MC33887VW

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PMIC, or Power Management IC, is an integrated circuit (IC) for managing and converting power for an electronic device. Motor drivers, controllers, or drivers, are components of PMICs that can drive motors, or the applications of the motors. The MC33887VW is an example of such a motor driver, and this article will discuss its application fields and working principle.

Application Fields

The MC33887VW is a monolithic H-Bridge driver integrated circuit, which is suitable for driving DC motors and Stepper motors. It is often used in applications such as vehicle fan control systems, air conditioners, industrial pumps, and automotive wipers. It also provides a high level of protection against over-current (OCP) and over-temperature (OTP) conditions, making it an ideal choice for applications that require reliability and protection.

Working Principle

The MC33887VW is an H-bridge driver integrated circuit, meaning it is capable of driving both directions of a DC motor. This is made possible by its four MOSFETs, which are connected in an H-bridge configuration. When controlling the motor\'s direction, the four MOSFETs are switched on and off in pairs, with one pair sourcing current and another sinking current. The two pairs are swapped at a rate of approximately 20kHz to ensure that the motor is driven in the direction of the applied current.

The MC33887VW also features an integrated saw tooth oscillator, which is used to control the current through the motor. The oscillator generates a saw tooth waveform, which is then compared with a PWM signal, and the motor is driven at the frequency set by the PWM signal. Furthermore, the MC33887VW is also equipped with a driver stage, which boosts the current through the motor by up to 40 times, allowing it to drive large motors with high current requirements.

Conclusion

The MC33887VW is a powerful motor driver integrated circuit, which is suitable for driving DC and Stepper motors in a variety of applications. Its H-bridge configuration allows it to drive motors in both directions, while its integrated saw tooth oscillator and driver stage enable it to control the current through the motor, and to drive large motors with high current requirements.

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