A6862KLPTR-T

Overview

The A6862KLPTR-T is an automotive-grade, three-phase isolator MOSFET gate driver designed for high-voltage phase isolation applications. It operates with a supply voltage range of 4.5 V to 50 V and supports TTL logic inputs. The device features three independent high-side floating gate drive outputs capable of driving power MOSFETs within a three-phase solid-state relay configuration. It integrates a charge pump regulator to maintain sufficient gate drive voltage above the battery supply, ensuring continuous conduction even when phase voltage equals battery voltage. Key electrical parameters include a maximum turn-on delay of 3 µs, a maximum turn-off delay of 2.25 µs, and a maximum dead time of 0.5 µs. The quiescent supply current is 11 mA, and the on-resistance is 10 Ohms. It functions reliably within an operating temperature range of -40°C to +150°C.

Feature Summary

• Integrates three independent high-side floating gate drivers for controlling N-channel MOSFETs in three-phase configurations.
• Includes an internal charge pump regulator that maintains adequate gate drive voltage relative to the phase voltage.
• Features integrated undervoltage monitoring to verify power supply and gate drive voltages are sufficient for safe MOSFET operation.
• Supports low-power sleep mode via two independent activation inputs when the charge pump is disabled.

Applications

• Electric Power Steering (EPS) systems
• Automotive braking systems
• Safety-critical automotive motor control applications

Procurement Notes

Verify the specific suffix KLPTR-T corresponds to the TSSOP-16 package with exposed pad and reel/cut-tape packaging options. Confirm RoHS compliance status through official Allegro documentation. Ensure design compatibility with the specified 4.5 V to 50 V supply range and TTL logic levels. Check for moisture sensitivity classification requirements during storage and handling. Validate that the thermal performance of the TSSOP-16 package meets the application's heat dissipation needs.

Selection Notes

Select this component for applications requiring galvanic isolation between control logic and high-voltage power stages in three-phase motor drives. It is suitable where high phase voltage slew rates and fast switching speeds are necessary. Consider the integrated charge pump if the application demands maintaining MOSFET conduction when phase voltage matches battery voltage. Evaluate the thermal constraints of the TSSOP-16 package against the expected power dissipation. Ensure the system architecture can accommodate the specified propagation delays and dead times.

Part Context

The A6862 belongs to Allegro MicroSystems' portfolio of automotive isolator gate drivers. It is part of the A6862 series, specifically designed for phase isolation in three-phase BLDC motor applications. The device addresses the need for robust control of power MOSFETs in environments with high common-mode voltages. It complements other Allegro solutions by providing a dedicated interface for connecting motors to control systems while maintaining electrical isolation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Allegro MicroSystems technical support or official datasheets for direct replacements or pin-compatible alternatives.