AUIR2085STR

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The AUIR2085STR is an integrated gate driver device that is part of the Power Management Integrated Circuit (PMIC) product family. As such, it is designed to provide maximum control of a three-phase power MOSFET circuit by driving the necessary gate signals for each of the three switches. Primarily designed for AC/DC converters, the Auir2085STR features a wide operating range, from 4.1v to 20v. It also has a wide RoHS operating temperature range from -40°C to +160°C.

The Auir2085STR uses a multi-stage MOSFET driver architecture to achieve fast switching, improved efficiency and minimal switching noise. It utilizes two external bidirectional enable signals to control the output enable and enable the internal slew and dead time delays. The output circuits of each stage have complementary outputs, providing a full H-bridge configuration. Each output circuit contains low-side and high-side FETs that are driven by the same gate charge. The FETs are controlled independently to provide programmable protection of the motor and microcontroller. This allows for more precise control of motor speed and torque.

The Auir2085STR is designed to provide dynamic current limit protection, as well as static under-voltage, over-voltage and over-current protection. The static under-voltage and over-voltage protection limits are adjustable via external resistors. The over-current protection feature will automatically reset after a fault or over-current. This helps to protect the MOSFETs from damage caused by higher current and keeps the gate drive current at a safe level for the life of the FETs.

In use, the Auir2085STR device typically requires two power supply rails. The primary voltage is used for the logic and control functions, while a separate, isolated supply voltage is needed for the gate driver outputs. This secondary voltage must be greater than or equal to the maximum drain-source voltage of the power MOSFETs. The Auir2085STR also includes optional internal torque control and idle time settings which can be programmed by the user. This allows the user to effectively control the motor current, reduce the risk of failure, and increase efficiency.

Overall, the Auir2085STR is an efficient and reliable gate driver device in the PMIC family. Its specific gate driver circuit, along with its comprehensive protection features, makes it ideal for AC/DC converters and other applications requiring fast switching and precision control of the motor.

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