DRV8870DDAR

Overview

The DRV8870DDAR is a single H-bridge motor driver manufactured by Texas Instruments, designed for brushed DC and unipolar stepper motors. It operates within a supply voltage range of 6.5 V to 45 V and delivers a continuous output current of 3.6 A with peak capabilities up to 3.6 A. The device utilizes an NMOS technology architecture housed in an 8-pin SO PowerPAD package. It features integrated current regulation via analog inputs, PWM control interfaces, and comprehensive protection against under-voltage, over-current, and thermal conditions.

Feature Summary

• Integrated current regulation using external sense resistors to limit peak currents and reduce system power requirements
• Dual logic inputs supporting PWM speed control and selectable current decay modes
• Low-power sleep mode activated by setting both inputs to low state
• Comprehensive fault protection including under-voltage lockout, over-current protection, and thermal shutdown

Applications

• Brushed DC motor control systems
• Unipolar stepper motor winding drive
• General-purpose load driving applications
• Industrial automation actuators

Procurement Notes

Verify the specific suffix 'DDAR' corresponds to the tape-and-reel packaging variant rather than the tube-packaged 'DDA'. Confirm RoHS compliance status and REACH SVHC declarations match current regulatory requirements. Ensure moisture sensitivity level (MSL) handling procedures are followed during assembly. Cross-reference the manufacturer part number with distributor codes to avoid ordering errors between similar DRV887x series components.

Selection Notes

Select this component when a single H-bridge configuration is sufficient for bidirectional motor control or single-winding stepper operation. It is suitable for applications requiring integrated current limiting to manage startup and stall currents without large bulk capacitance. Consider the 8-pin SO PowerPAD footprint for space-constrained designs. Evaluate thermal performance based on ambient temperature and PCB copper area, as the junction temperature rating extends to 150°C.

Part Context

The DRV8870 belongs to the DRV887x family of motor drivers from Texas Instruments. It serves as a half-bridge solution, distinct from the full-bridge DRV8871 which supports bipolar stepper motors. The DDAR suffix indicates the active commercial-grade version available in reel packaging. This part complements automotive-grade variants like the DRV8872Q1, offering a cost-effective solution for non-automotive industrial and consumer electronics applications.

Replacement Considerations

The DRV8870DDA is a tube-packaged alternative within the same functional family but is marked as obsolete. For direct pin-compatible replacements, verify the DRV8872DDARQ1 for automotive-grade requirements, noting its slightly different minimum supply voltage. No other direct substitutes are confirmed in the provided documentation.