Texas Instruments UCC27282DR

Overview

UCC27282DR from Texas Instruments is a 3-A, 120-V half-bridge gate driver IC for N-channel MOSFETs in synchronous buck and half-bridge topologies. It features ±3-A peak output current, 16-ns typical propagation delay, 12-ns/10-ns rise/fall time (1.8-nF load), 1-ns typical delay matching, and integrated bootstrap diode - enabling high-efficiency switching in telecom power supplies and motor drives.

For engineers reviewing the UCC27282DR datasheet, UCC27282DR pinout, UCC27282DR application, or UCC27282DR equivalent, this page delivers verified technical context, real-world timing behavior, thermal performance data for SON10 package, cross-conduction protection logic, and validated alternative drivers for high-side/low-side control in 100-V switch-node systems.

Technical Context

The UCC27282DR implements independent TTL/CMOS-compatible HI/LI inputs with input interlock logic that forces both HO and LO low during simultaneous high input states - preventing shoot-through without adding fixed dead time. Its robust level shifter supports 100-V HS node operation with <1-ns delay matching between high-side and low-side outputs.

UVLO is implemented separately on VDD (5.0-V typical rising threshold) and HB–HS (3.7-V typical rising threshold), ensuring safe startup and fault response. The integrated bootstrap diode (VF = 0.85 V typ. at 80 mA) eliminates external diode requirements while maintaining 120-V absolute max HB voltage rating.

Key Specifications

Pinout & Package

UCC27282DR is packaged in a 10-pin VSON (DRC) with exposed thermal pad (3 mm × 3 mm), optimized for high-power density PCB layouts and thermal dissipation via direct connection to ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge gate driver applications.

Compared with UCC27282DR, UCC27289DR offers higher peak current but removes EN control, while IRS2005MTRPBF extends voltage range at the cost of added components and degraded timing precision - making UCC27282DR optimal for compact, EN-enabled, 100-V half-bridge designs demanding tight delay matching.

Availability

UCC27282DR is available at Aetrix Electronics and suitable for telecom power supplies, motor drives, auxiliary inverters, and Class-D audio amplifiers requiring stable component supply, full production traceability, and long-term lifecycle support.

Supply support for UCC27282DR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability gate driver design.

The UCC27282DR belongs to TI's high-performance gate driver product line, engineered specifically for high-efficiency, high-density half-bridge and synchronous-buck power stages operating up to 100-V switch-node voltage.

FAQ

What is the maximum allowable voltage on the HS pin of the UCC27282DR?

The UCC27282DR specifies an absolute maximum HS voltage of 100 V DC and –14 V for transient conditions lasting less than 100 ns. This rating enables reliable operation in 48-V and 60-V bus applications with margin for inductive kickback. Exceeding 100 V risks permanent damage, and the device includes dedicated HB–HS UVLO (3.7-V rising threshold) to disable HO before unsafe conditions arise. Always verify HS node clamping in your layout.

Does the UCC27282DR require an external bootstrap diode?

No, the UCC27282DR integrates a bootstrap diode with 0.85-V typical forward voltage at 80 mA, eliminating the need for an external diode in most designs. This integration saves PCB area and reduces component count. However, the external bootstrap capacitor remains mandatory - typically 0.1 µF ceramic placed close to HB and HS pins. The integrated diode supports up to 120-V HB voltage but is not rated for reverse recovery in high-dV/dt environments beyond datasheet limits.

How does the input interlock feature work in the UCC27282DR?

The UCC27282DR's input interlock asserts when both HI and LI are simultaneously high, forcing HO and LO low immediately - preventing shoot-through without introducing fixed dead time or propagation delay penalty. This logic operates independently of EN status and UVLO conditions. Once either input goes low, normal operation resumes with no hysteresis or filtering delay. The feature is implemented in silicon and verified across –40°C to +140°C, making it suitable for noisy industrial motor-control environments.

What is the purpose of the EN pin on the UCC27282DR, and how is it used?

The EN pin on the UCC27282DR (available only in DRC package) provides system-level enable/disable control: pulling EN ≥1.54 V activates the driver, while ≤1.21 V or floating (due to internal 250-kΩ pulldown) disables both outputs and reduces VDD current to 7 µA. It responds within 18 µs (enable) and 1.5 µs (disable). EN is commonly tied to microcontroller GPIO or fault comparator outputs for rapid shutdown during overtemperature or overcurrent events in motor drives and power supplies.

Can the UCC27282DR drive both high-side and low-side N-channel MOSFETs in a synchronous buck converter?

Yes, the UCC27282DR is explicitly designed for synchronous buck and half-bridge topologies using two N-channel MOSFETs. Its floating high-side driver supports HS node voltages up to 100 V, and the integrated bootstrap diode enables self-powered high-side gate drive. The matched 16-ns propagation delays and 1-ns delay matching between HO and LO allow precise dead-time control - critical for minimizing conduction losses and preventing shoot-through in high-efficiency buck regulators used in telecom and computing power supplies.