MC33926ES

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Power Management Integrated Circuits (PMICs) are electronic components that are used to control and manage power flow in and out of a device. PMICs are used in a wide variety of applications, ranging from portable electronics to large-scale industrial systems. One type of PMIC is the Motor Drivers, Controllers. These components provide the necessary electrical and mechanical control to drive and control the operation of motors. The MC33926ES is an example of a Motor Drivers, Controllers PMIC. In this article we will take a look at the application field and working principle of the MC33926ES.

The MC33926ES is a parmanent magnet (PM) brush motor driver and controller. It is designed to provide drive capabilities to various DC Brush Motors used in automotive applications, including electric power steering, power window lift, power seats and cooling fan modules. The MC33926ES offers current control, position sensor monitoring, overcurrent protection and thermal protection, making it an ideal choice for automotive motor control applications.

The MC33926ES integrates a dual-channel H-bridge motor driver capable of delivering up to 2.6A peak current and 1.3A continuous current. The device can be operated in both open-loop and closed-loop modes. In open-loop mode, the MC33926ES can be used to drive motors with no external position sensors. In closed-loop mode, the device uses a differential input from a position sensor (trim potentiometer or hall effect) to compare the actual versus desired motor position and provide precise control. The MC33926ES also includes a pulse width modulation (PWM) current controller for regulation of the motor current.

The MC33926ES is designed with a selectable low-side current sensing configuration allowing customers to optimize their application. An internal level shifter is provided that can be used to shift the signal levels between high-side and low-side current sense inputs. This feature eliminates the need for external signal conversion components.

The MC33926ES integrates several protection features to protect the device, the motor, and the system as well. The device includes thermal protection that shuts off the power if the device gets too hot and overcurrent protection that limits the peak current when the motor stalls. It also features a stall detection monitor that monitors the output current of the motor and will alert the user if it detects a stall condition.

The MC33926ES also offers several diagnostic functions including a built-in voltage regulator, current monitoring and reporting, fault detection and reporting, and a diagnostic interface for enhanced communication with the host controller.

In summary, the MC33927ES is a feature-rich motor driver and controller that is suitable for use in a variety of automotive applications. The device offers current control, position sensor monitoring, overcurrent protection, thermal protection, and selectable low-side current sensing to ensure optimal performance. The device also includes a number of diagnostic functions and a diagnostic interface to provide improved communication with the host controller.

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