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Product Detailed Parameters
- Description：IC MOTOR DRIVER 7V-40V 28TSSOP
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tube
- 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-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：28-TSSOP-EP
- Grade：Automotive
- Qualification：-
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Overview
The A3940KLP-T is a discontinued full-bridge power MOSFET controller designed for brushed DC motor applications. It operates within a supply voltage range of 7V to 40V and utilizes a 28-pin TSSOP-EP package with an exposed pad for thermal management. The device supports parallel interface control for commutation and direction management, featuring pre-driver outputs configured as two half-bridges. It is rated for automotive-grade performance across a wide operating temperature range from -40°C to 135°C.
Feature Summary
- Integrated full-bridge controller architecture for external N-channel power MOSFETs
- Built-in charge pump regulator enabling gate drive operation at low battery voltages
- Comprehensive diagnostic capabilities including undervoltage, overtemperature, and fault indication
Applications
- Automotive brushed DC motor control systems
- Vehicle window and seat actuator drives
- Fan and pump motor management in automotive environments
Procurement Notes
This component has reached End-of-Life status and is no longer manufactured by Allegro MicroSystems. Procurement must rely on the designated replacement part number A3941KLPTR-T. Verify that the substitute matches the required package type and electrical specifications before integration into production designs.
Selection Notes
Select this component only if legacy design compatibility is required, as it is obsolete. For new designs, utilize the recommended successor A3941KLPTR-T which offers enhanced features. Ensure the application requires a full-bridge topology compatible with external MOSFETs rather than an integrated driver solution.
Part Context
The A3940 series belongs to Allegro's portfolio of automotive motor drivers targeting high-reliability vehicle applications. This specific model represents a dedicated controller for brushed DC motors, distinguishing itself from integrated driver ICs by requiring external power switching elements for higher current handling capabilities.
Replacement Considerations
The confirmed public substitute is A3941KLPTR-T. This replacement maintains similar functionality while offering updated manufacturing support. Designers should verify pinout compatibility and parameter alignment when transitioning from the discontinued A3940KLP-T to the A3941 variant.
