TLE7185E

Power management integrated circuit (PMIC) drivers and controllers (also known as motor drivers) are a type of integrated circuit used to control the operation of electrical motors. The TLE7185E is one such device, which is used for controlling 3-phase brushless DC (BLDC) motors. This application note will discuss the application field and working principle of the TLE7185E.

Application Field and Usage

The TLE7185E is a power MOSFET driver, which is specially designed to drive three-phase BLDC motors. BLDC motors are commonly used in applications such as automotive powertrain systems, industrial automation, domestic appliances, and HVAC (heating, ventilation and air conditioning) systems. The TLE7185E is particularly suitable for driving three-phase BLDC motors with a maximum phase current of up to 15 amperes.

The TLE7185E features eight protection functions, which provide full protection against overcurrent, overvoltage, short-circuits, undervoltage, and over temperature. It is also designed to operate in a wide temperature range of -40°C to +125°C and comes with integrated circuitry to enable PWM speed control.

Working Principle

The TLE7185E is a three-phase power MOSFET driver with a fully integrated circuit protection. It is based on an H-bridge topology, with each of the three legs of the bridge consisting of an n-channel power MOSFET and a p-channel power MOSFET. The TLE7185E implements an active lowside-current limitation for each of the three legs of the bridge. This active current limitation feature provides enhanced protection by limiting the current even under fault conditions.

The TLE7185E also features a wide range of protection functions, which provide protection against overcurrent, overvoltage, short-circuits, undervoltage, and over temperature. It is also designed to enable PWM speed control, which allows the user to adjust the speed of the motor by adjusting the duty cycle of a PWM signal. The PWM signal can be generated either internally or externally with a microcontroller.

Conclusion

The TLE7185E is a 3-phase power MOSFET driver, specifically designed for controlling BLDC motors. It features eight protection functions and operates in a wide temperature range of -40°C to +125°C. It is suitable for controlling 3-phase BLDC motors with a maximum phase current of up to 15 Amperes. The TLE7185E also implements an active lowside-current limitation feature and allows for PWM speed control.

In conclusion, the TLE7185E is an ideal solution for controlling 3-phase BLDC motors and provides enhanced protection against common fault conditions. It is suitable for a wide range of applications, including automotive powertrain systems, industrial automation, HVAC, and domestic appliances.