Texas Instruments UCC27524DR

Overview

UCC27524 from Texas Instruments is a dual-channel, high-speed, low-side gate driver IC designed to drive MOSFETs and IGBTs in power-switching circuits. It delivers 5A peak source/sink current per channel, features 17ns typical propagation delay, 1ns typical inter-channel delay matching, and operates across 4.5V–18V VDD with –40°C to +150°C junction temperature range - enabling robust GaN and SiC gate drive in high-frequency SMPS.

For engineers reviewing the UCC27524 datasheet, UCC27524 pinout, UCC27524 application, or UCC27524 equivalent, key selection considerations include its independent-enable architecture, –5V input voltage tolerance, TTL/CMOS-compatible logic thresholds independent of VDD, rail-to-rail output swing, and SOIC-8/HVSSOP-8/WSON-8 package options for thermal and layout flexibility.

Technical Context

The UCC27524 integrates two independent non-inverting gate drivers with separate enable inputs (ENA/ENB), each featuring hybrid pull-up output stage (P-MOS + transient N-MOS boost) for 5A peak sourcing during Miller plateau. Its input and enable thresholds are fixed (e.g., VIN_H = 2.0V typ, VIN_L = 1.0V typ) and supply-independent, with 1V hysteresis for noise immunity.

UVLO (4.1V rising / 3.8V falling) holds both outputs low at power-up/down; internal INx pulldown (120kΩ) and ENx pullup (200kΩ) ensure safe default states. The device supports parallel-channel operation for doubled drive current or synchronous dual-switch control with matched timing critical for synchronous rectifiers.

Key Specifications

Pinout & Package

UCC27524 is available in SOIC-8 (D), HVSSOP-8 PowerPAD™ (DGN), and WSON-8 (DSD) packages. All variants share identical pin numbering and function mapping per TI SLUSFA9 (June 2024).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side dual gate driver applications.

Compared with UCC27524, UCC27525DR offers identical timing and drive strength but inverted logic - making it a functional alternative only when signal inversion is acceptable. LM5113SD/NOPB trades off negative input tolerance and peak current for lower cost and simpler biasing, limiting suitability to less demanding Si-based topologies.

Availability

UCC27524 is available at Aetrix Electronics and suitable for switch-mode power supplies, motor control systems, solar DC-DC converters, and GaN/SiC gate drive applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for UCC27524 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in power management and signal chain solutions.

The UCC27524 belongs to TI's high-speed gate driver product line, engineered specifically for high-efficiency, high-frequency power conversion systems using wide-bandgap devices - emphasizing precision timing, noise resilience, and thermal robustness in demanding industrial and computing applications.

FAQ

What is the maximum negative voltage the UCC27524 inputs can tolerate?

The UCC27524 inputs (INA, INB, ENA, ENB) tolerate –5V DC in the D and DGN packages, as specified in Absolute Maximum Ratings. This rating applies regardless of VDD level and enables direct interface with noisy gate-drive feedback loops without external protection components. The DSD package has a lower –0.3V minimum input rating and must be used accordingly.

Does the UCC27524 support paralleling of its two output channels?

Yes, the UCC27524 supports paralleling of OUTA and OUTB to achieve up to 10A peak drive current. Its 1ns typical delay matching and rail-to-rail output structure ensure balanced current sharing. When paralleling, connect INA to INB and ENA to ENB, and route outputs with matched trace lengths to preserve timing integrity and minimize loop inductance.

How does the UCC27524 behave during VDD undervoltage lockout (UVLO)?

During VDD UVLO, the UCC27524 holds both OUTA and OUTB low to prevent partial or glitchy switching of power devices. The UVLO rising threshold is 4.1V typical (3.8–4.4V), with 0.3V hysteresis. This ensures predictable, glitch-free startup and shutdown behavior - a critical feature for functional safety in industrial and automotive power systems using UCC27524.

What package options are available for the UCC27524, and how do they differ thermally?

The UCC27524 is offered in SOIC-8 (D), HVSSOP-8 PowerPAD™ (DGN), and WSON-8 (DSD) packages. Thermally, the DGN package has RθJA = 48.9°C/W and RθJB = 22.3°C/W; the D package has higher RθJA = 126.4°C/W; the DSD package achieves lowest RθJA = 46.7°C/W and RθJB = 22.4°C/W. All support operation up to +150°C junction temperature.

Is the UCC27524 pin-compatible with earlier TI gate drivers like the UCC27324?

Yes, the UCC27524 is pin-compatible with the UCC27324 in SOIC-8 and HVSSOP-8 packages. Pin 1 (ENA) and Pin 8 (ENB) are internally pulled up, allowing them to float - matching the N/C pins of UCC27324. No PCB changes are required for drop-in replacement, though UCC27524 adds –5V input tolerance, tighter delay matching, and enhanced UVLO behavior not present in UCC27324.