UCC21551DQDWKRQ1

Overview

The UCC21551DQDWKRQ1 is an automotive-grade, dual-channel optically isolated gate driver from Texas Instruments. It features a SOIC-14 package and supports junction temperatures from -40°C to +150°C. The device provides up to 4-A peak source and 6-A peak sink output currents with a 5k VRMS insulation voltage. Key electrical parameters include a maximum propagation delay of 45 ns, rise and fall times of 8 ns each, and a power dissipation of 950 mW. It operates with supply voltages ranging from 13 V to 25 V for the outputs and accepts logic inputs compatible with CMOS and TTL standards.

Feature Summary

• Dual-channel configuration supporting universal low-side, high-side, or half-bridge topologies
• Optical isolation providing reinforced safety barrier between input and output domains
• Automotive qualification ensuring reliability under extended temperature conditions

Applications

• Automotive inverter systems
• On-board charger (OBC) circuits
• DC-DC converter stages

Procurement Notes

Verify the complete part number including suffixes such as DQDWKRQ1 to ensure correct packaging and automotive grade compliance. Confirm RoHS status and moisture sensitivity level requirements prior to ordering. Cross-reference the manufacturer datasheet for specific handling instructions related to humidity-sensitive devices.

Selection Notes

Select this component when dual-channel optical isolation is required for automotive power electronics. Ensure the design accommodates the 5k VRMS isolation rating and the specific output current capabilities of 4A source and 6A sink. Verify that the system operating temperature remains within the specified -40°C to +150°C range for reliable performance.

Part Context

This device belongs to the UCC21551-Q1 series of automotive isolated gate drivers. It is designed to replace traditional discrete solutions by integrating dual channels into a single compact package. The series targets high-reliability applications where galvanic isolation is critical for system safety and noise immunity.

Replacement Considerations

Check for direct substitutes within the UCC21551 family or other TI automotive isolated gate drivers with matching pinouts and isolation ratings.