MC34921AER2

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Power Management Integrated Circuits (PMICs) are devices that combine multiple regulators, switches, and voltage detectors into a single package. Motor Drivers, Controllers, are PMICs designed to provide efficient control over electric motors. The MC34921AER2 is a Motor Driver, Controller that has wide applications across many consumer products. This article looks at the MC34921AER2 specs, application field and principles of operation.

Specifications of the MC34921AER2

The MC34921AER2 is a 16-channel motor driver that operates from a voltage range of up to +30V. It is controlled via an I2C interface and can output up to a maximum current of 1 A per channel. The driver is equipped with a high-speed on-chip switching regulator that helps to set speed and direction. It also has two-step input pins to enable manual speed setting. In addition, it is also equipped with fault-detection circuitry to detect and prevent over-current and under-voltage conditions.

The MC34921AER2 is available in a 5 x 5 mm 44-pin QFN package that is RoHS compliant. The total power dissipation is limited to 5 W, with a continuous operating temperature range of -40°C to +125°C.

Application Field of the MC34921AER2

The MC34921AER2 is an advanced motor driver that is suitable for a wide variety of applications in consumer and industrial systems. It is well-suited for applications such as cooling fans, water pumps, blowers, pumps, stepper motors, and other such applications. Due to its high efficiency and easy integration, it is also popularly used in consumer products such as coffee makers, electric shavers, sprinklers, vacuum cleaners and other home appliances.

Operation Principle of the MC34921AER2

The MC34921AER2 is a motor driver controller that controls and drives a motor with its two sets of half-bridge drivers. It is controlled by sending I2C commands via its on-chip I2C controller. The I2C commands determine the on/off state, direction and speed of the motor. The I2C interface can also be programmed to drive multiple motors simultaneously and control their speed, direction and on/off states.

The MC34921AER2 also has two pins for manual speed setting. One is for clock-wise rotation and the other for counter-clockwise rotation. When these pins are activated, the motor will be driven at a pre-determined speed. The current of the motor can be sensed by the current sensing resistor on the MC34921AER2 and limits the overall current supplied to the motor through the use of its fault-detection circuit.

The MC34921AER2 is also integrated with a high-speed switching regulator to ensure efficient and accurate control of the motor. The switching regulator is a DC-to-DC converter that transforms the input voltage into an output voltage, which is used to drive the motor. The switching frequency of the regulator can be set to match the load requirements.

Conclusion

The MC34921AER2 is an advanced motor driver IC designed for applications requiring high-efficiency with easy integration and control. This device helps to provide efficient control over electric motors and has a broad range of applications including cooling fans, water pumps and stepper motors for industrial and consumer systems. This IC combines a high-speed on-chip switching regulator with a two-step input pin and fault detection circuitry, which enables easy and accurate control of motor speed, direction, and current.

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