BD28C57HFJ-LBE2

Overview

The BD28C57HFJ-LBE2 is a PWM-type DC/DC converter IC designed for industrial equipment. It supports input voltages from 6.9 V to 28 V and operates at switching frequencies up to 500 kHz. The device utilizes current mode control with per-cycle overcurrent protection and features a VDD UVLO function compatible with Si and SiC MOSFETs. It is housed in an SOP-J8 package (4.9x6.0 mm) and functions within a temperature range of -40°C to 125°C.

Feature Summary

• Supports both insulated and non-insulated device designs
• Enables flexible power supply design via external current detection resistors
• Provides superior bandwidth and transient response through current mode control

Applications

• Industrial equipment power supplies
• Low-power AC/DC converters
• SiC MOSFET gate driving applications

Procurement Notes

Verify the specific suffix 'E2' against the manufacturer's official documentation to confirm compliance with RoHS directives and long-term supply plans. Ensure the SOP-J8 package dimensions match the target PCB footprint requirements. Confirm that the external components selected for the RTCT pin align with the desired switching frequency specifications provided in the datasheet.

Selection Notes

Select this component when designing systems requiring high-voltage isolation or compatibility with wide-bandgap semiconductors like SiC. The integrated UVLO feature simplifies driver selection for various MOSFET types. Consider the external resistor and capacitor requirements for frequency setting during the initial schematic phase to ensure optimal performance within the specified operating temperature range.

Part Context

This IC belongs to Rohm Semiconductor's series of PWM-type DC/DC converters aimed at industrial markets. It addresses the need for simplified design in low-power power conversion circuits. The product line emphasizes flexibility through external component configuration and robust protection mechanisms suitable for demanding operational environments.

Replacement Considerations

Consult the official datasheet for direct pin-to-pin alternatives within the same family. Verify functional equivalence regarding UVLO thresholds and maximum switching frequencies before substituting.