VNH7070BASTR Integrated Circuits (ICs)

The VNH7070BASTR is a monolithic motor driver system intended for automotive applications that combine an H-bridge and full protection circuitry. It accommodates various motor types, such as brush and brushless DC motors. This system can be operated from a single supply, which makes it ideal for battery powered applications.

The driver provides separate logic inputs for controlling the speed and direction of the motor. Power is supplied to the motor through a low impedance or low side drive that can be used with an external PWM signal.

The VNH7070BASTR system is composed of three main components: an H-bridge power transistor, an active gate drive, and a driver stage. The H-bridge is composed of four MOSFETs arranged in the familiar H-bridge configuration. The two transistors are controlled by two control signals, motor speed and direction.

The active gate drive circuit prevents unsafe body voltages between the MOSFETs of the H-bridge. A BiCMOS circuit supplies a voltage to the gates of the MOSFETs that is dependant on the operating temperature and can be programmed within specified limits.

The driver stage is composed of two drivers and a failure monitor. These drivers supply the control signals to the H-bridge. The failure monitor monitors the drivers and flips the logic signal of the H-bridge to prevent excessive heat build up during a fault condition.

The VNH7070BASTR system is an ideal solution for automotive applications where efficiency and reliability are paramount. It is suitable for use in systems where the motor is used for actuation of servos, fuel pumps, and transmission systems. The driver architecture is robust and can handle sustained motor loads up to 8A. It also provides overcurrent and thermal protection, as well as undervoltage lockout.

The integrated protection mechanisms of the VNH7070BASTR help protect the system against thermal and mechanical failure. The protection can be enabled or disabled through a pin. The system also includes reverse current blocking and short circuit protection.

In summary, the VNH7070BASTR system provides a reliable, high efficiency solution to drive motors in automotive applications. It integrates a power transistor, active gate drive, driver stage, and protection circuitry, making it an ideal option for applications that require high reliability and minimum power consumption.