AH291-PL-B

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Power management integrated circuit (PMIC) is a device usually used for power management and motor control in modern electronics. PMICs are found in virtually every portable device, including laptops, mobile phones, tablets and portable media players, to name a few. One of the most common PMICs currently in use is the AH291-PL-B motor control and power management integrated circuit. This article will discuss the application field and working principle of the AH291-PL-B.

What is the AH291-PL-B PMIC?

The AH291-PL-B is a PMIC designed for controlling and managing power in motor-based applications. It is a three-phase driver and controller that can be used in DC synchronous servo motors, stepping motors, AC induction and synchronous reluctance motors, and other related applications. It features an integrated high-performance dual-mode S-PWM textured modulation strategy, allowing it to achieve outstanding performance, excellent EMC compliance and improved motor efficiency, as well as superior driving performance when compared to traditional pulse width modulation (PWM) methods. The AH291-PL-B is also designed to be easy to integrate into a system, reducing the overall development time and cost.

Application Field

The AH291-PL-B motor controller and power management integrated circuit is designed for motor-based applications such as robotics and industrial automation and control, as well as for automotive and appliance applications. Its high-performance dual-mode S-PWM textured modulation strategy allows it to achieve superior driving performance and excellent EMC compliance when compared to traditional PWM implementations. In addition, the integrated system protection functions and additional features, such as a variety of adjustable current loop functions and an over-temperature protection circuit, make the AH291-PL-B suitable for various motor-based applications.

Working Principle

The basic working principle of the AH291-PL-B is to provide power to the motor and manage the controlled power. The AH291-PL-B converts a DC power supply into a textured AC modulation signal to drive the motor. This AC modulation signal is then fed to the motor’s coils using the three-phase bridge. The bridge will then cause the motor to rotate and the motor will draw a certain amount of current from the DC power supply. The controller then monitors the current drawn by the motor and adjusts the voltage and frequency of the AC modulation signal to maintain the preset motor speed.

The AH291-PL-B also has several system protection and current loop adjustment functions, such as an over-temperature protection circuit, an adjustable current loop and a speed control loop, which can be adjusted according to the specific application requirements. The over-temperature protection circuit will shut down the power supply to the motor if it senses that the motor temperature is too high. The adjustable current loop allows the user to set the ideal current and frequency of the motor. Lastly, the speed control loop is used to adjust the speed of the motor so that it can be controlled accurately and precisely.

Conclusion

The AH291-PL-B motor control and power management integrated circuit is a highly efficient, easy to integrate and cost-effective PMIC designed for use in motor-based applications. It features an integrated high-performance dual-mode S-PWM textured modulation strategy, allowing it to achieve superior driving performance when compared to traditional pulse width modulation (PWM) methods. In addition, the AH291-PL-B also has several system protection and current loop adjustment functions, making it suitable for various motor-based applications.

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