UCC21551ADWKR

Overview

The UCC21551ADWKR is a dual-channel optically isolated gate driver from Texas Instruments, housed in a 14-pin SOIC package. It delivers a peak source current of 4A and a peak sink current of 6A to drive power MOSFETs, SiC, and IGBT transistors. The device provides 5000 VRMS reinforced isolation between input and output channels. Key electrical parameters include a maximum propagation delay of 45 ns, with rise and fall times of 8 ns each. It operates within a junction temperature range of -40°C to +150°C and supports supply voltages from 13V to 25V.

Feature Summary

• Provides reinforced optical isolation for high-voltage noise immunity
• Capable of driving wide-bandgap semiconductors like SiC and standard IGBTs
• Supports flexible configurations including dual low-side, dual high-side, or half-bridge topologies

Applications

• Industrial motor drives
• Solar inverters
• Uninterruptible power supplies (UPS)

Procurement Notes

Verify the specific suffix 'DWKR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 14-SOIC footprint matches the target PCB design constraints. Ensure the 5000 VRMS isolation rating meets the safety standards applicable to the final equipment classification. Cross-reference the operating temperature range against the environmental conditions of the intended deployment site.

Selection Notes

Select this component when reinforced isolation is mandatory for system safety compliance. Choose this part over capacitive isolators if optical isolation characteristics are preferred for specific noise environments. Consider the 4A/6A drive strength sufficient for the target switch capacitance at the desired switching frequency. Evaluate the 45 ns propagation delay against the timing requirements of the control logic.

Part Context

This device belongs to the UCC21551x family of dual-channel isolated gate drivers. It shares architectural similarities with other members of the series but is distinguished by its optocoupler-based isolation technology. The family targets applications requiring robust galvanic separation in power conversion systems. It complements Texas Instruments' broader portfolio of magnetic and capacitive isolation solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs before considering alternative isolated gate drivers.