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Product Detailed Parameters
- Description：IC MOTOR DRIVER 7V-40V 28SOIC
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR)
- Motor Type - Stepper：-
- Motor Type - AC, DC：Brushed DC
- Function：Controller - Commutation, Direction Management
- Output Configuration：Pre-Driver - Half Bridge (2)
- Interface：Parallel
- Technology：Power MOSFET
- Step Resolution：-
- Applications：-
- Current - Output：-
- Voltage - Supply：7V ~ 40V
- Voltage - Load：-
- Operating Temperature：-40°C ~ 135°C (TA)
- Mounting Type：Surface Mount
- Package / Case：28-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：28-SOIC
- Grade：Automotive
- Qualification：-
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Overview
The A3940KLWTR is a discontinued full-bridge power MOSFET controller manufactured by Allegro MicroSystems. Designed for brushed DC motor applications, it operates within a supply voltage range of 7V to 40V and supports an ambient operating temperature from -40°C to 135°C. The component utilizes a 28-SOIC package with a width of 7.50mm and employs parallel interface control. It functions as a pre-driver for two half-bridges, managing commutation and direction. The device is classified as automotive grade but does not comply with RoHS standards.
Feature Summary
- Integrated full-bridge power MOSFET controller architecture
- Automotive-grade reliability classification
- Parallel interface for commutation and direction management
Applications
- Brushed DC motor drive systems
- Automotive motion control applications
- Industrial motor controllers
Procurement Notes
This specific part number is officially discontinued and no longer manufactured by Allegro MicroSystems. Verification of current availability should focus on the designated substitute model, A3941KLPTR-T, which serves as a similar replacement option in the market. Buyers must confirm end-of-life status before procurement planning.
Selection Notes
Selection requires acknowledging the obsolete status of the A3940KLWTR. Designers should evaluate the A3941KLPTR-T as the primary alternative within the same product family. Compatibility checks regarding pinout and electrical specifications against the original design requirements are essential when transitioning to the substitute component.
Part Context
The A3940 series represents Allegro MicroSystems' solution for robust brushed DC motor control. The KLW suffix indicates a 28-SOIC package variant. This controller integrates necessary logic for driving external power MOSFETs in a full-bridge configuration, simplifying the design of high-performance motor drives.
Replacement Considerations
The A3941KLPTR-T is listed as a similar available substitute for the discontinued A3940KLWTR. Engineers should verify functional equivalence and package compatibility before implementation.
