STK621-033C-E

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PMIC - Motor Drivers, Controllers

The STK621-033C-E is a 3-phase Brushless DC (BLDC) motor driver with a built-in FET controlling circuit and includes high functional capabilities that are common among various types of microcomputers. It uses a high-efficiency driver IC and controller, enabling high-speed operation of the motor with fewer switching of its transistors.

The STK621-033C-E is suitable for driving a wide variety of medium-sized BLDC motors, boosting its efficiency and allocating capability to drive multiple motors. It can also be used in applications such as electric power steering and drive systems for home appliances.

Working Principle

The STK621-033C-E is a 3-phase motor driver composed of a power driving unit, control unit, and microcomputer interface circuit. It also comprises BLDC control ICs and a wide range of peripheral circuits comprising an external FET, photo couplers, and a power management circuit.

The power driving unit can handle the outputs of the inverters with the assistance of the 3-phase DC power circuit and the counter electromotive force suppressor circuit. It produces an output voltage that can drive a 3-phase motor in either a one-direction or a reversible rotation mode. The power driving unit can be PWM (pulse-width-modulation) controlled to adjust the voltage output.

The control unit controls and monitors the BT621 controls and the operation from the BT621 based on the signals from the microcomputer. It also provides a measured value output, voltage output, current output, and other control commands.

The microcomputer interface circuit consists of the I/O ports, power source control circuit, and various port control circuits. It also includes an over-current and over-voltage monitoring circuit and a PWM signal control circuit that can adjust the speed and direction of the motor.

Applications

The STK621-033C-E can be used in a wide range of applications including electric power steering systems, drive systems for home appliances, high-speed fans, and other applications where reliable and efficient speed control is required.

It is particularly suitable for maintaining the speed of a motor even under high-speed, high-load conditions, making it an ideal choice for applications that require accurate speed control.

The STK621-033C-E also provides a comprehensive diagnostic system including over-voltage, over-current, and over-temperature protection, allowing for easy and safe troubleshooting.

In addition, the STK621-033C-E is easy to use and customizable, allowing users to adjust the circuit parameters to suit their own individual needs.

Conclusion

The STK621-033C-E is a 3-phase motor driver with built-in FET controlling circuit, making it suitable for driving a wide variety of medium-sized BLDC motors with fewer switching of its transistors. It enables high-speed operation and provides reliable and efficient speed control under high-speed, high-load conditions. The STK621-033C-E also offers a comprehensive diagnostic system and is easy to use and customize according to individual needs.

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