Texas Instruments UCC27322DGNR

Overview

UCC27322DGNR from Texas Instruments is a non-inverting 9-A peak-current low-side MOSFET driver in thermally enhanced MSOP-PowerPAD™ (8-pin) package, delivering 20-ns rise/fall times with 10-nF load and 25/35-ns propagation delays (falling/rising input), designed for high-dV/dt switching in DC-DC converters and motor controllers.

For engineers reviewing the UCC27322DGNR datasheet, UCC27322DGNR pinout, UCC27322DGNR application, or UCC27322DGNR equivalent, key selection criteria include ±9-A Miller plateau drive capability, TTL/CMOS-compatible input thresholds independent of VDD, enable functionality with 100-kΩ internal pull-up, thermal resistance of 4.7°C/W (θjc), and operation across –40°C to +105°C.

Technical Context

The UCC27322DGNR implements a hybrid TrueDrive output stage combining bipolar and MOSFET transistors to deliver ±9-A peak current specifically during the Miller plateau region, minimizing shoot-through risk while maintaining efficient sourcing at low supply voltages (4.5–15 V). Its dual-ground architecture separates AGND (control logic reference) and PGND (power FET source reference) to suppress noise coupling.

Enable functionality on Pin 3 provides active-high logic control with 1.7–2.7-V threshold and 0.25–0.9-V hysteresis; when disabled, OUT forces low regardless of IN state. Input thresholds (VIN_H = 1.6–2.5 V, VIN_L = 0.8–1.5 V) remain stable across VDD range and support direct interfacing with PWM controllers, DSPs, or logic gates.

Key Specifications

Pinout & Package

UCC27322DGNR uses an 8-pin MSOP-PowerPAD™ (DGN) package with exposed thermal pad (3.00 mm × 3.00 mm body size) requiring solder connection to PCB ground plane for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27322DR, UCC27322DGNR offers 6.4× lower junction-to-case thermal resistance and 4.6× higher power dissipation, enabling higher-current operation in compact layouts; versus UCC27522DGNR, it trades integrated gate resistance and lower EMI for 80% higher peak current - critical for driving large Si MOSFETs in high-power SMPS.

Availability

UCC27322DGNR is available at Aetrix Electronics and suitable for switch mode power supplies, motor controllers, and Class-D amplifiers requiring stable component supply, long-term industrial lifecycle support, and guaranteed thermal performance in high-density PCB layouts.

Supply support for UCC27322DGNR 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 decades of expertise in high-reliability power conversion solutions.

The UCC2732x family was engineered for high-current, high-speed gate driving in demanding power systems - targeting applications where extreme Miller current, thermal constraints, and precise timing control define system performance.

FAQ

What is the maximum allowable supply voltage for UCC27322DGNR?

The absolute maximum supply voltage (VDD) for UCC27322DGNR is 16 V, but the recommended operating range is 4.5 V to 15 V per TI's SLUS504I datasheet. Operation above 15 V risks exceeding safe junction temperature limits and may degrade long-term reliability, especially under high-output-current conditions. The device's internal protection circuits do not clamp overvoltage - external rail clamping or regulator supervision is required if transient excursions beyond 15 V are possible in the system.

Does UCC27322DGNR support both inverting and non-inverting configurations?

No - UCC27322DGNR is strictly a non-inverting driver. It belongs to the UCC2732x series, where the "22" suffix denotes non-inverting logic (IN → OUT). The inverting variant is UCC27321DGNR. Both share identical electrical specs, package, and pinout except for internal logic polarity. Attempting to use UCC27322DGNR in an inverting role requires external inversion circuitry and voids guaranteed timing performance.

How should the AGND and PGND pins be connected on the PCB for UCC27322DGNR?

Per TI's layout guidelines, AGND (Pin 4) and PGND (Pin 5) must be joined by a single, wide, low-inductance copper trace directly beneath the UCC27322DGNR package. AGND serves the input/enable circuitry and must connect to the controller's ground; PGND returns the high-current output path and must tie directly to the MOSFET source. Decoupling capacitors (0.1 µF ceramic) must be placed between VDD–AGND and VDD–PGND separately - never shared - to prevent noise coupling from power switching into logic inputs.

Can UCC27322DGNR drive GaN transistors effectively?

Yes - UCC27322DGNR can drive enhancement-mode GaN FETs, particularly those requiring high dV/dt immunity and fast turn-off. Its ±9-A peak current, 20-ns fall time, and low output impedance (0.4–1.0 Ω) provide strong Miller discharge capability critical for GaN gate control. However, due to GaN's lower gate threshold (~1.2–1.8 V), verify that the driver's 1.6–2.5-V VIN_H threshold does not cause marginal switching; adding a small series resistor (5–10 Ω) at the output helps dampen ringing without compromising speed.

What is the purpose of the dual VDD pins (1 and 8) on UCC27322DGNR?

The dual VDD pins (1 and 8) on UCC27322DGNR serve distinct decoupling functions: Pin 1 supplies the AGND-referenced input/enable circuitry and requires a 0.1-µF capacitor to AGND; Pin 8 powers the PGND-referenced output stage and requires a separate 0.1-µF capacitor to PGND. This separation prevents high di/dt transients from the output stage from modulating the input reference voltage - a key design requirement for noise immunity in high-power switching applications. Both pins must be externally shorted to the same VDD rail.