MLX91221KDF-ABF-020-TU

Current Sensors Overview

The MLX91221KDF-ABF-020-TU is a board-mount current sensor IC from Melexis Technologies NV, designed for high-speed and precision applications. It operates on a supply voltage range of 3.135V to 3.465V and features a response time of 2µs. The maximum supply current is 26mA. The device supports bidirectional current sensing and offers 5.4kV isolation. It functions within an operating temperature range of -40°C to 125°C.

Current Sensors Feature Summary

• Factory trimmed AC and DC current sensing with analog ratiometric or fixed output voltage options
• Integrated differential Hall sensing elements minimize external interference magnetic field effects
• High voltage isolation between primary and secondary leads ensures safety in power electronics
• On-chip dual over-current detection (OCD) reduces reliance on external comparators

Current Sensors Applications

• Automotive onboard chargers (OBC)
• DC-DC converter high-side monitoring
• Industrial motor control systems
• Precision current measurement in power supplies

Current Sensors Procurement Notes

Verify the specific suffix TU against official Melexis documentation to confirm tape-and-reel packaging and quantity specifications. Ensure the part number matches the required 3.3V supply variant and bidirectional functionality. Cross-reference the isolation rating and temperature range with system requirements before procurement.

Current Sensors Selection Notes

Select this component when a 3.3V supply interface is required alongside high-speed response times. The bidirectional capability suits applications needing both positive and negative current monitoring. Consider the integrated OCD feature if reducing bill-of-materials complexity by eliminating external protection circuits is a priority.

Current Sensors Part Context

This model belongs to the MLX91221 series of integrated current sensor ICs. It shares architectural similarities with the MLX91220 but differs in supply voltage requirements, specifically targeting 3.3V systems. The series emphasizes factory calibration and minimal external component usage for accurate current sensing.

Current Sensors Replacement Considerations

Direct substitutes include other variants within the MLX91221 family, such as MLX91221KDF-ABF-020-RE, provided the package type and electrical parameters align with the design constraints.