BM2P137QKF-E2

Overview

The BM2P137QKF-E2 is a non-insulated PWM DC/DC converter IC with an integrated switch MOSFET. It features an 800V withstand voltage super junction MOSFET and a built-in start circuit, enabling low power consumption and simplified design for high-efficiency converters. The device utilizes current mode control with per-cycle current limiting for excellent bandwidth and transient response. Key electrical parameters include a fixed oscillation frequency of 100kHz, a drain maximum voltage (Vmax) of 800V, and an input voltage range of 10.6V to 14.05V. It operates within a temperature range of -40°C to 105°C and is housed in an SOP-8 package.

Feature Summary

• Built-in 800V withstand voltage super junction MOSFET simplifies design and tolerates high voltage stress.
• Current mode control method provides per-cycle current limiting for superior bandwidth and transient response.
• Frequency hopping function reduces electromagnetic interference (EMI).
• Burst operation at light load modes enhances efficiency under low power conditions.

Applications

• Non-insulated high-efficiency AC/DC converters
• Power supplies for consumer electronics with plug-in interfaces
• General purpose DC/DC conversion systems

Procurement Notes

Verify the specific suffix 'E2' to confirm RoHS compliance and tape-and-reel packaging configuration. Ensure the application requires an 800V rated MOSFET rather than the 650V variant found in the BM2P137QF model. Confirm that the operating environment does not involve automotive equipment, as this product is explicitly excluded from such use cases. Check for availability of the SOP-8 package format.

Selection Notes

Select this component when designing non-insulated flyback converters requiring high voltage tolerance without external gate drive components. The integrated 800V MOSFET eliminates the need for separate switching elements, reducing bill of materials. Choose this over lower voltage variants if input transients or transformer turns ratios necessitate higher drain-source breakdown voltage. The fixed 100kHz frequency suits applications where EMI filtering is managed via frequency hopping.

Part Context

This IC belongs to the BM2P series of PWM controllers by ROHM Semiconductor, designed for standalone AC/DC conversion. It integrates the controller logic and power switch into a single package, targeting cost-sensitive and space-constrained designs. The series emphasizes ease of design through internal resistance integration and robust protection circuits like UVLO and thermal shutdown.

Replacement Considerations

The BM2P137QF is a similar part but features a 650V MOSFET instead of 800V. Substitution requires verifying that the 650V rating is sufficient for the specific transformer design and input voltage spikes. No other direct pin-to-pin replacements are confirmed in the provided documentation.