Application Fields

The LB11852FV-TLM-E is suitable for automotive electric power steering (EPS), rack type power steering, and other systems that require strong driver control and efficient operation. Some of the features of this IC make it ideal for this type of application. It can power 3-phase PM motors and Brushless DC motors and support current sensing to allow for precise current regulation.

In addition to power steering, this IC can be used in a variety of other applications. These include active suspension systems, drive control for agricultural and construction equipment, power wheelchairs, and forklift torque control. It can be used in motor-driven home appliances such as robotic vacuum cleaners, robotic lawn mowers, and electric curtains as well.

The LB11852FV-TLM-E also provides flexibility with its type of output. It can be used with a 24-step or 48-step sequence, allowing it to be adapted to many different motor control requirements.

Working Principle

The LB11852FV-TLM-E is designed to control powertrain systems with the maximum efficiency and minimum noise. It has several advanced features to ensure precise control by limiting current, optimizing power distribution, and reducing noise.

To control the 3-phase motor, the IC is equipped with a PWM signal generator and a step sequence control circuit. The PWM signal generator creates PWM signals for each of the 3-phase outputs and the step sequence control circuit automatically switches between the different PWM signals to produce a desired output result. The IC also includes current sensors, which can be connected to each of the output pins to measure the current. This data can be used to regulate the current and ensure an efficient operation.

The LB11852FV-TLM-E also includes a protection circuit to protect the motor and IC in case of faults. This protection circuit can detect short-circuits, over-currents, and over-temperatures and will shut off the motor in these cases.

Conclusion

The LB11852FV-TLM-E is a 3-channel powertrain IC with an integrated step motor pre-driver, motor pre-driver, and 3-channel motor driver. It is designed for use in automotive power steering and many other systems. It integrates current sensing, PWM signal generation, output protection, and other functions. The type of output, either 24-step or 48-step sequence, provides flexibility for different motor control needs.