A4960SJPTR-T

Overview

The A4960SJPTR-T is a three-phase sensorless brushless DC (BLDC) motor controller designed for automotive applications. It operates with external N-channel power MOSFETs and utilizes trapezoidal commutation based on back-EMF monitoring, eliminating the need for position sensors. The device supports a supply voltage range of 7V to 50V and is compatible with 3.3V and 5V logic interfaces. It features an integrated charge pump for low-voltage operation, programmable startup parameters, and comprehensive diagnostic outputs including undervoltage, overtemperature, and bridge fault indications. The component is housed in a 32-lead LQFP package with an exposed pad for thermal management.

Feature Summary

• Sensorless BLDC control using back-EMF monitoring for commutation
• Integrated gate drivers for external N-channel MOSFETs
• Comprehensive diagnostic output with detailed fault reporting
• Programmable startup and cross-conduction protection

Applications

• Automotive hydraulic pumps
• Fuel pumps
• Urea pumps
• Fan blowers

Procurement Notes

Verify the specific suffix 'S' indicates the commercial temperature grade (-20°C to 85°C), distinct from the 'K' automotive grade. Confirm RoHS compliance status as specified in official datasheets. Check for obsolescence notices or PCNs affecting availability. Ensure the 32-lead LQFP footprint matches PCB design requirements. Validate that external MOSFET selection aligns with the 50V rating and current capabilities.

Selection Notes

Select this model for applications requiring sensorless BLDC control without position sensors. Suitable for systems operating between 7V and 50V. Choose if integration of diagnostics and charge pump functionality reduces component count. Verify compatibility with 3.3V or 5V logic levels. Consider the -20°C to 85°C operating range for non-extreme environment applications.

Part Context

Part of the Allegro A4960 family of sensorless BLDC controllers. Designed specifically for automotive markets. Uses external power MOSFETs rather than integrated high-current drivers. Focuses on cost-effective solutions for fuel and fluid pumping systems. Differentiated by its sensorless architecture and integrated protection features.

Replacement Considerations

A4960KJPTR-A-T offers the same functionality but with an extended automotive temperature range (-40°C to 150°C). Verify if the wider temperature range is required for the specific application environment. Both parts share the same pinout and functional specifications.

FAQ

How does the A4960SJPTR-T determine rotor position?

It uses back-EMF monitoring to detect zero-crossing points for commutation, eliminating the need for physical position sensors.

What type of MOSFETs are required?

External N-channel power MOSFETs are required, driven by the integrated gate drivers within the controller.

Does the device include a charge pump?

Yes, it includes an integrated charge pump to ensure proper gate drive voltage for the external N-channel MOSFETs during low supply voltage operation.