UCC5681PW28

Overview

The UCC5681PW28 is a high-speed, low-side gate driver manufactured by Texas Instruments under the Unitrode brand. It features a single-channel output designed to drive power MOSFETs and IGBTs with peak currents of 3A source and 4A sink. The device operates within a supply voltage range of 4.5V to 20V and supports input logic levels compatible with 1.65V, 3.3V, and 5V systems. It includes built-in protections such as shoot-through prevention and thermal shutdown. The component is housed in a TSSOP-28 package and is rated for operation across an industrial temperature range.

Feature Summary

• Integrated shoot-through prevention mechanism to minimize cross-conduction losses in half-bridge configurations
• High peak output current capability for rapid switching of power devices
• Wide operating supply voltage range supporting various logic families
• Built-in thermal shutdown protection for enhanced system reliability

Applications

• Half-bridge and full-bridge DC-DC converter topologies
• Motor control applications requiring precise gate driving
• Industrial power supplies and inverters

Procurement Notes

Verify the manufacturer designation on the datasheet, as the component may be listed under Texas Instruments rather than Unitrode due to corporate acquisitions. Confirm the specific suffix 'PW28' corresponds to the TSSOP-28 package variant. Ensure compatibility with your target voltage levels and check for any updated revision notes regarding pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this driver when high-speed switching with robust protection is required for low-side power devices. Consider its wide supply voltage range and logic compatibility if interfacing with diverse microcontrollers. Evaluate the thermal performance requirements against the integrated shutdown feature. Compare peak current capabilities against the gate charge requirements of the intended MOSFETs or IGBTs to ensure adequate drive strength.

Part Context

This component belongs to the family of high-performance gate drivers originally developed by Unitrode, now managed by Texas Instruments. These devices are engineered for efficient power conversion and motor control applications. The integration of protection features like shoot-through prevention distinguishes them from basic buffer drivers, offering higher reliability in demanding industrial environments.

Replacement Considerations

Consult official substitution guides for equivalent low-side drivers with similar current ratings and package types. Verify that alternative components support the same input logic voltages and supply ranges. Ensure mechanical footprint compatibility if replacing in existing designs.