DRV8821DCAR

Overview

The DRV8821DCAR is a dual bipolar stepper motor driver manufactured by Texas Instruments, designed for surface-mount installation in an HTSSOP-48 package. It operates within a supply voltage range of 8 V to 32 V and supports a maximum output current of 1.5 A per bridge. The device features a typical switching frequency of 50 kHz and handles a converter rated power of 5.61 W. It functions across an operating temperature range from -40 °C to +85 °C, with physical dimensions of 12.6 mm in length, 6.2 mm in width, and 1.05 mm in height.

Feature Summary

• Integrated dual H-bridge architecture specifically configured for driving bipolar stepper motors
• Supports multiple microstepping resolutions including full, half, quarter, eighth, sixteenth, and thirty-second step modes
• Incorporates adjustable current control circuitry to manage motor torque and thermal performance

Applications

• Office automation equipment such as printers and scanners
• Security systems including CCTV camera pan-tilt mechanisms
• Automated vending machines and retail kiosks
• Industrial automation modules requiring precise motion control

Procurement Notes

Verify the specific suffix 'R' indicates reel packaging when ordering. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the HTSSOP-48 pinout matches the target PCB layout design. Validate that the 32 V maximum rating aligns with the system's power supply specifications to prevent component damage during operation.

Selection Notes

Select this component for applications requiring compact dual-axis stepper control without external discrete drivers. Consider the 1.5 A current limit when sizing heat dissipation solutions for continuous duty cycles. Evaluate the 50 kHz switching frequency against electromagnetic interference requirements in sensitive environments. Compare thermal resistance characteristics against available board space for adequate heat spreading.

Part Context

This part belongs to the DRV882x family of stepper motor drivers from Texas Instruments. It shares architectural similarities with other devices in the series but is distinguished by its dual-channel configuration and specific current handling capabilities. The HTSSOP-48 package provides a balance between pin count and footprint size for dense electronic assemblies.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify pin-to-pin compatibility and electrical parameter alignment before replacing.