PMIC - Motor Drivers, Controllers

DRV777DR is a popular motor driver from Sanyo. It is a motor driver and controller specifically designed to meet the needs of applications with high-precision controlling and protection. It has a wide operating temperature range, low junction temperature, and small housing form factor. Furthermore, it offers unparalleled current accuracy, combined with superior protection features.

Features

DRV777DR features include a four selection switch, a driver IC with a voltage range of 12 V to 48 V, and a frequency range of 70 to 1000 KHz. It also contains a low pass filter designed to help eliminate noise, a back electromotive force (EMF) sensing circuit for preventing over-current, and a integrated temperature sensor for safe thermal protection. With these features, it is possible to achieve higher accuracy performance and longer drive life than its competitors.

Application Fields

The primary application field for the DRV777DR is in driving motors in medical and industrial applications. Specifically, this motor driver is suitable for applications that require precise speed regulation, as well as in motor start and stop control. This motor driver can be used in automated systems, such as robotic systems, numerical control machines, and medical equipment. It is particularly suitable for the driving of high precision positioning stages, actuators, and linear motors.

Working Principle

The DRV777DR operates on a four phase current control technique. It works by switching between two different external supplies to generate two different output currents. Depending on the number of phases chosen, the driver can generate drive currents equal to one of the two external supplies. The motor voltage can then be controlled by modulating the frequency or duty cycle of the drive.

The DRV777DR integrates a sensing circuit for sensing the phase current for each phase. This information is then fed back to the driver, which allows the system to automatically adjust the phase current to maintain a constant level. Additionally, the system can also detect any over-currents and shut off the power before it reaches the motor.

The DRV777DR features both active and passive protections to help ensure the safe operation of the motor. These features include over current protection, under voltage lockout protection, and thermal shutdown protection. Furthermore, the integrated temperature sensor helps secure the driver against any failures due to high temperatures.

Conclusion

The DRV777DR is a popular motor driver from Sanyo, designed for precise motor control and protection. With its four selection switch, a driver IC with a voltage range of 12 V to 48 V, and a frequency range of 70 to 1000 KHz, the DRV777DR is suitable for driving high precision positioning stages, actuators, and linear motors. Its integrated current sensing and protections helps to ensure safe and reliable operation for a wide range of applications.