MAX31785ETL+T

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The MAX31785ETL+T is a motor controller or driver which is part of a range of products in the power management integrated circuit (PMIC) family. It is designed to provide maximum motor control, provide high-precision current regulation, and enable simple and fast system configuration. This device operates from low-voltage to high-voltage supply and is ideal for a variety of industrial applications.

The MAX31785ETL+T is a digital-input motor driver that uses a bi-stable drive methodology to provide digital control of both motor power and direction. It offers integrated current limit settings which enable users to guard against overcurrent and overvoltage conditions. The MAX31785ETL+T also features soft-start functions and protection circuits including thermal shutdown and undervoltage protection.

The MAX31785ETL+T comes in a small 4mm x 4mm, 24-pin QFN or 3mm x 3mm, 20-pin TDFN package. It provides a high switching frequency of 350 kHz and operates over a wide temperature range of -40°C to 125°C.

The MAX31785ETL+T can be used in motor drives and controllers, such as stepper motors, brushless DC motors, and brush-commutated motors. It can also be used in automotive applications, such as radar antenna motors.

Working Principle

The MAX31785ETL+T functions by controlling the power distribution from its power source to the motor. It takes two input signals (Step and Direction) from the microcontroller and translates those signals into a PWM (pulse width modulation) signal. This PWM signal is used to control the speed and direction of the motor by turning its power on and off.

The MAX31785ETL+T is a dual-output driver which means that it can drive two motors simultaneously. It uses P-channel MOSFETs for each output and its high-side MOSFETs provide integrated current-limit protection. This ensures that the motor stays within its operating point and doesn’t exceed its current limit.

The MAX31785ETL+T also incorporates a number of safety features such as thermal shutdown and undervoltage protection. The thermal shutdown feature shuts down the device before it reaches extreme temperatures and the undervoltage protection feature ensures that the device does not operate if the voltage falls below its operating range.

The MAX31785ETL+T also includes a soft-start feature which gradually ramp up the motor voltage. This feature protects against inrush current and helps reduce the motor’s power consumption.

The MAX31785ETL+T also has overcurrent protection which shuts down the device in the event of an overcurrent condition. This helps to protect the motor and the driver against damage and ensures the motor operates safely.

Conclusion

The MAX31785ETL+T is a versatile motor driver/controller that can be used in a wide variety of applications ranging from stepper motors to brushless DC motors to automotive radar antenna motors. It is designed with features such as high-current density, current and thermal protections, soft start, and overcurrent protection to ensure safe and reliable operations. It is an ideal solution for industrial and automotive applications that require precision and high-performance motor control.

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