Texas Instruments UCC27524D

Overview

UCC27524D 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 5-A peak source/sink current per channel, features 17-ns typical propagation delay, 1-ns typical inter-channel delay matching, and operates across 4.5 V to 18 V supply with –40°C to 150°C junction temperature range - enabling robust control of GaN and SiC switches in high-frequency SMPS.

For engineers reviewing the UCC27524D datasheet, UCC27524D pinout, UCC27524D application, or UCC27524D equivalent, this page provides verified technical context, SOIC-8 package mapping, real-world timing and drive capability data, and validated alternative options for synchronous rectification, DC–DC conversion, and motor control designs.

Technical Context

The UCC27524D implements two independent non-inverting gate-drive channels with TTL/CMOS-compatible input thresholds fixed at ~2 V (high) and ~1 V (low), independent of VDD. Each channel includes dedicated enable (ENA/ENB) with internal 200-kΩ pullup and input pulldown (120 kΩ), ensuring outputs remain LOW during floating or undervoltage conditions.

Its hybrid output stage uses parallel N- and P-channel MOSFETs: an N-MOSFET briefly activates during turn-on to boost peak source current to 5 A, while the P-MOSFET provides steady-state pull-up (ROH ≈ 5–8.5 Ω). The architecture minimizes shoot-through and supports rail-to-rail swing with 6 ns (rise) / 10 ns (fall) typical switching into 1.8 nF loads.

Key Specifications

Pinout & Package

UCC27524D is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, with exposed pad not present. Pin functions are electrically and mechanically defined per TI SLUSFA9 (June 2024).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27524D, UCC27524DR offers superior thermal dissipation in compact layouts, while LM5113SD trades dual-channel precision for lower unit cost and simpler routing - making UCC27524D the balanced choice for timing-critical, thermally moderate dual-switch systems.

Availability

UCC27524D is available at Aetrix Electronics and suitable for switch-mode power supplies, DC–DC converters, and motor control systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and automotive-grade production.

Supply support for UCC27524D 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 and embedded processing technologies, with decades of expertise in power management ICs and high-reliability industrial components.

The UCC27524D belongs to TI's UCC275xx family of high-speed gate drivers, engineered specifically for high-efficiency, high-frequency power conversion systems using wide-bandgap devices and demanding synchronous rectification topologies.

FAQ

What is the maximum negative voltage the UCC27524D inputs can tolerate?

The UCC27524D inputs (INA, INB, ENA, ENB) tolerate –5 V DC in the D and DGN packages, as specified in Absolute Maximum Ratings. This rating applies regardless of VDD level and enables direct interfacing with level-shifted or noisy gate-control signals without external clamping. The UCC27524D maintains functional integrity under this stress condition, supporting robust operation in harsh EMI environments typical of motor drives and solar inverters.

Does the UCC27524D support paralleling its two outputs for higher current drive?

Yes, the UCC27524D supports paralleling OUTA and OUTB to deliver up to 10-A peak current, enabled by its 1-ns typical inter-channel delay matching and rail-to-rail output structure. To implement this, connect INA to INB and ENA to ENB, then tie OUTA and OUTB together externally. The UCC27524D datasheet explicitly confirms this configuration for increased drive capability - a key differentiator versus non-matched dual drivers.

What happens to the outputs of the UCC27524D during VDD undervoltage lockout (UVLO)?

During VDD UVLO, both OUTA and OUTB are actively held LOW - a guaranteed state enforced by internal circuitry. The UCC27524D's UVLO rising threshold is 4.1 V (typical), with 0.3 V hysteresis, ensuring glitch-free startup and shutdown. This behavior prevents unintended power-switch turn-on during brown-out conditions, directly supporting safety-critical requirements in industrial and automotive power systems using the UCC27524D.

Is the UCC27524D pin-to-pin compatible with earlier TI gate drivers like the UCC27324?

Yes, the UCC27524D is pin-to-pin compatible with the UCC27324 in SOIC-8 (D) package. Pin 1 (ENA) and Pin 8 (ENB) are internally pulled up and allowed to float - matching the UCC27324's N/C pins. All other pins (INA, INB, GND, VDD, OUTA, OUTB) retain identical function and placement. This enables drop-in replacement in existing designs while adding enhanced features including –5 V input tolerance and tighter delay matching.

What is the recommended minimum input pulse width for reliable switching of the UCC27524D?

The UCC27524D specifies a minimum input pulse width of 10 ns (typical) for the D and DGN packages, measured with 1.8-nF load and 0–3.3 V input transition. This value ensures full output transition (20% to 80%) and accounts for internal propagation and slew-rate limitations. For robust design, maintain ≥15 ns pulses in production systems to accommodate process variation and temperature drift - a requirement clearly documented in the UCC27524D switching characteristics table.