Texas Instruments UCC27324QDRQ1

Overview

UCC27324QDRQ1 from Texas Instruments is a dual-channel, automotive-qualified, low-side MOSFET gate driver delivering ±4-A peak output current at the Miller plateau region, with 20-ns rise and 15-ns fall times into 1.8-nF load, operating from 4 V to 15 V supply, and rated for –40°C to 125°C junction temperature - used in high-frequency DC-DC converters and motor controllers.

For engineers reviewing the UCC27324QDRQ1 datasheet, UCC27324QDRQ1 pinout, UCC27324QDRQ1 application, or UCC27324QDRQ1 equivalent, key selection criteria include peak sink/source capability during Miller plateau, propagation delay asymmetry (25 ns rising-edge vs 35 ns falling-edge), SOIC-8 thermal resistance (R_θJA = 113°C/W), and TTL/CMOS input compatibility independent of V_DD.

Technical Context

The UCC27324QDRQ1 implements TrueDrive™ output architecture using parallel bipolar and MOSFET transistors to deliver high-current sourcing and sinking simultaneously, minimizing shoot-through while maintaining low output impedance across V_DD range. Its input stage features logic-compatible thresholds (V_IL = 1.8–2.7 V, V_IH = 1.6–2.5 V) with hysteresis and 500-mA reverse-current tolerance.

Each channel operates noninverting with independent inputs (INA/INB) and outputs (OUTA/OUTB); dual outputs can be paralleled for up to ±4-A combined drive. The device supports fast switching under automotive thermal stress (T_J = –40°C to 125°C) and meets AEC-Q100 Grade 1 requirements.

Key Specifications

Pinout & Package

UCC27324QDRQ1 is housed in an industry-standard SOIC-8 (D) package measuring 4.90 mm × 3.91 mm, with exposed pad not present and NC pins grounded per datasheet guidance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27324QDRQ1, UCC27524AQDRQ1 offers higher drive strength and ESD rating in identical packaging but with altered bias network, while LM5113QDGSRQ1 trades dual-channel capability for smaller size and higher peak current in a different package - both require validation of layout, thermal, and timing margins before substitution.

Availability

UCC27324QDRQ1 is available at Aetrix Electronics and suitable for automotive ADAS power supplies, industrial DC-DC converters, and motor control systems requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for UCC27324QDRQ1 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 automotive-grade ICs, with over 50 years of power management innovation.

The UCC27324QDRQ1 belongs to TI's automotive-qualified TrueDrive™ gate driver family, engineered specifically for high-reliability, high-speed low-side MOSFET control in safety-critical power conversion systems.

FAQ

What is the maximum allowable supply voltage for UCC27324QDRQ1?

The absolute maximum supply voltage (V_DD) for UCC27324QDRQ1 is 16 V, but the recommended operating range is 4 V to 15 V. Operation above 15 V risks exceeding safe junction temperature limits and may degrade long-term reliability, especially under high-output-current conditions. TI specifies 15 V as the upper limit for continuous operation across the full –40°C to 125°C temperature range. Always observe derating curves in Section 5.1 of the SLUS678D datasheet when operating near maximum ratings.

Can UCC27324QDRQ1 drive both high-side and low-side MOSFETs?

No, UCC27324QDRQ1 is a dedicated low-side gate driver only - its outputs (OUTA/OUTB) swing between GND and V_DD, with no floating supply or level-shifting capability. It cannot directly drive high-side N-channel MOSFETs requiring gate voltages above the source potential. For high-side drive, a dedicated high-side or half-bridge driver (e.g., UCC27201A, LM5109B) must be used. UCC27324QDRQ1 is designed exclusively for low-side N-MOSFET or IGBT gate control in buck, flyback, motor phase, and Class D topologies.

How does the UCC27324QDRQ1 handle Miller plateau current demand?

UCC27324QDRQ1 delivers ±4-A peak current specifically during the Miller plateau region via its TrueDrive™ hybrid output stage - combining bipolar and MOSFET transistors in parallel to sustain high current at low V_GS (≈5 V). This is verified per Figure 7-3 and 7-4 test circuits in SLUS678D, where it sinks 4.28 A and sources 3.7 A at V_DD = 12 V. Unlike resistive-output drivers, this constant-current behavior minimizes plateau duration, reducing switching losses and improving efficiency in high-Q_g MOSFET applications.

Is UCC27324QDRQ1 pin-compatible with standard SOIC-8 gate drivers like TC4420?

No, UCC27324QDRQ1 is not pin-compatible with TC4420 or other generic SOIC-8 drivers. Its pinout (INA, GND, INB, OUTB, VDD, OUTA, NC, NC) differs significantly - TC4420 uses IN, GND, VDD, OUT arrangement. Attempting direct replacement would cause incorrect signal routing and potential damage. While both are SOIC-8 packaged, UCC27324QDRQ1's dual-channel, automotive-qualified layout and NC pin placement require dedicated PCB design. Always verify pin functions using Table 4-1 in SLUS678D before layout reuse.

What thermal considerations apply when operating UCC27324QDRQ1 at 125°C junction temperature?

At T_J = 125°C, UCC27324QDRQ1's power dissipation must be limited to ≤300 mW based on R_θJA = 113°C/W and ambient assumptions - requiring careful thermal design. Use minimum 2 oz copper, thermal vias under the exposed area (though no thermal pad exists), and short, wide GND/VDD traces. Derate output current if sustained high-frequency operation exceeds 650 mW total dissipation (per Section 5.6). TI recommends monitoring case temperature near Pin 3 (GND) and validating with IR thermography in final assembly, especially in sealed automotive enclosures.