UCC27517DBVT

Gate Driver Overview

The UCC27517DBVT is a single-channel high-speed low-side gate driver manufactured by Texas Instruments. It provides symmetrical 4A peak source and sink current to drive MOSFETs and IGBTs. The device operates within a VDD range of 4.5V to 18V and supports an extended temperature range from -40°C to +140°C. Key electrical parameters include a typical propagation delay of 13ns, rise time of 9ns, and fall time of 7ns. It features hysteretic logic with TTL compatibility and includes internal pull-up/pull-down resistors for safe default states.

Gate Driver Feature Summary

• Dual input design supporting both inverting and non-inverting configurations via separate IN+ and IN- pins.
• Internal UVLO circuit maintains output low when supply voltage is outside the operational range.
• Hysteretic logic thresholds provide excellent noise immunity independent of VDD voltage.
• Internal pull-up and pull-down resistors ensure safe low-level output state during power-up or floating inputs.

Gate Driver Applications

• Switch-mode power supplies
• DC-DC converters
• Motor control systems
• Solar inverters and UPS applications

Gate Driver Procurement Notes

Verify the suffix 'VT' indicates cut-tape packaging rather than reel quantities. Confirm the specific temperature grade matches the application requirements, as standard variants may differ from automotive AEC-Q100 qualified versions. Ensure the ordering part number aligns with the required tape width and quantity specifications provided in the official datasheet.

Gate Driver Selection Notes

Select this component for applications requiring compact SOT-23-5 packaging with high-speed switching capabilities. The dual-input architecture allows flexible logic configuration without additional external components. Consider the 4A drive strength sufficient for medium-power MOSFETs and IGBTs while maintaining low propagation delays for efficient digital power control loops.

Gate Driver Part Context

This device belongs to the UCC27517 family of low-side gate drivers. Variants such as UCC27517DBVR differ primarily in packaging format (reel vs. cut tape). Automotive-grade versions like UCC27517AQDBVRQ1 offer AEC-Q100 qualification but may have restricted temperature ranges compared to the commercial DBVT variant.

Gate Driver FAQ

How does the UCC27517 handle unused input pins?

Unused input pins must not be left floating. Internal pull-up and pull-down resistors keep the output low if inputs are unconnected, but proper biasing is required to enable normal operation safely.

What logic levels are compatible with the UCC27517 inputs?

The input thresholds are fixed and compatible with TTL and CMOS low-voltage logic circuits, remaining independent of the VDD supply voltage.