BM2P0161-Z

Overview

The BM2P0161-Z is a PWM-type DC/DC converter IC designed for AC/DC applications, featuring an integrated 730V high-voltage switching MOSFET and starter circuit. It supports non-isolated buck and isolated flyback topologies with input voltages ranging from 8.9V to 26V. The device utilizes current mode control for per-cycle current limiting and offers a fixed switching frequency of 65kHz. Key electrical parameters include a maximum drain voltage of 730V, operating temperature range of -40°C to +105°C, and DIP-7K packaging.

Feature Summary

• Integrates a 730V耐压 high-voltage power MOSFET and startup circuit to reduce standby power consumption.
• Employs current mode control architecture to ensure excellent bandwidth and transient response performance.
• Includes frequency hopping and burst operation modes at light loads to minimize electromagnetic interference (EMI) and improve efficiency.
• Provides comprehensive protection features including soft start, thermal shutdown, VCC overvoltage protection, and per-cycle overcurrent limiting.

Applications

• Power supplies for household appliances with power outlets
• Non-isolated low-power converters
• Isolated flyback converters for air conditioner control systems
• General-purpose AC/DC conversion in consumer electronics

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as BM2P0161W-Z may exist within the family. Confirm that the application does not involve automotive equipment, as this component is classified as standard grade and is explicitly not recommended for automotive use. Ensure compatibility with the intended isolation topology, as the IC supports both isolated and non-isolated designs depending on external circuit configuration.

Selection Notes

Select this IC for designs requiring high-voltage integration and low standby power in AC/DC converters. The fixed 65kHz switching frequency simplifies EMI filter design compared to variable frequency alternatives. Consider the DIP-7K package for through-hole assembly requirements. Evaluate the need for external current sense resistors, as the BM2P0161-Z relies on them for precise current mode control, unlike some internal-resistance counterparts.

Part Context

The BM2P0161-Z belongs to ROHM's BM2P series of AC/DC converter ICs optimized for products with power sockets. This series focuses on achieving high efficiency and compact design by integrating high-voltage MOSFETs and advanced control logic. The BM2P0161-Z specifically targets mid-to-low power applications, offering a balance between performance and cost through its robust protection features and simplified external component count.

Replacement Considerations

BM2P0151-Z: Similar PWM controller with integrated 650V MOSFET; verify drain voltage rating differences.

FAQ

Does the BM2P0161-Z support both isolated and non-isolated topologies?

Yes, the BM2P0161-Z can be used for both isolated flyback and non-isolated buck converter designs, depending on the external circuit configuration.

What is the purpose of the frequency hopping function in this IC?

The frequency hopping function spreads the switching energy spectrum to help achieve lower electromagnetic interference (EMI) levels during operation.