Texas Instruments UCC27282D

Overview

UCC27282D 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 UCC27282D datasheet, UCC27282D pinout, UCC27282D application, or UCC27282D equivalent, key selection considerations include cross-conduction protection via input interlock, –14-V absolute maximum HS negative voltage tolerance, 5-V typical UVLO, enable/disable functionality (DRC package), and operation across –40°C to 140°C junction temperature.

Technical Context

The UCC27282D implements independent TTL/CMOS-compatible HI/LI inputs with internal interlock logic that forces both HO and LO low during input overlap - preventing shoot-through without adding fixed dead time. Its robust level shifter enables high-side drive referenced to the HS node up to 100 V, with propagation delay and delay matching tightly controlled (≤7 ns max mismatch) to minimize required external dead time.

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 supports self-biased high-side operation while reducing BOM count; the device tolerates –5-V input transients and –14-V HS transients, enhancing ruggedness in noisy, high-dV/dt environments.

Key Specifications

Pinout & Package

UCC27282D is supplied in the DRC package: 10-pin VSON (3 mm × 3 mm) with exposed thermal pad. This thermally enhanced package supports high-power density layouts and improves junction-to-board thermal resistance (R_θJB = 21.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27282D, UCC27289DR trades EN functionality and integrated bootstrap for smaller footprint, while LM5109BMAX offers lower cost and drive strength at the expense of interlock protection and bootstrap integration - making UCC27282D optimal for high-reliability, high-density, and noise-immune half-bridge designs.

Availability

UCC27282D is available at Aetrix Electronics and suitable for telecom power supplies, motor drives, auxiliary inverters, and Class-D audio amplifiers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for UCC27282D 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 power conversion solutions.

The UCC27282D belongs to TI's high-performance gate driver product line, engineered specifically for efficient, robust, and noise-immune control of N-channel MOSFETs in high-frequency, high-voltage half-bridge and synchronous-buck applications.

FAQ

What is the maximum allowable voltage on the HS pin of the UCC27282D?

The UCC27282D specifies an absolute maximum HS voltage of 100 V DC with respect to VSS. It also tolerates –14 V transients (pulse width <100 ns), enabling reliable operation in high-dV/dt motor drive and inverter applications where inductive kickback occurs. Exceeding 100 V DC risks permanent damage per Absolute Maximum Ratings.

Does the UCC27282D require an external bootstrap diode?

No - the UCC27282D integrates a bootstrap diode rated for 80 mA continuous forward current. This eliminates the need for an external diode in most applications, reducing component count and PCB area. However, designers must still place an external bootstrap capacitor (typically 0.1 μF) between HB and HS pins.

How does the input interlock feature work in the UCC27282D?

The UCC27282D's input interlock forces both HO and LO outputs low whenever HI and LI inputs are simultaneously high - preventing shoot-through without adding fixed dead time or degrading propagation delay. This hardware-level protection operates independently of controller timing and enhances system robustness in electrically noisy environments.

What is the purpose of the EN pin on the UCC27282D?

The EN pin on the UCC27282D (available only in the DRC package) provides active-high enable/disable control. When pulled above 1.54 V, the driver operates normally; when ≤1.21 V or floating, both outputs are held low and quiescent current drops to 7 µA. This enables system-level fault response, power sequencing, and standby mode control.

Can the UCC27282D drive GaN FETs?

Yes - the UCC27282D's ±3-A peak current, 12-ns/10-ns rise/fall times, and low 1-ns delay matching make it suitable for driving enhancement-mode GaN FETs in high-frequency totem-pole PFC and LLC converters. Ensure gate loop inductance is minimized and VGS clamp protection is implemented, as GaN devices have lower threshold voltage and higher dV/dt sensitivity than silicon MOSFETs.