A3935KLQ

Overview

The A3935KLQ is a three-phase brushless DC motor controller and driver manufactured by Allegro MicroSystems. It operates with a supply voltage range of 4.75V to 5.25V and supports load voltages from 7V to 40V. The device utilizes power MOSFET technology and features a parallel interface for control signals. It is housed in a 36-lead QSOP package designed for surface mount installation. The component is rated for an operating temperature range of -40°C to 135°C and holds automotive grade classification.

Feature Summary

• Integrated controller providing commutation and direction management for three-phase BLDC motors
• Built-in pre-driver stage utilizing three half-bridge configurations
• Designed for automotive applications with specified thermal and electrical ratings

Applications

• Automotive brushless DC motor control systems
• Commutation and direction management circuits
• Surface mount motor driver implementations

Procurement Notes

Verify the specific suffix and package variant when sourcing, as the A3935KLQ is listed as obsolete or not recommended for new designs in some databases. Confirm RoHS compliance status, as variations exist between leaded and tape-and-reel versions. Ensure the 36-QSOP package matches the target PCB footprint. Cross-reference with current Allegro MicroSystems recommendations for active replacements due to end-of-life status.

Selection Notes

Select this component only if the design requires a 4.75V to 5.25V logic supply and a 7V to 40V load voltage range. The 36-pin QSOP package dictates specific board space requirements. Verify that the parallel interface aligns with the system's control architecture. Consider the automotive grade rating for environmental resilience. Check for available substitutes like the A4933KJPTR-T if new production is required.

Part Context

The A3935KLQ belongs to the A3935 series of three-phase BLDC motor controllers from Allegro MicroSystems. This series is engineered for integrated motor drive solutions combining control logic with power output stages. The device is part of Allegro's portfolio targeting automotive and industrial motion control applications requiring reliable commutation management.

Replacement Considerations

Public documentation identifies the A4933KJPTR-T as a suggested replacement device for the A3935KLQ.