DRV8251ADDAR

Overview

The DRV8251ADDAR is a brushed DC motor driver featuring an N-channel H-bridge, charge pump, and integrated current sensing. It operates within a supply voltage range of 4.5V to 48V and delivers a peak output current of 4.1A. The device utilizes an internal IPROPI current mirror architecture for detection and regulation, eliminating the need for external shunt resistors. It supports PWM control with logic inputs compatible with 1.8V, 3.3V, and 5V systems. Protection features include undervoltage lockout, overcurrent protection, and thermal shutdown.

Feature Summary

• Integrates an N-channel H-bridge with a charge pump to support 100% duty cycle driving and high efficiency.
• Features an internal IPROPI current mirror architecture that enables current detection and regulation without external shunt resistors.
• Includes comprehensive protection mechanisms such as UVLO, automatic recovery overcurrent protection, and thermal shutdown.

Applications

• Brushed DC motor control in home appliances
• Industrial automation and motion control systems
• Automotive interior applications requiring low static current

Procurement Notes

Verify the specific suffix ADDAR against official Texas Instruments documentation to confirm the package type and tape-and-reel configuration. Ensure compatibility with system voltage requirements ranging from 4.5V to 48V. Confirm that the 4.1A peak current capability aligns with the intended motor load specifications before finalizing procurement.

Selection Notes

Select this component when designing systems requiring integrated current sensing without external shunt resistors to reduce board space. It is suitable for applications needing low quiescent current in sleep mode, specifically below 1µA at 24V. Consider the 8-pin HSOP package dimensions if PCB real estate is constrained.

Part Context

This part belongs to the DRV8251A family of motor drivers from Texas Instruments. It is designed as a cost-effective solution for single brushed DC motors, offering pin-to-pin compatibility options with other devices in the series while providing distinct current sensing capabilities through its internal mirror architecture.

Replacement Considerations

Official pin-compatible alternatives within the same family include the DRV8251 and DRV8231 variants. Verify specific Rds(on) values and current sensing methods (shunt vs. mirror) when substituting to ensure functional equivalence in the target application.

FAQ

How does the DRV8251ADDAR handle current sensing?

It uses an internal IPROPI current mirror architecture on the IPROPI pin to provide current detection and regulation feedback, removing the need for large power shunt resistors.

What logic levels are supported by the PWM interface?

The device supports PWM control interfaces compatible with 1.8V, 3.3V, and 5V logic input voltages.