Texas Instruments DRV8806PWPR

Overview

DRV8806PWPR from Texas Instruments is a quad-channel protected low-side NMOS driver IC with serial interface control, 500 mΩ typical R_DS(ON) per channel at 25°C, 1-A continuous output per channel (all channels active), and integrated clamp diodes for inductive load transient suppression. It drives unipolar stepper motors, solenoids, and relays in industrial automation and motion control systems.

For engineers reviewing the DRV8806PWPR datasheet, DRV8806PWPR pinout, DRV8806PWPR application, or DRV8806PWPR equivalent, this page delivers verified electrical specifications, fault-handling behavior, thermal limits, daisy-chain serial interface timing, and real-world design constraints for motor drive PCB layout and power supply decoupling.

Technical Context

The DRV8806PWPR implements four independent low-side N-channel MOSFET drivers with analog overcurrent protection (3–5 A trip level) and open-load detection (25 µA current source per output). Each channel features internal clamp diodes tied to the VCLAMP pin, configurable to VM or a Zener/TVS for fast inductive decay.

It uses a synchronous serial interface with SCLK, SDATIN, SDATOUT (push-pull), LATCH, RESET, and nENBL control signals. Fault status (OCP, open-load, overtemperature) is latched into a shift register and readable via SDATOUT on falling SCLK edges after LATCH high-to-low transition.

Key Specifications

Pinout & Package

DRV8806PWPR is housed in a thermally enhanced 16-pin HTSSOP package (5.00 mm × 4.40 mm body size) with exposed PowerPAD™ for PCB thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side driver applications.

Compared with TB6612FNG and TPIC2101, the DRV8806PWPR uniquely combines quad low-side drive, serial configurability, integrated clamp diodes, and per-channel diagnostic readback - enabling compact, intelligent, and serviceable motor interface modules where board space and fault visibility are critical.

Availability

DRV8806PWPR is available at Aetrix Electronics and suitable for industrial automation, motion control, and programmable load applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DRV8806PWPR 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 broad industrial and automotive focus.

The DRV8806PWPR belongs to TI's motor driver product line, engineered specifically for compact, intelligent low-side switching of inductive loads in space-constrained industrial systems where serial control, fault diagnostics, and thermal robustness are essential.

FAQ

What is the maximum continuous output current per channel for the DRV8806PWPR?

The DRV8806PWPR supports 1 A continuous output current per channel when all four channels are active at 25°C with adequate PCB heatsinking. With only one channel active, it delivers up to 2 A. This rating assumes proper thermal design - including connection of the PowerPAD™ to a large copper area and use of recommended decoupling capacitors on the VM rail. Exceeding these conditions risks triggering thermal shutdown.

How does the DRV8806PWPR handle overcurrent events?

The DRV8806PWPR uses an analog current limit circuit per channel that disables the FET gate drive if current exceeds 3–5 A for longer than 3.5 µs. The affected channel remains off for 1.2 ms (auto-retry interval), after which it resumes operation unless the fault persists. The nFAULT pin goes low and the fault status is latched into the serial shift register for readback - enabling precise root-cause identification without interrupting other channels.

Can multiple DRV8806PWPR devices be controlled using a single microcontroller SPI interface?

Yes - the DRV8806PWPR supports daisy-chain configuration via its SDATIN and SDATOUT pins. Data written to the first device's SDATIN propagates through SDATOUT to the next device's SDATIN on each SCLK rising edge. A single LATCH pulse updates all devices simultaneously. This eliminates the need for individual chip-select lines and reduces MCU pin count, making it ideal for multi-axis motion controllers or modular I/O systems.

What is the purpose of the VCLAMP pin on the DRV8806PWPR?

The VCLAMP pin connects the anodes of all four integrated clamp diodes. It can be tied directly to VM to clamp inductive kickback to the supply rail, or connected to a Zener/TVS diode referenced to VM to allow clamping above VM - enabling faster current decay in unipolar stepper windings. This flexibility improves torque response and reduces heat generation compared to external diode solutions, while eliminating four discrete components.

Does the DRV8806PWPR provide open-load detection, and how is it implemented?

Yes - the DRV8806PWPR implements per-channel open-load detection using a 25 µA internal current source on each OUTx pin. When the output is off, the device monitors the pin voltage; if it falls below 1.2 V within 15 µs (deglitch time), an OPEN_FAULT latch is set. This status is reported via the serial interface and reflected on the nFAULT pin. No external components are needed, and detection works reliably across typical solenoid and relay coil impedances.