DRV8817DAP

Overview

The DRV8817DAP is a dual H-bridge motor driver integrated circuit designed for low-voltage applications. It supports bipolar stepper motors and two DC motors with independent PWM control. The device features an integrated charge pump to drive high-side N-channel MOSFETs, enabling efficient operation at supply voltages up to 30 V. It includes built-in current regulation with selectable decay modes (slow, mixed, fast) and provides comprehensive protection mechanisms such as over-current protection, thermal shutdown, and under-voltage lockout.

Feature Summary

• Integrated dual H-bridge architecture supporting both bipolar stepper and dual DC motor configurations
• Built-in charge pump eliminates the need for external bootstrap components for high-side gate driving
• Configurable current chopping with selectable slow, mixed, or fast decay modes for optimized torque performance
• Comprehensive protection suite including over-current detection, thermal shutdown, and under-voltage lockout

Applications

• Home appliances requiring precise motor control
• Industrial automation systems with low-power actuators
• Security systems utilizing stepper motors for positioning
• Office equipment such as printers and scanners

Procurement Notes

Verify the exact suffix 'DAP' corresponds to the specific package type and tape-and-reel quantity required for your assembly line. Confirm that the operating voltage range and current ratings align with your system's power supply capabilities. Ensure proper thermal management solutions are implemented given the power dissipation characteristics of the DAP package. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Selection Notes

Choose this component when a compact solution for driving two DC motors or one bipolar stepper motor is needed within a 30V limit. It is suitable for designs requiring integrated current sensing and protection without external discrete components. Consider the DAP package size constraints and thermal requirements during PCB layout. Evaluate if the fixed frequency current regulation meets your noise sensitivity requirements compared to variable frequency alternatives.

Part Context

The DRV8817 belongs to Texas Instruments' family of motor drivers focused on low-voltage, low-cost applications. It complements higher-power drivers like the DRV8825 by offering a smaller footprint and lower current capacity. This series is commonly used in consumer electronics where space and cost efficiency are critical. The DAP package variant offers a thermally enhanced solution for moderate power densities.

Replacement Considerations

Direct replacements may include other TI dual H-bridge drivers such as the DRV8834 or DRV8838, depending on voltage and current requirements. Verify pin-to-pin compatibility and electrical specifications before substitution. Alternative manufacturers may offer similar functionality but require careful evaluation of interface signals and protection features.