BOOST-DRV8848

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Boost-DRV8848 has become a popular motor driver chip used by many circuit designers for commercial, industrial, and automotive applications. This application note is intended to provide an overview of the capabilities, performance and key features of DRV8848 as well as an explanation of the working principle behind the chip.

The chip is based on Texas Instruments\' Kinetis E-series MCUs and is specifically designed for powering small brushless DC motors ranging from 1.2V to 11V. It is a low-power, compact motor driver that can deliver from 1.8A to 3A continuous output current with a wide operating voltage range up to 24V. The package comes in a 4-pin DIP package and has a maximum power dissipation of 7W.

The chip features a single-phase full bridge gate driver with adjustable current sensing, temperature protection, over-current protection, and over-temperature protection. It has an advanced step down voltage converter with adjustable current limit and protection features, as well as a STEP input for motor positional control. The chip features a variety of features such as a programmable logic controller, pulse width modulation, and hall effect current sensing for further customization of the drive circuit.

DRV8848 supports a wide range of motor types including stepper, DC brushless, and AC brushless motors. It also provides a high degree of protection in case of a fault or malfunction in the motor. The chip also features a low-power standby mode which reduces the power consumption when the motor is not in use and a soft-start mode which reduces the peaks of torque during startup.

The DRV8848 works by providing current to the motor windings to generate a continuous motion of the motor. The chip uses the PWM inputs to adjust the amount of current sent to the motor and the STEP input to adjust the direction of the motor. It also has the hall effect current sensing feature which is used to monitor the amount of motor current used.

The DRV8848 also supports a range of motion control functions such as pulse width modulation control, velocity control, speed control, and position control. It also has adjustable current limiting features, variable speed control, and fault protection. These features help to make the chip ideal for use in commercial, industrial, and automotive applications where motion control accuracy and precision are important.

The chip is ideal for many applications due to its ease of use, wide operating voltage range, wide range of motor types supported, and its advanced features. Its low power consumption, compact size and customizable options make it a perfect choice for circuit designers. The DRV8848 is a versatile motor driver chip that can be used in a variety of different applications including industrial, automotive, and commercial applications.

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