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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 is a discontinued full-bridge power MOSFET controller manufactured by Allegro MicroSystems. Designed for automotive applications, it supports brushed DC motors with a supply voltage range of 7V to 40V. The device integrates pre-drivers and control logic for commutation and direction management within a 28-TSSOP package featuring an exposed pad for thermal dissipation. It operates across a temperature range of -40°C to 135°C.
Feature Summary
- Integrates full-bridge power MOSFET controller with pre-driver outputs for two half-bridges
- Provides dedicated control functions for motor commutation and direction management
- Engineered for robust operation in automotive-grade environments
Applications
- Brushed DC motor control systems
- Automotive actuator drives
- Directional motor management circuits
Procurement Notes
This component is officially obsolete and no longer in production. Verification of availability requires checking authorized distributors for remaining stock or approved replacement parts. Ensure compliance with RoHS status, which indicates non-compliance for this specific part number. Confirm package integrity and authenticity through certified supply chains before integration into designs.
Selection Notes
Select the A3940KLP only for legacy system maintenance or repair where original specifications are mandatory. For new designs, consider alternative packages such as the SOIC variant (A3940KLW) if pin compatibility allows. Evaluate thermal requirements carefully due to the TSSOP-EP form factor and ensure the design accommodates the specific interface and voltage constraints defined in the datasheet.
Part Context
The A3940KLP belongs to the A3940 family of full-bridge controllers from Allegro MicroSystems. It shares core functionality with other variants like the A3940KLW but differs in physical packaging. The TSSOP-EP package offers a smaller footprint compared to standard SOIC options while maintaining similar electrical characteristics for automotive brushed DC motor applications.
Replacement Considerations
The A3941KLPTR-T is listed as a similar replacement option for the A3940KLP. Verify functional equivalence and pinout compatibility before substitution.
