Texas Instruments UCC27324D

Overview

UCC27324D from Texas Instruments is a dual noninverting low-side MOSFET driver IC delivering ±4-A peak gate drive current at the Miller plateau region, with 20 ns rise / 15 ns fall time (1.8 nF load), 25 ns/35 ns input-to-output propagation delay, and operation across 4.5–15 V supply voltage - used to drive N-channel power MOSFETs in high-frequency switch-mode power supplies.

For engineers reviewing the UCC27324D datasheet, UCC27324D pinout, UCC27324D application, or UCC27324D equivalent, this page delivers verified electrical specs, SOIC-8 package mapping, thermal resistance (107.3°C/W), input threshold independence from VDD, and dual noninverting logic configuration - critical for selecting gate drivers in DC-DC converters and solar inverters.

Technical Context

The UCC27324D implements a Bi-CMOS hybrid output stage combining bipolar and MOSFET transistors in parallel to sustain ±4-A peak current even at low VDD (4.5 V), enabling efficient Miller plateau charging/discharging. Its TTL/CMOS-compatible inputs feature wide hysteresis (VIN_H = 1.6–2.5 V, VIN_L = 0.8–1.5 V) and are fully independent of supply voltage.

It operates exclusively as a low-side driver with dual noninverting outputs (OUTA and OUTB follow INA and INB, respectively), supports output paralleling for 8-A drive, and requires no external Schottky clamps due to low-impedance body-diode handling - confirmed by its 0.4–1.0 Ω low-side output resistance and 0.6–1.5 Ω high-side output resistance.

Key Specifications

Pinout & Package

UCC27324D is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with exposed pad not connected - standard surface-mount footprint compatible with automated assembly and reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TC4424CPA and MIC4424YM, UCC27324D uniquely sustains ±4-A drive down to 4.5 V, guarantees 125°C operation, and embeds input hysteresis - making it the only choice for thermally demanding, wide-input-range industrial gate drive.

Availability

UCC27324D is available at Aetrix Electronics and suitable for switch-mode power supplies, DC-DC converters, and solar inverters requiring stable component supply, long-term lifecycle support, and traceable industrial-grade sourcing.

Supply support for UCC27324D 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 ICs, with over 50 years of innovation in high-reliability power solutions.

The UCC27324D belongs to TI's UCCx732x dual MOSFET driver family, engineered specifically for high-efficiency, high-frequency power conversion - targeting applications where Miller plateau drive strength, thermal robustness, and noise-immune logic interfacing are essential.

FAQ

What is the logic configuration of UCC27324D?

The UCC27324D features dual noninverting outputs: OUTA follows INA and OUTB follows INB with identical polarity. This configuration eliminates external inverters in synchronous rectifier or dual-N-channel half-bridge designs. It is distinct from UCC27323D (dual inverting) and UCC27325D (one inverting, one noninverting), and the logic behavior is fixed per part number - not configurable via pins or registers. The UCC27324D truth table confirms L→L and H→H mapping for both channels.

Does UCC27324D support paralleling of its two outputs?

Yes, UCC27324D supports output paralleling: connect INA to INB and OUTA to OUTB to combine both channels into a single 8-A peak drive output. TI specifies that inputs must be shorted as close to the IC as possible to minimize layout-induced skew, and recommends input slew rates >20 V/µs to ensure matched td1/td2. The UCC27324D's matched Bi-CMOS output stages enable balanced current sharing - verified in Figure 8-4 of the SLUS492K datasheet.

What is the maximum capacitive load UCC27324D can drive while maintaining specified rise/fall times?

The UCC27324D's 20 ns rise / 15 ns fall time is characterized at 1.8 nF load per channel. While it can drive larger loads (e.g., 10 nF), measured rise/fall degrades to ~40 ns - confirmed in Figure 8-5. For >5 nF loads, external gate resistors are recommended to control di/dt and reduce EMI. The UCC27324D's constant-current output architecture ensures predictable timing even under heavy loading, unlike resistive drivers whose speed collapses quadratically with capacitance.

Is UCC27324D suitable for high-temperature environments like solar inverters?

Yes, UCC27324D is rated for –40°C to +125°C junction temperature and features RθJA = 107.3°C/W in SOIC-8, enabling reliable operation in sealed solar inverter enclosures. Its Bi-CMOS output stage maintains ±4-A drive capability across the full temperature range, and its 2000-V HBM ESD rating meets IEC 62109 requirements. Thermal derating curves in Section 6.4 confirm stable performance up to 125°C TJ - unlike commercial-grade alternatives limited to 70°C.

What bypass capacitors are required for stable UCC27324D operation?

UCC27324D requires two VDD bypass capacitors: a 0.1-µF X7R ceramic capacitor placed within 2 mm of Pin 6 (VDD) to GND for high-frequency decoupling, plus a ≥1-µF low-ESR tantalum or ceramic capacitor in parallel for bulk energy delivery during 4-A current pulses. This dual-capacitor strategy prevents VDD droop and ringing - critical because the UCC27324D draws peak currents exceeding 4 A for nanosecond durations during Miller plateau transitions.