UCC21231ADLGR

Overview

The UCC21231ADLGR is a high-speed dual-channel isolated gate driver manufactured by Texas Instruments. It features capacitive coupling technology and supports universal configurations including dual low-side, dual high-side, or half-bridge driving applications. The device provides up to 4A peak source and 6A peak sink output current capability. It offers a 1.6kVRMS basic isolation rating for robust signal transmission across isolation barriers. Key electrical specifications include a maximum propagation delay of 45 ns, an operating supply current of 4.8 mA, and power dissipation of 950 mW. The component is housed in a compact 13-WSON (4x4) package.

Feature Summary

• Universal configuration support for dual low-side, dual high-side, or half-bridge topologies
• High-speed operation with capacitive coupling for reliable isolation
• Strong drive capability with up to 4A peak source and 6A peak sink outputs

Applications

• Industrial motor drives requiring fast switching response
• Power supplies utilizing half-bridge or full-bridge converter topologies
• Inverter systems needing high-current gate driving with galvanic isolation

Procurement Notes

Verify the complete part number including the suffix 'ADLGR' to ensure correct packaging and tape-and-reel configuration. Confirm that the required isolation voltage rating of 1.6kVRMS meets system safety standards. Check moisture sensitivity levels as indicated in the datasheet to determine proper storage and handling requirements before soldering. Ensure compatibility with the intended control logic voltage levels.

Selection Notes

Select this component when high-speed switching and strong drive currents are necessary for power MOSFETs or IGBTs. The dual-channel design allows for independent control of two switches, suitable for bridge configurations. Consider the 1.6kVRMS isolation barrier if significant voltage differences exist between control and power domains. The WSON package is appropriate for space-constrained PCB layouts requiring efficient thermal performance.

Part Context

This device belongs to the UCC21xxx family of isolated gate drivers from Texas Instruments. These components utilize capacitive isolation technology to provide high common-mode transient immunity. The family includes variants with different channel counts and drive strengths, designed to replace traditional transformer-based or optical isolation solutions in modern power electronics applications.

Replacement Considerations

Direct replacements within the same family may include other UCC2123x variants with adjusted pinouts or drive strengths. Verify pin-to-pin compatibility and isolation ratings before substitution. Cross-reference with similar high-speed dual-channel isolated drivers from other manufacturers only if electrical parameters and package dimensions match exactly.