A3980KLPTR-T

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The A3980KLPTR-T is a 3-phase gate driver for brushless DC (BLDC) motor applications. It is designed for use with a single N-channel MOSFET or IGBT pre-driver and is an excellent choice for advanced motor power control in applications such as electric vehicles, home appliances, industrial and commercial automation, medical equipment and more. Joining the Allegro family of Motor and Motion Control ICs, the advanced A3980KLPTR-T has a variety of features to improve system performance and enable efficient motor control.

Application Field

The A3980KLPTR-T is ideal for the efficient control of brushless motor implementations in a variety of applications, such as electric vehicles and appliances, robotics, industrial and commercial automation, medical equipment and more. The device is compatible with a wide range of microcontrollers, including dsPIC and PIC24, and can be combined with microcontroller-based system solutions for advanced motor control and motion control applications.

Working Principle

The A3980KLPTR-T provides a versatile and integrated solution for BLDC motor control. It features an integrated charge pump and three fully independent MOSFET gate drivers that can drive separate low-side and high-side MOSFETs or IGBTs. The chip operates between 4.5V and 36V, and is supplied with a 5V or bootstrap supply. The device offers a variety of protections, including separate maximum current thresholds, overvoltage protection, undervoltage protection, and thermal shutdown.

The A3980KLPTR-T incorporates a PFM-controlled charge pump for gate drive voltage generation, allowing for robust and low-noise operation. The integrated charge pump provides sufficient gate drive voltage to fully turn on the low-side, high-side, high-side plus and high-side minus gates of the MOSFET and IGBT. The device is controlled with power PWMs, allowing for adjustable voltage, frequency and open loop current control in the high-side, low-side and bootstrap MOSFETs. The device also includes four independent logic inputs for enable, reset, fault and speed control, as well as four open drain outputs to provide logic indications of the device states.

The A3980KLPTR-T also includes several unique features, including a current sense overload protection to protect against excessive motor current, integrated overvoltage protection to prevent the MOSFET gates from the high voltage generated by the motor, and integrated undervoltage protection to prevent the chip from operating at too low of a supply voltage. The device includes an internal sleep mode that can be used to conserve power during motor drive pauses, and a low-power standby mode to reduce current consumption during low/no-load operation. The device\'s constant on-time feature ensures that the power switches in the motor remain fully on, even under most operating conditions. Additionally, the device can be easily configured with a single resistor for speed control.

Conclusion

The A3980KLPTR-T is a powerful and feature-rich integrated solution for BLDC motor control applications. It provides excellent performance and protection, robust gate drive voltage generation, and adjustable control features. The device is an excellent choice for advanced motor power control applications in a variety of industries, including electric vehicles, home appliances, industrial and commercial automation, medical equipment and more.

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