A3968SLB

Overview

The A3968SLB is a dual full-bridge PWM motor driver manufactured by Allegro MicroSystems. It is designed to bidirectionally control two DC motors, featuring two H-bridges capable of continuous output currents of ±650 mA and operating voltages up to 30 V. The device utilizes internal fixed-frequency pulse-width modulated current-control circuitry for motor winding current regulation. It operates within a supply voltage range of 4.75 V to 5.5 V and supports junction temperatures from -20°C to 150°C. The component is housed in a 16-SOIC surface-mount package.

Feature Summary

• Integrates two H-bridges for bidirectional control of two DC motors
• Includes internal fixed-frequency PWM current-control circuitry
• Features internal thermal-shutdown, crossover-current protection, and UVLO
• Contains internal ground-clamp and flyback diodes

Applications

• Bidirectional DC motor control systems
• General-purpose motion control applications
• Industrial automation equipment requiring dual motor drive

Procurement Notes

Verify the specific suffix 'SLB' confirms the 16-SOIC surface-mount package configuration. Confirm RoHS compliance status as documentation indicates potential non-compliance for this variant. Validate that the 4.75V to 5.5V supply voltage range aligns with system power requirements. Ensure the ±650mA continuous current rating meets load demands without exceeding thermal limits.

Selection Notes

Select this component when dual independent DC motor control is required in a compact surface-mount form factor. The integrated PWM current control simplifies design by reducing external component count. Consider the 30V output voltage rating for compatibility with standard low-voltage motor loads. Evaluate the wide junction temperature range for operation in demanding thermal environments.

Part Context

The A3968 series comprises dual full-bridge drivers designed for DC motor applications. The A3968SLB specifically denotes the SOIC package variant, while other suffixes like 'SA' indicate DIP packages. These devices share identical electrical characteristics and pinouts, differing primarily in physical housing style to accommodate various PCB mounting preferences.

Replacement Considerations

A3968SA (DIP package equivalent)

FAQ

What is the maximum continuous output current per bridge?

Each H-bridge is capable of delivering a continuous output current of ±650 mA.

Does the device include protection against short circuits or over-temperature?

Yes, it includes internal thermal-shutdown circuitry, crossover-current protection, and UVLO protection.