LMD18245T/NOPB

Overview

The LMD18245T/NOPB is a monolithic full-bridge motor driver manufactured by Texas Instruments, designed for driving bipolar stepper motors and DC loads. It integrates high-voltage DMOS technology to deliver a continuous output current of 3A with a maximum supply voltage capability of 55V. The device operates within an extended temperature range from -40°C to +125°C and utilizes a TO-220-11 through-hole package. Key electrical specifications include a minimum operating supply voltage of 12V and a typical quiescent supply current of 13mA. The component supports PWM control frequencies up to 100kHz.

Feature Summary

• Integrates high-voltage DMOS full-bridge architecture for robust motor control
• Provides thermal shutdown protection to prevent damage during overload conditions
• Supports direct interface with standard logic families including TTL and CMOS
• Enables bidirectional control and braking functions for stepper and DC motors

Applications

• Bipolar stepper motor drive systems
• Hydraulic pump controllers
• Linear actuator drivers
• Solenoid valve control circuits

Procurement Notes

Verify the specific suffix designation against the manufacturer's latest documentation to confirm compliance status and pinout configuration. Ensure that the procurement source provides valid traceability records for the semiconductor batch. Confirm that the component meets the required environmental standards for the intended deployment environment before finalizing acquisition.

Selection Notes

Select this component when a single-chip solution is required for driving bipolar stepper motors or DC loads up to 3A at voltages reaching 55V. It is suitable for applications requiring integrated thermal protection and direct logic interfacing without additional level-shifting circuitry. Consider the TO-220-11 package for through-hole mounting requirements where adequate heat dissipation is managed via board layout or heatsinking.

Part Context

This part belongs to the LMD182xx series of motor drivers from Texas Instruments, which are engineered for industrial and consumer automation tasks. The series leverages DMOS technology to combine power switching and control logic on a single die. This specific model represents a full-bridge variant, distinguishing it from half-bridge counterparts in the same family by enabling complete H-bridge functionality for bidirectional motor operation.

Replacement Considerations

Publicly confirmed substitute part numbers include LMD18245T and LMD18245T/NOPB.B. Verify compatibility regarding pin assignments and thermal characteristics before substitution.