode control to impose cycle-by-cycle current limitation, ensuring stable bandwidth and transient performance.
• Features a built-in frequency hopping mechanism to minimize electromagnetic interference emissions.
• Supports automatic restart operations and reduces switching frequency at light loads to enhance energy efficiency.

Applications

• Offline AC/DC power supply designs
• Compact consumer electronics power adapters
• Standby power circuits requiring low no-load consumption

Procurement Notes

Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm compliance with RoHS directives and material declarations. Ensure that the SOP-8 package dimensions match the target PCB footprint requirements. Confirm that the operating temperature range aligns with the intended environmental conditions before finalizing procurement orders.

Selection Notes

Select this component for applications requiring integrated high-voltage startup capabilities without external bias windings. The fixed 100 kHz switching frequency suits designs prioritizing predictable EMI filtering characteristics. Consider the 9.5Ω MOSFET resistance when calculating conduction losses for higher output current scenarios.

Part Context

This part belongs to the BM2P series of PWM DC/DC converters from ROHM Semiconductor. These ICs are engineered to simplify offline power supply designs by integrating high-voltage components typically found in discrete solutions. The series focuses on achieving high efficiency and small form factors through internal integration of power switches and control logic.

Replacement Considerations

BM2P109T1F