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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-T is a full-bridge power MOSFET controller manufactured by Allegro MicroSystems. It operates within a supply voltage range of 7 V to 40 V and features a 28-SOIC package with an exposed thermal pad. The device supports parallel interface communication for control signals. Designed for automotive applications, it integrates commutation logic and direction management capabilities. The component is rated for high-temperature operation and includes protection features typical of industrial motor driver ICs.
Feature Summary
- Integrates full-bridge control logic for brushless DC motor commutation
- Supports parallel interface for external microcontroller connection
- Includes internal direction management and fault protection mechanisms
Applications
- Automotive cooling fan motors
- Blower motor control systems
- Industrial pump drives
Procurement Notes
Verify the specific suffix 'KLWTR-T' against the manufacturer's current datasheet to confirm pinout compatibility and lead-free status. Ensure the ordering documentation matches the exact part number to avoid receiving obsolete or variant packages. Cross-reference the RoHS compliance status directly with the official Allegro MicroSystems product change notices before finalizing procurement orders.
Selection Notes
Select this component when a dedicated full-bridge controller is required for BLDC motors in automotive environments. The parallel interface suits designs where GPIO availability is sufficient. Consider the SOIC-28 package size for PCB layout constraints. Verify that the input voltage range aligns with the system's 7 V to 40 V operating window.
Part Context
This part belongs to the A3940 family of full-bridge MOSFET controllers. It is functionally similar to the A3940KLPTR-T but utilizes a wide-body SOIC package instead of TSSOP. The series is designed for robust automotive-grade performance, offering integrated gate drive capabilities for external power MOSFETs.
Replacement Considerations
The A3940KLPTR-T serves as a direct functional substitute with identical electrical characteristics but differs in package type (TSSOP vs. SOIC). Verify pin-to-pin compatibility if switching between these variants due to potential footprint differences.
