Texas Instruments DRV8323RSRGZT

Overview

DRV8323RSRGZT from Texas Instruments is a 6–60-V three-phase smart gate driver IC for driving high-side and low-side N-channel MOSFETs in BLDC and PMSM motor control systems. It integrates triple low-side current sense amplifiers (5–40 V/V gain), a 600-mA integrated buck regulator, and supports SPI interface with 6x/3x/1x PWM modes. It delivers 1-A peak source / 2-A peak sink gate drive current and operates down to 12 µA sleep current.

For engineers reviewing the DRV8323RSRGZT datasheet, DRV8323RSRGZT pinout, DRV8323RSRGZT application, or DRV8323RSRGZT equivalent, key selection criteria include integrated current sensing capability, buck regulator presence, SPI configurability, thermal fault reporting via nFAULT, and compatibility with 1.8-/3.3-/5-V logic interfaces in compact motor drive designs.

Technical Context

The DRV8323RSRGZT implements a Smart Gate Drive architecture with independently adjustable slew rate, programmable gate drive strength (via IDRIVE pin), and configurable PWM input modes (6x, 3x, 1x, independent). Its integrated charge pump enables 100% duty-cycle operation for high-side NMOS drivers, while the linear LDO supplies 3.3 V / 30 mA for external logic.

It embeds three bidirectional low-side current sense amplifiers with selectable gain (5/10/20/40 V/V) and auto-offset calibration (CAL pin), plus an LMR16006X-based 4–60-V input, 0.8–60-V output, 600-mA buck regulator. Fault detection includes VM UVLO, CPUV, MOSFET OCP, GDF, OTW/OTSD, and VDS monitoring - all reported via nFAULT and SPI registers.

Key Specifications

Pinout & Package

VQFN-48 package (7.0 mm × 7.0 mm, 0.4-mm pitch) with exposed thermal pad - optimized for thermal dissipation in high-current motor drive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar three-phase gate driver applications.

Compared with DRV8323SRGZT, the DRV8323RSRGZT provides full SPI configurability and diagnostic visibility at minor cost premium; versus DRV8353RSRTVT, it trades dedicated VDS comparators for integrated buck regulation - making it optimal for space-constrained, multi-rail e-mobility systems.

Availability

DRV8323RSRGZT is available at Aetrix Electronics and suitable for brushless-DC motor modules, e-bike powertrains, and cordless power tools requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for DRV8323RSRGZT 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 decades of leadership in motor control ICs and industrial-grade reliability.

The DRV8323RSRGZT belongs to TI's DRV832x smart gate driver family, designed specifically for high-efficiency, compact, and feature-rich three-phase motor drives in consumer, industrial, and e-mobility applications.

FAQ

What is the maximum operating voltage for the DRV8323RSRGZT gate driver stage?

The DRV8323RSRGZT gate driver operates from 6 V to 60 V on the VM supply pin. This range supports common battery architectures including 12 V, 24 V, 36 V, 48 V, and 60 V nominal systems. The absolute maximum rating for VM is 65 V, but continuous operation above 60 V is not recommended per datasheet specifications. The integrated buck regulator accepts 4–60 V input, decoupled separately via VIN and BGND pins.

Does the DRV8323RSRGZT support bidirectional current sensing?

Yes, the DRV8323RSRGZT supports bidirectional current sensing through its three integrated low-side current sense amplifiers (CSAs). Each CSA accepts differential inputs from shunt resistors placed on the low-side legs and provides rail-to-rail output swing. Gain is selectable via the GAIN pin (5/10/20/40 V/V), and auto-offset calibration is triggered by asserting the CAL pin high - enabling accurate zero-current baseline correction for torque reversal in BLDC and PMSM applications.

How does the nFAULT pin behave during a fault condition on the DRV8323RSRGZT?

The nFAULT pin on the DRV8323RSRGZT is an open-drain output that pulls low during any active fault condition - including VM undervoltage lockout, charge pump undervoltage, MOSFET overcurrent, gate driver fault, thermal warning/shutdown, or VDS overvoltage. The pin remains asserted until the fault is cleared either by cycling ENABLE or issuing a reset pulse (8–40 µs low pulse). Full fault identification is available via SPI register reads (e.g., FAULT_STATUS register at address 0x0A).

Can the DRV8323RSRGZT operate without an external microcontroller?

Yes, the DRV8323RSRGZT supports standalone operation using hardware control mode (H/W interface). In this mode, PWM signals applied to INHA–INHC and INLA–INLC pins directly control gate outputs in 6x, 3x, or 1x configurations selected by the MODE pin. SPI is optional - used only for configuration, diagnostics, and advanced features like gain setting or fault register access. All core gate driving functions remain fully operational without firmware intervention.

What thermal management provisions does the DRV8323RSRGZT include?

The DRV8323RSRGZT includes thermal warning (OTW) and thermal shutdown (OTSD) protection with hysteresis. When die temperature exceeds 150°C, OTW asserts and sets a flag in the SPI FAULT_STATUS register; if temperature rises further to 175°C, OTSD triggers and forces all gate outputs low. Recovery requires either ENABLE toggle or reset pulse. The VQFN-48 package features an exposed thermal pad that must be soldered to a large copper pour for effective heat dissipation - TI recommends ≥200 mm² of 2-oz copper connected to PGND/AGND planes.