BM2P181W-Z

AC DC Converters, Offline Switchers Overview

The BM2P181W-Z is a non-isolated PWM DC/DC converter IC from ROHM Semiconductor, designed for AC/DC conversion in plug-in applications. It integrates a 650V super junction MOSFET and a startup circuit within a DIP-7 package. The device operates with an input voltage range of 17.82 V to 18.18 V and features a fixed switching frequency of 65 kHz. Key electrical parameters include a quiescent current of 1.05 mA, a maximum duty cycle not explicitly defined but implied by topology, and operation temperatures from -40°C to +105°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 650V super junction MOSFET and startup circuit for simplified design
• Employs current mode control with per-cycle current limiting for stable performance
• Includes frequency hopping functionality to reduce electromagnetic interference
• Supports burst operation at light loads to enhance efficiency

AC DC Converters, Offline Switchers Applications

• Power systems for products utilizing wall outlets
• Non-insulated high-efficiency AC/DC converters
• Compact power supply designs requiring integrated components

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific input voltage requirements against the 17.82 V to 18.18 V range before integration. Confirm that the application does not involve automotive equipment, as this component is not recommended for such use. Ensure compatibility with the DIP-7 through-hole mounting style and check for RoHS compliance documentation during sourcing.

AC DC Converters, Offline Switchers Selection Notes

Select this model when a narrow input voltage window around 18 V is required for non-isolated AC/DC conversion. It is suitable for designs prioritizing compactness due to the integrated MOSFET and current sense resistor. Consider the 65 kHz switching frequency and EMI reduction features if noise sensitivity is a factor in the target system.

AC DC Converters, Offline Switchers Part Context

This component belongs to the BM2Pxxx series of AC/DC converters with integrated FETs. It shares architectural similarities with models like BM2P121W-Z and BM2P161W-Z, differing primarily in the specified input voltage range. The series targets general-purpose plug-in adapters and consumer electronics power supplies.

AC DC Converters, Offline Switchers Replacement Considerations

BM2P161W-Z offers a wider input voltage range (8 V to 18.16 V) but may require different external component values. BM2P151W-Z provides a similar mid-range input specification. Verify pinout compatibility and thermal characteristics when substituting.