IR2171STR

Current Regulation/Management Overview

The IR2171STR is a monolithic linear current sensing integrated circuit manufactured by Infineon Technologies. Designed for motor drive applications, it senses motor phase current through an external sense resistor and provides a proportional output voltage. The device operates within a supply voltage range of 4.5V to 30V and features a fixed output current capability of 1mA. It is housed in an 8-SOIC surface-mount package and supports an operating temperature range from -40°C to +125°C.

Current Regulation/Management Feature Summary

• Monolithic design for direct integration into motor drive circuits
• Linear current sensing with external resistor interface
• Fixed 1mA output current capability for signal conditioning

Current Regulation/Management Applications

• Motor drive phase current monitoring
• Brushed DC motor control systems
• Current regulation loops in power electronics

Current Regulation/Management Procurement Notes

Verify the component authenticity by checking the manufacturer marking on the 8-SOIC package against official Infineon specifications. Confirm the suffix STR indicates tape-and-reel packaging if required for automated assembly. Ensure the order matches the exact part number IR2171STR to avoid confusion with similar variants like IR2171S or IR2172.

Current Regulation/Management Selection Notes

Select this component when a simple, low-cost linear current sensor is needed for motor phase monitoring. It is suitable for applications requiring a direct voltage-to-current conversion without complex digital interfaces. Consider the 8-SOIC package constraints and the specific output current requirement of 1mA when designing the downstream signal processing circuitry.

Current Regulation/Management Part Context

The IR2171 series belongs to Infineon's portfolio of linear current sensing ICs. These devices are distinct from digital sensors as they provide analog outputs proportional to the sensed current. The IR2171STR variant specifically denotes the surface-mount SOIC package configuration, differentiating it from through-hole or other package options within the same functional family.

Current Regulation/Management Replacement Considerations

The IR2172 is a related device in the same family but may have different electrical characteristics or pin configurations. Verify compatibility before substitution. No other direct public substitutes are confirmed in the provided documentation.