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PMIC - Motor Drivers, Controllers

The AM9789M8TR-G1 motor offers an integrated motor control solution, which is designed to drive permanent magnet synchronous motors (PMSM) and stepper motors. The device is intended for consumer, industrial and medical applications. It operates as a configurable three-phase motor driver, meaning the device is capable of controlling the speed, position and torque of the motor. On top of that, it will protect the motor in the event of a fault, guarding against a motor breakdown.

The AM9789M8TR-G1 motor is a brushless, three-phase motor controller, which features a wide supply voltage, from 8.7V up to 50V. It has a programmable current sense amplifier, which can sense two or three phase current and use it for closed loop current control or other control algorithms. The device also features two flexible PWMs for third order current control, which make it possible to precisely control the speed and torque of the motor.

The most notable features of the AM9789M8TR-G1 motor are the wide operating temperature range, from -40°C up to +125°C, the integrated protection against over temperature, over-current, over-voltage and under-voltage, as well as the advanced current sensing. The chip also has integrated monitoring of motor voltage and current, which allows precise control of motor control parameters.

The AM9789M8TR-G1 motor is equipped with a number of diagnostic pins, which allow detection of motor faults and their causes, such as shorted phases, short-circuits and over-temperature. Also, the device contains a programmable open loop current limit, which helps protect the motor against running out-of-control.

The working principle is relatively simple. The device takes the power from an external power supply, and it is responsible for controlling the PMSM or stepper motor. The speed and position of the motor are regulated with direct voltage control. This control can be modified with the internal oscillator, which can be programmed to achieve the desired output. It is also capable of controlling the torque of the motor with a PWM-output, and it can also provide a form of current regulation to prevent overloading of the motor.

In summary, the AM9789M8TR-G1 motor combines the features of low-voltage and wide-range operation, along with programmable current sensing and advanced protection features. It makes an ideal solution for a variety of motor control applications, from consumer to industrial and medical, and its working principle makes it an excellent choice for controlling the speed, position and torque of PMSM and stepper motors.

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