AM4961GSTR-G1

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PMIC - Motor Drivers, Controllers is a type of integrated circuit designed to provide motor control and power management functions. Among these circuit elements, AM4961GSTR-G1 is a high-performance, 3-phase brushless DC motor driver. It is used to control 3-phase brushless DC motor in applications such as automotive and industrial. This application field mainly include automotive, electric tools, home appliances, industrial equipment, and medical devices.

AM4961GSTR-G1 is a full bridge driver chip, enabling a 3-phase brushless DC (BLDC) motor to be easily and quickly connected to a microcontroller. It has an integrated 4-channel gate drive, which enables fast and smooth switching behavior. Additionally, it offers superior performance in terms of speed, continuous current, peak current, thermal performance and EMI/ESD protection. It supports locked anti-phase and sinusoidal drive methods, and also supports under-voltage lockout, thermal shutdown and short-circuit protection.

The working principle of AM4961GSTR-G1 is based on the three main stages: the power stage, the control logic stage and the protection stage. Power stages includes two power MOSFETs in each phase to drive the motor windings. The control logic stage is used to capture and interpret the signals from the microcontroller, and provide the triggering point to the power stage.

The protection stage, which consists of various protection items, includes under-voltage lockout, over-current protection, over-voltage protection, temperature protection, and output status monitor. The over-current protection can either be set to a value or it can be measured via external sensing elements. The output status monitor tracks the status of each MOSFET to trigger warnings when needed. This prevent any potential damage to the motor or the driver.

In conclusion, the AM4961GSTR-G1 is a high-performance driver mainly used in applications such as automotive, electric tools, home appliances, industrial equipment and medical devices. It is composed of three main stages, the power stage, control logic stage and protection stage, and has various protection items to ensure the motor and driver are not damaged due to incorrect settings.

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