The window lift fumction can be implemented as part of the door module, or can be controlled by a dedicated ECU. The window lift system receives commands to raise or lower the window, and can have advanced features such as speed control to reduce mechanical binding and pinch detection. A 48V power supply drives the DC motor responsible for window movement. A full-bridge driver translates the PWM signals of the MCU into high-current motor-driving voltages, controlling the MOSFETs and, therefore, the operation of the motor.

In this example block diagram, a single DRV8263-Q1 full-bridge driver or two DRV8163-Q1 half-bridge drivers connect directly to the 48V supply to control the brushed 48V window lift motor. Designers can use TI's junction Temperature Calculator tools to evaluate which option is better based on the current profile for the window lift. [6],[7]

A buck converter produces the supply for the TLIN4029A-Q1, which connects to the vehicle's LIN network, and which survives faults up to ±70V.

The low-drop-out (LDO) voltage regulator supplies 3.3V for the microcontroller (MCU), the logic in the motor drivers, and the Hall-effect sensors which give position feedback.

Note that many of the design characteristics of a window lift are similar to other body applications such as power sunroof.