Texas Instruments UCC27524DGN

Overview

UCC27524 from Texas Instruments is a dual-channel, high-speed, low-side gate driver IC designed for driving MOSFETs and IGBTs 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 operates from 4.5V to 18V 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 UCC27524 datasheet, UCC27524 pinout, UCC27524 application, or UCC27524 equivalent, this page provides verified functional identity, validated SOIC-8/HVSSOP-8 package mapping, confirmed dual non-inverting logic architecture, real-world timing specs (t_D1/t_D2 = 17ns typ), and two field-validated alternative gate drivers with documented parameter trade-offs.

Technical Context

The UCC27524 implements independent dual non-inverting output stages with hybrid pull-up architecture: a P-channel MOSFET for steady-state drive and an N-channel MOSFET briefly activated during turn-on to deliver boosted 5A peak source current into Miller plateau regions. Each channel includes dedicated enable (ENA/ENB) and input (INA/INB) pins with TTL/CMOS-compatible thresholds fixed at ~2V high / ~1V low, independent of VDD.

Internal GND pulldown resistors (120 kΩ on INA/INB) and VDD pullup resistors (200 kΩ on ENA/ENB) ensure defined LOW outputs during floating conditions and pin-to-pin compatibility with UCC27324. UVLO (4.1V rise / 3.8V fall) holds both outputs LOW during power-up/down, while –5V input tolerance enhances noise immunity in harsh EMI environments.

Key Specifications

Pinout & Package

HVSSOP-8 (DGN) package: 3.00mm × 3.00mm body with exposed thermal pad; pin-compatible with SOIC-8 (D) but with improved thermal resistance (R_θJA = 48.9°C/W vs. 126.4°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27524, UCC27525DR offers identical performance in half the footprint but lacks channel independence, while LM5113SDX trades 8ns slower timing and no negative input capability for lower unit cost in benign environments.

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 support, 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 90 years of innovation in high-reliability components.

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 and demanding industrial/motor control applications.

FAQ

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

The UCC27524 inputs (INA, INB, ENA, ENB) tolerate –5V DC per absolute maximum ratings in the D and DGN packages. This rating is explicitly validated and enables direct connection to noisy gate nodes without external clamping. The UCC27524 maintains functional integrity and avoids latch-up under this condition, making it suitable for high-dV/dt GaN-based designs where gate ringing commonly exceeds –3V.

Can the two outputs of the UCC27524 be paralleled for higher current drive?

Yes, the UCC27524 outputs (OUTA and OUTB) can be safely paralleled due to its 1ns typical inter-channel delay matching and matched rise/fall characteristics. When paralleled with shared INA/INB and ENA/ENB connections, the UCC27524 delivers up to 10A peak source/sink current. Layout must ensure symmetrical trace lengths and common ground return to preserve timing alignment and avoid current imbalance.

Does the UCC27524 require external pull-up or pull-down resistors on its input pins?

No, the UCC27524 does not require external pull-up or pull-down resistors on INA or INB: each has a factory-trimmed 120 kΩ internal pulldown resistor that forces OUTA/OUTB LOW when floating. Similarly, ENA and ENB feature 200 kΩ internal pullups to VDD, enabling default-enable operation with pins left unconnected - a key enabler of pin compatibility with UCC27324.

What is the purpose of the UVLO function in the UCC27524?

UCC27524 incorporates a VDD undervoltage lockout (UVLO) with 4.1V turn-on and 3.8V turn-off thresholds. During UVLO, both outputs are actively held LOW - preventing partial or erratic switching of power devices during brown-out or soft-start conditions. This ensures glitch-free power-up sequencing and protects downstream FETs from undefined gate states, a critical safety feature in industrial and automotive power systems.

How does the UCC27524 achieve 5A peak source current without excessive die heating?

The UCC27524 achieves 5A peak source current via a hybrid pull-up stage: a P-channel MOSFET handles steady-state drive, while an N-channel MOSFET is briefly activated only during the Miller plateau region of turn-on. This transient boost delivers high current exactly when needed - minimizing average power dissipation. Thermal metrics (R_θJA = 48.9°C/W for DGN) confirm safe operation at full 5A pulses in typical PCB layouts with thermal pad soldering.