L6472H

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Power management integrated circuits (PMIC) involve a broad range of components and technologies aimed at efficiently managing the power of a system.PMICs are used in many consumer electronics, telecommunications, automotive, and computer applications, as well as throughout industrial manufacturing. A motor driver is a type of PMIC that is used to control and power electric motors. The STMicroelectronics L6472H is an advanced motor driver IC for both brushed dc and stepper motors. This article provides an overview of the L6472H, including its application field and working principle.

Application Field

The L6472H belongs to the FlexPath motor-driver family from STMicroelectronics, which is designed for use in demanding motor control applications. The device provides advanced features such as sensor-less current control, smooth start-up, adjustable speed profile, and multiple power-saving modes. It is suitable for a wide range of applications, including consumer electronics, home appliances, automotive components, industrial automation, and medical devices.

In terms of motor type, the L6472H can be used with both brushed DC and stepper motors. For example, it can be used in robotic arms and 3-D printers, which are two of the most common applications for stepper motors. Additionally, its adjustable speed profiles make it suitable for driving dc fans and pumps, both of which require precise speed control.

Working Principle

The basic working principle of the L6472H is to control the power flow to a motor to achieve the desired speed and torque output. In the case of brushed DC motors, the IC provides power to the motor via two motor terminals, while in the case of stepper motors, it provides the power via eight motor terminals.

The IC contains several components designed to optimize the power flow to the motor, such as PWM-based current control, adjustable speed profiles, and multiple power-saving modes. When the IC is powered on, the microcontroller in the chip (MCU) will set up the speed, acceleration, and deceleration profiles for the required motor speed. Then, according to the set parameters, the IC will vary the PWM duty cycle to adjust the power output of the motor.

For example, when the IC is required to increase the motor speed, the MCU will set a higher duty cycle for the PWM signal and this will provide more power to the motor, thereby increasing its speed. Conversely, when the IC is required to reduce the motor speed, the MCU will set a lower duty cycle for the PWM signal, which will reduce the power supplied to the motor, and thus reduce its speed.

Additionally, the IC also contains several power-saving features in order to reduce power consumption when the motor is idle. For example, the IC supports low-power sleep and standby modes, as well as providing the option to disable power to the motor completely when not in use.

Conclusion

In conclusion, the STMicroelectronics L6472H is a versatile motor driver IC for both brushed DC and stepper motors. It is ideal for a wide range of applications, including consumer electronics and industrial automation, and provides features such as sensor-less current control, smooth start-up, adjustable speed profile, and multiple power-saving modes. The basic working principle of the IC is to control the power flow to a motor by adjusting the PWM duty cycle of the signal.

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