A3935KLQ-T

Overview

The A3935KLQ-T is a three-phase brushless DC motor controller and driver manufactured by Allegro MicroSystems. It operates with a supply voltage range of 4.75 V to 5.25 V and supports load voltages from 7 V to 40 V. The device features an output current capability of 40 mA and a typical operating supply current of 7 mA. It is housed in a 36-pin QSOP surface-mount package and is rated for automotive-grade applications. The operational temperature range extends from -40°C to +150°C, ensuring reliability in demanding environments.

Feature Summary

• Integrated control logic for three-phase BLDC motor commutation and direction management
• Built-in protection mechanisms against overcurrent and thermal overload conditions
• Designed for automotive-grade reliability with extended temperature operation capabilities

Applications

• Automotive cooling fan systems
• Blower motor control in HVAC units
• Wiper pump drive circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure storage conditions meet specified humidity requirements to prevent damage. Validate that the specific suffix matches design requirements as obsolete status may affect long-term availability.

Selection Notes

Select this component for applications requiring low-voltage logic control driving higher voltage motor loads. Consider the 36-pin QSOP package constraints for PCB layout. Evaluate thermal performance given the high maximum junction temperature rating. Verify compatibility with existing PWM control signals and ensure adequate heat dissipation paths are designed into the system.

Part Context

This part belongs to the A3935 series of integrated motor drivers. It is specifically engineered for automotive applications where robustness and compact size are critical. The device integrates power MOSFETs with control circuitry to simplify system design. It serves as a specialized solution for managing brushless DC motors in vehicle subsystems.

Replacement Considerations

The A4933KJPTR-T is identified as a suggested replacement device. Engineers should verify pinout compatibility and electrical specifications before substitution. Review datasheet differences regarding package dimensions and thermal characteristics to ensure seamless integration.