A3946KLPTR-T

Overview

The A3946KLPTR-T is a half-bridge power MOSFET controller manufactured by Allegro MicroSystems. It operates with a supply voltage range of 7V to 60V and supports AC, DC, and brushless DC motor types. The device features an on-chip charge pump for high-current gate drive and bootstrapped operation enabling 100% duty cycle. It includes overtemperature and undervoltage protection mechanisms. The component functions as a pre-driver with commutation and direction management capabilities. It is housed in a 16-eTSSOP package with exposed pad and operates within a temperature range of -40°C to 135°C.

Feature Summary

• Integrates an on-chip charge pump to support minimum 7V input supply and enable high-current gate drive for N-channel MOSFETs.
• Provides bootstrapped gate drive capability allowing for 100% duty cycle operation in half-bridge configurations.
• Includes built-in overtemperature and undervoltage protection to ensure reliable system performance under varying conditions.

Applications

• Brushed DC motor control
• Brushless DC (BLDC) motor control
• AC motor applications

Procurement Notes

Verify the manufacturer part number A3946KLPTR-T against official Allegro MicroSystems documentation to confirm authenticity. Ensure the received components match the specified 16-eTSSOP-EP package and RoHS3 compliance status. Check for moisture sensitivity level 2 requirements during storage and handling. Confirm that the ordering suffix corresponds to the tape and reel packaging format intended for surface mount assembly processes.

Selection Notes

Select this component when a half-bridge driver with integrated charge pump is required for N-channel MOSFETs. It is suitable for applications needing 100% duty cycle operation without external bootstrap components. Consider the 7V to 60V supply range and automotive-grade temperature specifications. Ensure the design accommodates the 16-pin TSSOP footprint and thermal requirements associated with the exposed pad.

Part Context

The A3946KLPTR-T belongs to the A3946 family of power MOSFET controllers from Allegro MicroSystems. It is designed for general-purpose motor control applications requiring robust half-bridge driving capabilities. The device integrates essential protection features and gate drive logic into a compact surface-mount package, simplifying the design of motor driver circuits for various industrial and consumer applications.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.