DRV8311PRRWR

Overview

The DRV8311PRRWR is a three-phase PWM motor driver from Texas Instruments, designed for brushless DC motors. It operates within a supply voltage range of 3 V to 20 V, with an absolute maximum rating of 24 V. The device delivers a peak output current of 5 A and features low on-state resistance MOSFETs with a typical RDS(ON) of 210 mΩ at 25°C. It supports PWM frequencies up to 200 kHz via its tSPI interface and includes integrated current sensing amplifiers. The component functions in temperatures from -40°C to +125°C and is housed in a WQFN-24 package.

Feature Summary

• Integrates three half-bridge MOSFETs with built-in charge pump and linear regulator for compact system design
• Features tSPI interface allowing PWM generation, duty cycle updates, and multi-device control without external timers
• Includes integrated current sense amplifiers for each half-bridge, eliminating the need for external shunt resistors
• Provides comprehensive protection mechanisms including over-current, thermal warning, and under-voltage lockout

Applications

• Three-phase brushless DC motor drives in consumer appliances
• Battery-powered systems utilizing 1S to 4S battery configurations
• Industrial automation equipment requiring precise motor control
• Automotive subsystems compatible with automotive grade specifications

Procurement Notes

Verify the specific suffix PRRWR against the manufacturer's latest datasheet to confirm tape-and-reel packaging and quantity. Ensure the ordering part number matches the required automotive qualification (Q1) if applicable. Cross-reference the pinout and electrical characteristics with official TI documentation before integration to avoid compatibility issues with existing PCB layouts.

Selection Notes

Select this variant when SPI-based PWM generation is preferred over direct hardware PWM inputs to reduce microcontroller I/O usage. The DRV8311P series is suitable for applications requiring integrated current sensing and simplified control logic. Consider the WQFN-24 package constraints for thermal management and board space. Verify that the system voltage remains within the 3 V to 20 V operating range for reliable performance.

Part Context

This component belongs to the DRV8311-Q1 family of three-phase motor drivers from Texas Instruments. The family includes variants such as DRV8311H, DRV8311S, and DRV8311P, which differ primarily in their control interfaces. The 'P' designation indicates support for the tSPI interface, enabling advanced configuration and PWM generation capabilities compared to standard hardware-controlled versions.

Replacement Considerations

Direct substitutes within the same family include DRV8311HRRWR and DRV8311SRRWR, though these lack the tSPI interface. For functional equivalence with different control schemes, verify compatibility with DRV8311 variants. Check for newer revisions or automotive-grade equivalents like DRV8311PQRRWRQ1 if enhanced reliability data is required.