Texas Instruments DRV8803DW

Overview

DRV8803DW from Texas Instruments is a 4-channel protected low-side NMOS driver IC with integrated clamp diodes, 500 mΩ typical R_DS(on), 8.2–60 V operating supply range, and overcurrent/thermal/UVLO protection - used to drive relays, solenoids, and unipolar stepper motors in industrial control and automation systems.

For engineers reviewing the DRV8803DW datasheet, DRV8803DW pinout, DRV8803DW application, or DRV8803DW equivalent, key selection considerations include per-channel current capability (1.5 A single-channel / 800 mA four-channel at 25°C), SOIC-20 thermal design with fused center pins, parallel interface timing (≤800 ns propagation delay), and fault reporting via open-drain nFAULT.

Technical Context

The DRV8803DW implements four independent low-side switching channels, each with an integrated N-channel MOSFET (500 mΩ R_DS(on) at 25°C) and bidirectional clamp diode connected to VCLAMP. It uses analog overcurrent detection with 3.5 µs deglitch and 1.2 ms auto-retry, plus thermal shutdown at ~150°C and UVLO at 8.2 V.

Control is via TTL/CMOS-compatible parallel inputs (IN1–IN4) with internal pulldowns, enabled by active-low nENBL and reset by active-high RESET. The SOIC-20 package features internally fused center pins tied to the die pad for enhanced thermal conduction to PCB copper planes.

Key Specifications

Pinout & Package

DRV8803DW uses a thermally enhanced 20-pin SOIC package (12.80 mm × 10.30 mm body with 12.80 mm × 7.50 mm nominal footprint). Center pins (5, 6, 7, 14, 15, 16) are internally fused to the die pad to improve heat transfer to PCB copper planes - requiring connection to large GND areas or thermal vias for reliable operation at rated current.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TBD7200A and TPIC2603DWR, the DRV8803DW delivers superior thermal robustness via fused-center-pin SOIC, full protection integration (OCP/TSD/UVLO), and VCLAMP flexibility for fast inductive decay - making it optimal for 24–48 V industrial loads where reliability and component count matter.

Availability

DRV8803DW is available at Aetrix Electronics and suitable for relay driver modules, solenoid valve controllers, unipolar stepper motor interfaces, and industrial load switching applications requiring stable component supply and long-term production continuity.

Supply support for DRV8803DW 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 and power management ICs.

The DRV8803DW belongs to TI's precision low-side driver product line, engineered for industrial automation, factory equipment, and motion control systems where robustness, integrated protection, and simplified layout are critical.

FAQ

What is the maximum continuous current per channel for DRV8803DW at 25°C?

The DRV8803DW supports up to 1.5 A per channel when only one output is active, or 800 mA per channel when all four outputs are simultaneously active - both values measured at 25°C ambient on a standard FR-4 PCB with adequate copper pour. This derating reflects thermal limits of the SOIC-20 package, not electrical capability.

How does the VCLAMP pin function in DRV8803DW?

The VCLAMP pin connects the cathodes of all four integrated clamp diodes. It can be tied directly to VM for basic flyback suppression, or connected to a zener/TVS diode referenced to VM to allow output voltage overshoot beyond VM - enabling faster current decay in unipolar stepper motor phase switching. VCLAMP is not a power input and carries no supply current.

Does DRV8803DW require external flyback diodes for inductive loads?

No. The DRV8803DW integrates four bidirectional clamp diodes with a common cathode at VCLAMP, eliminating the need for external flyback diodes in relay, solenoid, and unipolar stepper applications. This reduces BOM count, PCB area, and layout complexity while maintaining robust transient suppression.

What thermal design practices are recommended for DRV8803DW?

For reliable operation, connect all six GND pins (5,6,7,14,15,16) and the fused center leads to a large copper area on the PCB top layer, using multiple thermal vias to a solid bottom-layer ground plane. This leverages the SOIC-20's fused-pin thermal path - reducing R_θJB to 35.4°C/W and enabling full 800 mA four-channel operation at 25°C ambient.

How does the overcurrent protection (OCP) behave in DRV8803DW?

DRV8803DW uses analog current limiting per channel with a 3.5 µs deglitch window. If overcurrent persists beyond that time, the affected channel shuts down and nFAULT goes low. After a fixed 1.2 ms retry period, the channel automatically recovers - or recovers immediately upon RESET assertion or VM power cycle. Trip level is 2.3–3.8 A depending on temperature and process variation.