Texas Instruments DRV8412DDWR

Overview

DRV8412DDWR from Texas Instruments is a dual full-bridge PWM motor driver IC designed for high-efficiency brushed DC and stepper motor control. It delivers up to 2 × 3A continuous output current (2 × 6A peak) in dual full-bridge mode, features 110mΩ R_DS(on) MOSFETs at T_J = 25°C, supports up to 52V supply voltage, and operates at PWM frequencies up to 500kHz - enabling precise, energy-efficient actuation in compact robotic and haptic systems.

For engineers reviewing the DRV8412DDWR datasheet, DRV8412DDWR pinout, DRV8412DDWR application, or DRV8412DDWR equivalent, key selection considerations include its HTSSOP-44 package with exposed thermal pad, programmable cycle-by-cycle current limit via OC_ADJ, independent PVDD/GVDD supplies per half-bridge, integrated overtemperature/overcurrent/undervoltage protection, and four configurable half-bridges supporting parallel or dual full-bridge topologies.

Technical Context

The DRV8412DDWR implements four independently controlled half-bridges (A–D), each with dedicated PVDD_X, GVDD_X, GND_X, and BST_X pins - enabling isolated power domains and shunt-based current sensing per bridge. Its intelligent gate drive includes cross-conduction prevention, dead-time control (5.5ns), and bootstrap capacitor undervoltage protection that triggers automatic recharge sequences below ~10kHz switching.

Protection architecture features two-stage thermal response (OTW at 125°C nominal, OTSD at 150°C), fast overcurrent detection (250ns response), and latching fault shutdown with active-low open-drain FAULT/OTW outputs. Mode selection via M1–M3 pins configures operation between dual full-bridge, four half-bridge, or parallel full-bridge modes - all with cycle-by-cycle current limiting unless explicitly set to latching shutdown.

Key Specifications

Pinout & Package

DRV8412DDWR uses the HTSSOP-44 (DDW) package: 14.0 mm × 8.1 mm body with 0.65 mm pitch, featuring an exposed thermal pad on the bottom surface that must be soldered to PCB ground for thermal integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual full-bridge motor driver applications.

Compared with DRV8412DDWR, DRV8432DKDR offers +133% continuous current capacity but requires PCB redesign due to incompatible pinout and thermal slug orientation; TB9051FTG provides functional safety features and integrated sensing at the cost of reduced voltage headroom and loss of per-bridge power domain isolation.

Availability

DRV8412DDWR is available at Aetrix Electronics and suitable for robotic joint actuation, haptic feedback modules, and industrial pump control requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for DRV8412DDWR 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 and embedded processing technologies, with decades of expertise in motor control ICs and high-reliability power solutions.

The DRV84x2 product line was engineered specifically for high-efficiency, multi-bridge motor control in space-constrained industrial and robotics applications - emphasizing thermal robustness, flexible topology configuration, and integrated protection without external components.

FAQ

What is the maximum continuous output current supported by the DRV8412DDWR in dual full-bridge mode?

The DRV8412DDWR supports up to 2 × 3A continuous output current (6A total) in dual full-bridge mode at T_A = 85°C with proper PCB thermal design. This rating assumes the HTSSOP-44 package's exposed thermal pad is fully soldered to a 6-layer PCB with ≥4 thermal vias to inner ground planes. Peak current capability reaches 2 × 6A for short durations, limited by internal overcurrent protection and thermal derating above 70°C ambient.

How does the OC_ADJ pin function in the DRV8412DDWR, and what resistor value sets a 9.7A current limit?

The OC_ADJ pin on the DRV8412DDWR accepts an external resistor to AGND to program the overcurrent threshold. A 27kΩ resistor sets a typical 9.7A current limit in cycle-by-cycle mode, as specified in Table 6-2 of the datasheet. The relationship is inverse: lower resistance increases trip current. Note that device-to-device variation of ±20% means system-level calibration or margining is required for critical applications - the DRV8412DDWR uses this for protection, not precision current regulation.

Can the DRV8412DDWR operate without external bootstrap capacitors, and what is their required range?

No, the DRV8412DDWR cannot operate without external bootstrap capacitors on BST_A–BST_D pins. Each requires a 33–220nF ceramic capacitor (X7R, 16V rating) connected between BST_X and OUT_X. Capacitor selection depends on PWM frequency: 33nF suffices for 500kHz operation, while ≥100nF is recommended below 100kHz to maintain gate drive voltage during extended low-side conduction. Using >220nF requires adding 5Ω series resistors from GVDD to GVDD_X pins to limit inrush current.

What thermal management requirements apply to the DRV8412DDWR's exposed power pad?

Thermal performance of the DRV8412DDWR critically depends on soldering the exposed thermal pad (pin 45) to a large copper pour connected to PCB ground via ≥4 thermal vias (0.3mm diameter, spaced ≤2mm apart). Without this, R_θJA degrades from 24.5°C/W to >40°C/W, risking thermal shutdown above 2W dissipation. TI's EVM uses 34mm² pad area; minimum recommended landing pad is 25mm² with 0.5oz copper on inner layers.

How does the DRV8412DDWR handle overtemperature conditions, and what is the difference between OTW and FAULT signals?

The DRV8412DDWR implements two-stage thermal protection: OTW asserts low at 125°C (nominal) as a warning to reduce load current; FAULT asserts low only upon overtemperature shutdown at 150°C (OTSD), which latches until RESET_AB/CD is pulsed. OTW is non-latching and self-clears when junction cools below 100°C (25°C hysteresis); FAULT remains active until reset - ensuring system firmware acknowledges critical thermal events before resuming operation.