Texas Instruments DRV8812PWPR

Overview

DRV8812PWPR from Texas Instruments is a dual H-bridge stepper motor driver IC designed for bipolar stepper or dual DC motor control in automated equipment. It operates from 8.2 V to 45 V, delivers up to 1.6 A per bridge at 24 V/25°C, supports four-level winding current control (100%/71%/38%/0%), and integrates overcurrent, thermal shutdown, UVLO, and fault reporting via open-drain nFAULT - used in printers, video security cameras, and factory automation.

For engineers reviewing the DRV8812PWPR datasheet, DRV8812PWPR pinout, DRV8812PWPR application, or DRV8812PWPR equivalent, this page provides verified technical context, exact pin functions, decay mode behavior, current regulation design meaning, and validated alternative options for motor control system integration.

Technical Context

The DRV8812PWPR integrates two independent NMOS H-bridge drivers with internal charge pump (CP1/CP2/VCP), fixed-frequency PWM current chopping (50 kHz), and programmable decay modes (slow/mixed/fast) controlled by a single DECAY pin. Each bridge features dedicated current sense inputs (ISENA/ISENB), reference voltage inputs (AVREF/BVREF), and 2-bit DAC-based current scaling (AI0/AI1, BI0/BI1).

It implements blanking time (3.75 µs) to suppress switching noise during current sensing, uses external sense resistors for precision regulation, and provides a built-in 3.3-V regulator (V3P3OUT) with ±2% accuracy at 1 mA load - all within a thermally enhanced HTSSOP-28 PowerPAD™ package rated for –40°C to 85°C ambient operation.

Key Specifications

Pinout & Package

DRV8812PWPR is housed in a 28-pin HTSSOP (PWP) package with exposed PowerPAD™ thermal pad (pin 28/GND). The package measures 9.70 mm × 4.40 mm and requires soldering the PowerPAD to a large PCB copper area for effective heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6600HG and DRV8825, the DRV8812PWPR offers unique value in parallel-interface simplicity, hardware-configurable decay modes, and self-contained 3.3-V bias - making it optimal for cost-sensitive, thermally constrained, and digitally controlled automated equipment where deterministic timing and fault visibility are essential.

Availability

DRV8812PWPR is available at Aetrix Electronics and suitable for printers, video security cameras, and factory automation systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for DRV8812PWPR 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 emphasis on reliability, thermal performance, and industrial-grade qualification.

The DRV8812PWPR belongs to TI's motor driver product line, engineered specifically for cost-effective, thermally robust control of bipolar stepper and dual DC motors in office automation, security, and industrial motion systems.

FAQ

What is the maximum continuous output current capability of the DRV8812PWPR?

The DRV8812PWPR delivers up to 1.6 A per H-bridge continuously at 24 V and 25°C ambient temperature with adequate heatsinking. Current capability decreases with rising junction temperature and supply voltage due to R_DS(on) increase and thermal limits. Derating curves in the datasheet (Figure 3 and Figure 4) must be consulted for operation above 25°C or below 24 V.

How does the DRV8812PWPR implement current regulation for stepper motor windings?

The DRV8812PWPR uses fixed-frequency (50 kHz) PWM current chopping with internal 5 V/V gain amplification of the ISENSE voltage. The trip threshold is set by AVREF/BVREF scaled by AI0/AI1 or BI0/BI1 (100%/71%/38%/0%). When sensed current exceeds VTRIP = xVREF × 0.2, the bridge disables until next PWM cycle - enabling precise full/half/microstepping without external controllers.

What decay modes does the DRV8812PWPR support, and how are they selected?

The DRV8812PWPR supports slow decay, fast decay, and mixed decay - all configured via the single DECAY pin: logic low = slow, open = mixed, logic high = fast. Mixed decay begins with fast decay for 75% of the PWM period, then switches to slow decay - balancing torque retention and power dissipation in mid-speed stepper operation.

Can the DRV8812PWPR operate from a 12-V supply, and what protections remain active?

Yes, the DRV8812PWPR operates down to 8.2 V, so 12 V is fully supported. All protections - overcurrent (OCP), thermal shutdown (TSD), and undervoltage lockout (UVLO at 7.8 V) - remain fully functional. However, R_DS(on) increases at lower VM, raising conduction losses; ensure thermal design accounts for reduced efficiency at 12 V.

What is the function of the V3P3OUT pin on the DRV8812PWPR, and how should it be decoupled?

V3P3OUT is an integrated 3.3-V regulator output capable of sourcing up to 1 mA with ±2% accuracy. It can power external logic or serve as reference for AVREF/BVREF. It must be bypassed with a 0.47-µF ceramic capacitor (6.3-V rating) directly to GND, placed adjacent to the pin - failure to do so risks instability and inaccurate current regulation.