Texas Instruments DRV8814PWPR

Overview

DRV8814PWPR from Texas Instruments is a dual H-bridge DC motor driver IC designed for precise current-controlled driving of two brushed DC motors in automated equipment. It operates from 8 V to 45 V, delivers up to 2.5 A peak output per bridge at 24 V/25°C, supports four-level winding current control (0%, 38%, 71%, 100%), and integrates overcurrent, thermal shutdown, and UVLO protection. It is used in printers and office automation machines where compact, fault-aware motor control is required.

For engineers reviewing the DRV8814PWPR datasheet, DRV8814PWPR pinout, DRV8814PWPR application, or DRV8814PWPR equivalent, this page provides verified technical context, validated pin functions, confirmed decay-mode behavior, real-world current regulation parameters, and OEM-ready supply support - all specific to the HTSSOP-28 PowerPAD™ package.

Technical Context

The DRV8814PWPR implements two independent NMOS H-bridge drivers with integrated current-sense amplifiers (5 V/V gain), fixed-frequency PWM current regulation (50 kHz), and programmable decay mode (slow/fast) controlled by a single DECAY input. Each bridge uses external sense resistors and dual 2-bit DAC inputs (AI1/AI0, BI1/BI0) to set four discrete current levels relative to AVREF/BVREF reference voltage.

Protection is hardware-based and autonomous: analog overcurrent detection (3 A trip level) operates independently of the current-sense path; thermal shutdown triggers at 150–180°C die temperature; undervoltage lockout activates below 7.8 V on VM. The device includes a built-in 3.3-V regulator (V3P3OUT) with ±1 mA load capability and 3.2–3.4 V output tolerance.

Key Specifications

Pinout & Package

DRV8814PWPR is housed in a 28-pin HTSSOP package (9.70 mm × 4.40 mm) with exposed PowerPAD™ thermal pad for enhanced heat dissipation. The package is RoHS-compliant and Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6612FNG, DRV8814PWPR delivers 108% higher peak current and eliminates an external LDO; versus DRV8876PWPR, it trades SPI configurability for simpler parallel control and built-in 3.3-V supply - making it optimal for cost-sensitive, space-constrained industrial motion control.

Availability

DRV8814PWPR is available at Aetrix Electronics and suitable for printers, scanners, and office automation machines requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for DRV8814PWPR 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 expertise in motor control ICs.

The DRV8814PWPR belongs to TI's precision motor driver product line, engineered specifically for cost-effective, thermally robust control of dual brushed DC motors in mid-power industrial and office equipment.

FAQ

What is the maximum continuous motor current supported by the DRV8814PWPR?

The DRV8814PWPR supports up to 2.5 A peak output current per H-bridge at 24 V and 25°C ambient temperature with adequate heatsinking. Continuous RMS current is rated at 1.75 A under the same conditions. Actual sustained current depends on PCB thermal design - RθJA is 31.6 °C/W, so board layout with PowerPAD™ thermal vias and copper pour is essential to maintain safe junction temperature.

Does the DRV8814PWPR require external components for basic operation?

Yes, the DRV8814PWPR requires several external components for reliable operation: two 0.1-μF ceramic capacitors on VMA and VMB pins, a 0.47-μF capacitor on V3P3OUT, a 0.01-μF flying capacitor between CP1/CP2, and current sense resistors (e.g., 200 mΩ) connected to ISENA/ISENB. These are mandatory for gate drive stability, regulation, and current sensing - no internal compensation eliminates need for them.

How does the DECAY pin affect motor behavior when the ENBL signal is inactive?

When AENBL or BENBL is driven low, the DECAY pin determines whether the motor brakes or coasts: if DECAY = low, both low-side FETs turn on (slow decay), shorting the motor terminals to rapidly dissipate kinetic energy; if DECAY = high, the bridge enters fast decay mode, reversing polarity briefly to bring current to zero before disabling - enabling controlled coast-to-stop motion. This behavior applies identically to both bridges.

Can the DRV8814PWPR drive stepper motors?

The DRV8814PWPR is not designed for stepper motor control. It lacks microstepping logic, step/direction interfaces, and phase sequencing circuitry. While it can energize two windings independently, it cannot coordinate bipolar full-step or half-step sequences. For stepper applications, TI recommends dedicated drivers like the DRV8825 or DRV8880. The DRV8814PWPR is optimized exclusively for brushed DC motor control.

What protection features are implemented in hardware without software intervention?

The DRV8814PWPR implements three hardware-based protections: overcurrent protection (OCP) trips at 3 A per FET and disables outputs within microseconds; thermal shutdown (TSD) activates at 150–180°C die temperature and auto-recovers when cooled; undervoltage lockout (UVLO) disables all circuitry below 7.8 V on VM and resumes operation once voltage rises above threshold. All assert the open-drain nFAULT pin - no firmware or configuration required.