Texas Instruments UCC27524P

Overview

UCC27524 from Texas Instruments is a dual-channel, high-speed, low-side gate driver IC designed for MOSFET and IGBT switching in power conversion stages. It delivers 5A peak source/sink current per channel, features 17ns typical propagation delay, 1ns typical inter-channel delay matching, and supports –5V tolerant inputs - enabling robust operation in noisy, high-dV/dt environments such as GaN-based DC-DC converters.

For engineers reviewing the UCC27524 datasheet, UCC27524 pinout, UCC27524 application, or UCC27524 equivalent, this page provides verified technical context, real-world design meaning of key specs (e.g., UVLO thresholds, input hysteresis, thermal resistance), package-specific pin functions, and two validated alternative drivers with documented functional and layout implications.

Technical Context

The UCC27524 uses a hybrid pull-up output stage combining P- and N-channel MOSFETs to deliver boosted 5A peak source current during the Miller plateau, while maintaining rail-to-rail swing and <10ns rise/fall times into 1.8nF loads. Its TTL/CMOS-compatible inputs feature fixed 2V/1V thresholds with 1V hysteresis - independent of VDD - ensuring reliable logic-level interfacing across 3.3V and 5V controllers.

Each channel has independent enable (ENA/ENB) with internal 200kΩ pull-up, allowing floating-pin compatibility with UCC27324. Internal GND pulldown on INA/INB ensures outputs default LOW during floating conditions, and VDD UVLO (4.1V rising, 3.8V falling) guarantees glitch-free startup/shutdown behavior.

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 gate driver applications.

Compared with UCC27524, UCC27525 offers identical performance in an inverting configuration but demands signal inversion upstream, while LM5113 trades negative-voltage robustness and enable flexibility for higher peak current - making UCC27524 the optimal choice for GaN/SiC designs requiring noise immunity and adaptive control.

Availability

UCC27524 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 assurance, and traceable sourcing for production ramp.

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 leader specializing in analog, embedded processing, and power management technologies, with over 50 years of innovation in high-reliability power solutions.

The UCC27524 belongs to TI's high-speed gate driver product line, engineered specifically for high-frequency, high-efficiency power conversion using wide-bandgap semiconductors - emphasizing noise immunity, timing precision, and robustness in harsh EMI environments.

FAQ

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

The UCC27524 inputs (INA, INB, ENA, ENB) tolerate –5V in D and DGN packages per Absolute Maximum Ratings. This capability allows direct interface with nodes experiencing negative coupling transients - such as bootstrap gate drive circuits - without external clamping diodes. The DSD package limits input to –0.3V, so package selection must align with system-level transient requirements. UCC27524's –5V rating is confirmed in Section 6.1 of TI SLUSFA9.

Does the UCC27524 support paralleling its two outputs for higher current drive?

Yes, the UCC27524 explicitly supports paralleling OUTA and OUTB by connecting INA to INB and ENA to ENB, delivering up to 10A peak source/sink current. This is validated in the device description and Figure 7-1 output structure. Matching 1ns typical delay between channels ensures simultaneous switching, minimizing imbalance. UCC27524's hybrid pull-up architecture maintains low impedance during Miller plateau even under paralleled operation.

How does the UCC27524 ensure glitch-free operation during power-up and power-down?

The UCC27524 incorporates VDD UVLO with 4.1V rising and 3.8V falling thresholds. When VDD drops below 3.8V or rises below 4.1V, both outputs are actively held LOW - preventing partial turn-on of power switches. This behavior is guaranteed across –40°C to +150°C and is documented in Section 6.5. UCC27524's UVLO hysteresis (0.3V) further avoids oscillation near threshold, ensuring clean state transitions.

What is the purpose of the internal pull-down resistors on INA and INB pins?

The UCC27524 integrates 120kΩ internal pulldown resistors on INA and INB to force OUTA and OUTB LOW when those inputs are unconnected or floating. This satisfies safety standards (e.g., IEC 62368-1) requiring defined gate states during controller reset or open-circuit faults. It eliminates need for external resistors in most designs. UCC27524's pulldown behavior is specified in Table 5-1 and Section 4 of SLUSFA9.

Can the UCC27524 drive both MOSFETs and IGBTs effectively?

Yes, the UCC27524 is explicitly characterized for driving both MOSFETs and IGBTs, delivering ±5A peak current into capacitive loads with rail-to-rail swing and <10ns rise/fall times. Its 17ns propagation delay and low output impedance (ROL = 0.6–1.1Ω, ROH = 5–8.5Ω) ensure fast, low-loss switching of high-Qg devices. TI's datasheet confirms IGBT compatibility in Section 3 and Application section "Gate drive for emerging wide band-gap power devices such as GaN" - which extends to IGBTs due to shared gate-drive requirements.