BD7F200HFN-LBTR

Overview

The BD7F200HFN-LBTR is an isolated flyback switching regulator IC manufactured by ROHM Semiconductor. It features a built-in N-channel MOSFET and utilizes adaptive on-time control technology to eliminate the need for optocouplers or transformer tertiary windings for feedback. The device supports an input voltage range of 8V to 40V and delivers up to 1A switch current. It operates with a fixed switching frequency of 400kHz in normal mode, ensuring low output ripple, while transitioning to PFM at light loads for high efficiency. The IC includes soft start, thermal shutdown, UVLO, OCP, and OVP functions.

Feature Summary

• Eliminates the requirement for optocouplers and transformer tertiary windings through proprietary adaptive on-time control technology.
• Integrates a high-voltage N-channel power MOSFET within the controller package.
• Provides fast load transient response without external phase compensation components.
• Supports shutdown and enable control signals for system power management.

Applications

• Isolated power supplies for industrial equipment
• General-purpose isolated DC-DC conversion systems
• Power modules requiring compact design and high reliability

Procurement Notes

Verify that the specific suffix LBTR corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the component meets RoHS3 compliance standards for your manufacturing region. Ensure the ordering quantity aligns with the standard reel size specified by the manufacturer to avoid partial reel handling issues during production.

Selection Notes

Select this component when designing isolated power architectures that require reduced bill-of-materials count by removing optocouplers. It is suitable for applications needing robust transient response and high efficiency across varying load conditions. Consider the 400kHz switching frequency for balancing component size and electromagnetic interference performance.

Part Context

This part belongs to the BD7F series of isolated flyback converters from ROHM Semiconductor. The series is characterized by its ability to provide stable isolated outputs without traditional feedback loops involving optocouplers. The BD7F200 variant specifically targets applications requiring higher current capabilities compared to lower-end models in the same family, supporting up to 1A switch current.

Replacement Considerations

Direct substitutes within the BD7F series may include variants with different current ratings or package options, such as the BD7F100HFN-LBTR for lower current needs. Cross-family replacements would require evaluating similar isolated flyback controllers with integrated MOSFETs and comparable control topologies.