UDN2916LB

Motor Drivers, Controllers Overview

The UDN2916LB is a dual full-bridge PWM motor driver IC designed for bipolar stepper and brushed DC motors. It features an integrated PWM current control system with a continuous output current of 750 mA per channel. The device supports an output sustaining voltage up to 45 V and operates on a logic supply voltage range of 4.75 V to 5.25 V, while the load voltage range extends from 10 V to 45 V. Housed in a 24-SOIC package, it includes internal clamp diodes, thermal shutdown circuitry, and low output saturation voltage characteristics.

Motor Drivers, Controllers Feature Summary

• Integrated PWM current control mechanism for precise winding current regulation
• Built-in thermal shutdown and overcurrent protection circuits
• Internal clamp diodes eliminate need for external flyback components
• Supports multiple excitation modes including 1-phase, 2-phase, and half-step

Motor Drivers, Controllers Applications

• Bipolar stepper motor control in tax control printers
• Brushed DC motor drives in industrial automation equipment
• Motor control modules for point-of-sale (POS) systems
• Precision motion control in medical devices

Motor Drivers, Controllers Procurement Notes

Verify component authenticity through authorized Allegro MicroSystems distributors or certified partners. Confirm package marking matches the 24-SOIC specification and check date codes against manufacturing records. Ensure storage conditions comply with moisture sensitivity level requirements prior to soldering. Request batch-specific test reports to validate electrical parameters against datasheet limits.

Motor Drivers, Controllers Selection Notes

Select this component when driving bipolar stepper or brushed DC motors requiring integrated PWM current limiting. It is suitable for applications needing a single-chip solution with built-in protection features. Consider the 750 mA current limit and 45 V voltage rating when sizing for specific motor loads. Evaluate thermal performance based on ambient temperature and PCB copper area available for heat dissipation.

Motor Drivers, Controllers Part Context

The UDN2916LB belongs to Allegro MicroSystems' family of dual full-bridge motor drivers. It serves as a direct replacement for legacy parts like the Dual PBL3717 and UC3770. The device integrates power stage, control logic, and protection circuits into a single package, simplifying design complexity compared to discrete solutions. It targets cost-sensitive applications requiring reliable motor control without extensive external component count.

Motor Drivers, Controllers Replacement Considerations

Public confirmed substitute part numbers include A2916 and A2919. Verify pin compatibility and electrical parameter alignment before substitution. Check if the alternative device meets the same thermal and current requirements for the specific application.