DRV8870DDA

Overview

The DRV8870DDA is a single H-bridge motor driver manufactured by Texas Instruments, designed for brushed DC and unipolar stepper motor applications. It operates within a supply voltage range of 6.5 V to 45 V and delivers a peak output current of 3.6 A. The device utilizes an NMOS technology with a typical RDS(on) of 565 mΩ (HS+LS). It features integrated current regulation via analog inputs, PWM control interface, and comprehensive protection mechanisms including under-voltage lockout, over-current protection, and thermal shutdown. The component is housed in an 8-pin SO-PowerPad package suitable for surface mount installation.

Feature Summary

• Integrated current regulation capability using external sense resistors to limit peak current and reduce system power requirements.
• Comprehensive fault protection including under-voltage lockout, over-current protection, and thermal shutdown with automatic recovery.
• Low-power sleep mode functionality accessible via logic inputs to minimize standby current consumption.

Applications

• Brushed DC motor control in consumer electronics
• Unipolar stepper motor winding drive
• Valve control systems
• General purpose load driving

Procurement Notes

Verify the specific ordering suffix carefully, as the DRV8870 family includes variants with different packaging or electrical characteristics. Confirm that the DDA suffix corresponds to the tube packaging format required for your assembly process. Cross-reference the manufacturer's latest product change notifications to ensure compliance with current specifications and availability status before finalizing procurement plans.

Selection Notes

Select this component when a single H-bridge topology with integrated current limiting is required for motors operating between 6.5 V and 45 V. Ensure the PCB design accommodates the thermal requirements of the PowerPAD package for sustained operation. Verify that the application logic can support the PWM input interface and that external components for current sensing are compatible with the analog regulation pins.

Part Context

The DRV8870DDA belongs to the DRV8870 series of motor drivers from Texas Instruments. This series is engineered for cost-effective and compact motor control solutions. The DDA variant specifically denotes the tube packaging option within the SO-PowerPad-8 form factor. It shares core functional architecture with other suffixes like DDAR but differs in shipping and handling configurations.

Replacement Considerations

The DRV8870DDAR is a pin-compatible alternative within the same family, offering identical electrical performance but in tape-and-reel packaging. Evaluate based on manufacturing line compatibility and inventory management needs rather than functional differences.