Texas Instruments DRV8886RHRR

Overview

DRV8886RHRR from Texas Instruments is a 24-pin WQFN-packaged PWM microstepping stepper motor driver IC with integrated current sensing, 8–37 V operation, 2-A full-scale output per bridge, and 1/16 microstepping capability - used in precision motion control for 3D printers, office automation, and video security cameras.

For engineers reviewing the DRV8886RHRR datasheet, DRV8886RHRR pinout, DRV8886RHRR application, or DRV8886RHRR equivalent, this page delivers verified electrical specs, STEP/DIR interface timing, decay-mode configuration, thermal performance (RθJA = 33.2°C/W), and real-world protection behavior including VM UVLO, OCP, and open-drain nFAULT reporting.

Technical Context

The DRV8886RHRR implements a fixed off-time PWM current regulation architecture with selectable slow/mixed decay modes, adaptive blanking time scaling versus output current, and tri-level M0/M1 microstepping mode control supporting full-, 1/2-, 1/4-, 1/8-, and 1/16-step plus non-circular 1/2-step. Its internal current-sense architecture eliminates external sense resistors using MOSFET R_DS(ON) mirroring with ±6.25% full-scale accuracy.

It integrates dual N-channel H-bridges (550 mΩ total HS+LS R_DS(ON) at 24 V/25°C), charge pump (VCP/CPL/CPH), dual LDOs (AVDD/DVDD), and fault management logic with dedicated nFAULT open-drain output. Sleep mode draws only 20 µA at 25°C, and wake-up time is 0.85–1.5 ms.

Key Specifications

Pinout & Package

DRV8886RHRR uses a 28-pin WQFN package (5.50 mm × 3.5 mm) with exposed thermal pad for enhanced heat dissipation. Pin functions are validated per TI SLVSDA4C datasheet Rev. March 2020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar stepper motor driver applications.

Compared with DRV8886RHRR, the DRV8886NPRHR trades torque DAC and compact WQFN for lower cost and simpler layout, while the STSPIN820TR adds configurability at the expense of external sensing and larger solution size.

Availability

DRV8886RHRR is available at Aetrix Electronics and suitable for 3D printer motion control, video security camera pan/tilt systems, and ATM cash handling mechanisms requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DRV8886RHRR 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 delivering analog, embedded processing, and connectivity solutions with focus on reliability, efficiency, and design enablement.

The DRV8886 product line targets industrial and consumer motion control applications, integrating microstepping, current regulation, and protection into single-chip stepper drivers for compact, low-BOM-cost systems.

FAQ

What is the maximum step frequency supported by the DRV8886RHRR?

The DRV8886RHRR accepts STEP inputs up to 100 kHz under recommended operating conditions. While the STEP pin itself can handle pulses up to 500 kHz, system bandwidth is limited by motor inductance and load inertia - actual achievable step rate depends on winding resistance, supply voltage, and microstep resolution. For 1/16-step operation driving a 42mm NEMA-17 motor at 24 V, typical sustained rates are 15–25 kHz.

How does the DRV8886RHRR achieve current sensing without external resistors?

The DRV8886RHRR uses an internal current-mirror architecture that leverages the R_DS(ON) of its integrated N-channel power MOSFETs to sense phase current. This eliminates the need for two external high-power shunt resistors, reducing PCB area, BOM cost, and power loss. Full-scale accuracy is ±6.25%, calibrated across temperature and supply voltage per TI SLVSDA4C datasheet Section 6.5.

What decay modes does the DRV8886RHRR support, and how are they selected?

The DRV8886RHRR supports slow decay, mixed decay, and slow-mixed decay modes, selected via the quad-level DECAY pin using resistor dividers to set four distinct voltage thresholds (0–0.14 V, 0.24–0.46 V, 0.71–1.24 V, 2.12–5.3 V). Slow-mixed decay applies slow decay on increasing current steps and mixed decay on decreasing steps - optimizing torque and reducing audible noise in mid-speed operation.

Can the DRV8886RHRR drive unipolar stepper motors?

No, the DRV8886RHRR is designed exclusively for bipolar stepper motors. Its dual full H-bridge topology drives both windings bidirectionally, which is incompatible with unipolar motor wiring (center-tapped coils). Attempting to connect a unipolar motor may result in improper commutation, excessive heating, or device fault activation due to incorrect current paths.

What thermal derating applies to the DRV8886RHRR's 2-A full-scale rating?

The 2-A full-scale rating assumes TA = 25°C, VM = 24 V, and adequate PCB copper area (≥4 cm² 2-oz thermal pad). At 125°C ambient, full-scale current must be reduced to ~1.2 A to maintain junction temperature ≤150°C - calculated using RθJA = 33.2°C/W and power dissipation from R_DS(ON) and switching losses. Derating curves are provided in Figure 11 of the DRV8886RHRR datasheet.