Texas Instruments DRV8881PRHRT

Overview

DRV8881PRHRT from Texas Instruments is a 28-pin WQFN-packaged dual H-bridge motor driver IC for bipolar stepper and brushed-DC motors, operating from 6.5 V to 45 V, delivering up to 2.5-A peak current per bridge with PWM control interface, adaptive blanking time, and configurable 10/20/30-µs off-time - used in video security cameras and multi-function printers.

For engineers reviewing the DRV8881PRHRT datasheet, DRV8881PRHRT pinout, DRV8881PRHRT application, or DRV8881PRHRT equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal performance (RθJB = 8.0°C/W), real-world decay mode behavior, and precise alternative part comparisons - all grounded in TI's SLVSD19A production data sheet.

Technical Context

The DRV8881PRHRT implements two independent N-channel MOSFET H-bridges with integrated current regulation via fixed-off-time PWM chopping. It uses tri-level TOFF, ADECAY, and BDECAY pins to select 10/20/30-µs off-time and slow/mixed/fast decay modes - no Smart Tune (exclusive to DRV8881E). Parallel mode (enabled via PARA pin) allows combined output for 2.8-A rms drive capability.

Current scaling is achieved through torque DAC inputs TRQ0/TRQ1 (25%/50%/75%/100%) and analog AVREF/BVREF inputs (0.3–3.3 V), with sense amplifier attenuation of 6.09–6.94 V/V depending on torque setting. Protection includes VM UVLO (6.1–6.5 V), charge pump UVLO, overcurrent trip at 2.5 A, and thermal shutdown at 150°C with 35°C hysteresis.

Key Specifications

Pinout & Package

DRV8881PRHRT is housed in a 28-pin WQFN (5.50 mm × 3.50 mm) with exposed thermal pad (GND-connected). Pin numbering follows TI's RHR package top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DRV8881PRHRT, DRV8880PWPR offers identical electrical performance in a thermally less efficient but more manufacturable HTSSOP package, while MP6532GQ-Z trades peak current, decay flexibility, and torque scaling for smaller size and lower gate count - making DRV8881PRHRT optimal for thermally constrained, high-dynamic-response industrial stepper designs.

Availability

DRV8881PRHRT is available at Aetrix Electronics and suitable for video security cameras, multi-function printers, and factory automation systems requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.

Supply support for DRV8881PRHRT 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 industrial-grade power management solutions.

DRV8881PRHRT belongs to TI's precision motor driver product line, engineered for robust bipolar stepper and dual brushed-DC control in harsh environments - emphasizing thermal resilience, fault visibility, and flexible current regulation for motion-critical industrial equipment.

FAQ

What is the maximum continuous RMS current per bridge for DRV8881PRHRT?

The DRV8881PRHRT delivers 1.4-A rms current per H-bridge under recommended conditions (TA = 25°C, 24-V supply, adequate PCB ground plane). In parallel mode, it achieves 2.8-A rms by combining both bridges - verified in TI's SLVSD19A datasheet Section 7.3.1.2 and Thermal Information Table 6.4.

Does DRV8881PRHRT support Smart Tune decay optimization?

No, DRV8881PRHRT does not support Smart Tune. That feature is exclusive to the DRV8881E variant (PH/EN interface). The DRV8881PRHRT uses fixed decay mode selection via ADECAY/BDECAY pins - slow, mixed, or fast - as confirmed in the Functional Block Diagram (Figure 12) and Feature Description Section 7.3.3 of the datasheet.

What package type and thermal characteristics define DRV8881PRHRT?

DRV8881PRHRT uses a 28-pin WQFN package (5.50 mm × 3.50 mm) with exposed thermal pad. Its key thermal metric is RθJB = 8.0°C/W, indicating highly efficient junction-to-board heat transfer - critical for conduction-cooled layouts. This value is documented in Table 6.4 of the SLVSD19A datasheet and enables higher power density than the HTSSOP variant.

How is current regulation configured on DRV8881PRHRT?

DRV8881PRHRT uses fixed-off-time PWM current regulation set by TOFF (10/20/30 µs), AVREF/BVREF analog reference inputs (0.3–3.3 V), and TRQ0/TRQ1 digital torque scaling (25–100%). The sense amplifier attenuates AISEN/BISEN signals at 6.09–6.94 V/V depending on TRQ setting - all specified in Electrical Characteristics Table 6.5 and Feature Description Section 7.3.4.

What protection features are integrated into DRV8881PRHRT?

DRV8881PRHRT integrates VM undervoltage lockout (6.1–6.5 V), charge pump UVLO, overcurrent protection (2.5-A trip), automatic OCP retry (0.5–2 ms), thermal shutdown (150°C), and fault indication via open-drain nFAULT pin. These are fully detailed in Section 6.5 Protection Circuits and Figure 12's block diagram - ensuring safe operation across industrial temperature and supply ranges.