IR21771SPBF

Current Regulation/Management Overview

The IR21771SPBF is a high-voltage, high-speed single-phase current sensor interface designed for AC motor drive applications. It features a floating channel capable of withstanding up to 600V. The device integrates a precision amplifier and level-shifting circuitry to accurately sense phase currents in three-phase inverter topologies. Packaged in a 16-pin SOIC-W surface-mount format, it provides isolated signal transmission from the high-side power stage to the control logic.

Current Regulation/Management Feature Summary

• High voltage floating channel operation suitable for high-side current sensing
• Integrated precision amplifier for accurate current measurement
• Designed specifically for AC motor drive and inverter applications

Current Regulation/Management Applications

• AC motor drive systems
• Three-phase inverter current sensing
• Industrial motor control circuits

Current Regulation/Management Procurement Notes

Verify the manufacturer designation as Infineon Technologies, which acquired International Rectifier. Confirm the package type is 16-pin SOIC-W. Ensure the suffix PBF indicates lead-free compliance. Cross-reference the part number against official Infineon documentation to confirm availability and revision status, as legacy designations may vary in distributor listings.

Current Regulation/Management Selection Notes

Select this component when a dedicated single-phase current sensor interface is required for high-side sensing in AC motor drives. The 600V floating rating determines suitability for specific bus voltages. Consider the SOIC-W package constraints for PCB layout. Verify that the integrated gain and bandwidth meet the specific control loop requirements of the target motor application.

Current Regulation/Management Part Context

This component belongs to the IR21771/IR22771 family of phase current sensor ICs. The IR21771 variant is rated for 600V floating channels, while the IR22771 supports 1200V. These devices are engineered to simplify the implementation of current feedback loops in power electronics by combining sensing and signal conditioning in a single integrated circuit.

Current Regulation/Management Replacement Considerations

The IR22771S is a related variant within the same family offering a higher 1200V floating channel rating. Direct substitution requires verifying that the increased voltage rating does not impact other circuit parameters and that pin compatibility is maintained across the specific package variants.