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Product Detailed Parameters
- Description：IC MOTOR DRIVER 3V-5.5V 28TSSOP
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Motor Type - Stepper：-
- Motor Type - AC, DC：Brushed DC
- Function：Controller - Commutation, Direction Management
- Output Configuration：Pre-Driver - Low Side (6)
- Interface：SPI, Parallel
- Technology：NMOS
- Step Resolution：-
- Applications：-
- Current - Output：-
- Voltage - Supply：3V ~ 5.5V
- Voltage - Load：-
- Operating Temperature：-40°C ~ 150°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 A3944KLPTR-T is an automotive-grade brushed DC motor driver manufactured by Allegro MicroSystems. It integrates a low-side MOSFET pre-driver with SPI and parallel interfaces for precise control. The device operates within a supply voltage range of 6V to 40V and supports output currents up to 40 mA. Designed for harsh environments, it functions between -40°C and +150°C. Packaged in a 28-pin TSSOP-EP, it includes features such as direction management and commutation control.
Feature Summary
- Integrates SPI and parallel interface options for flexible system communication
- Includes internal charge pump regulator enabling full gate drive at low battery voltages
- Provides diagnostic outputs indicating under-voltage, over-temperature, and power bridge faults
Applications
- Automotive window lift actuators
- Seat adjustment motors
- HVAC blower fan control systems
Procurement Notes
Verify the specific suffix 'T' indicates tape-and-reel packaging configuration. Confirm RoHS compliance status matches current manufacturing standards. Ensure ESD handling protocols are followed during assembly due to moisture sensitivity level classification. Validate pinout compatibility with target PCB layout before finalizing procurement orders.
Selection Notes
Select this component when designing brushed DC motor applications requiring integrated low-side driving capabilities. It is suitable for systems needing both SPI and parallel interface support. Consider its automotive temperature rating for under-hood or exterior mounting locations. Evaluate the 28-pin TSSOP-EP package constraints against available board space requirements.
Part Context
This part belongs to the A3944 series of automotive motor drivers. It complements other Allegro solutions like the A3941 and A3942 by offering specialized low-side pre-driver functionality. The series targets high-volume automotive production lines requiring robust fault protection and diagnostic feedback mechanisms.
Replacement Considerations
Check datasheet compatibility for direct pin-to-pin replacements within the same family. Verify electrical parameter overlaps if substituting with similar Allegro models.
