Automobile window automatic control circuit

Car Audio Crystal 3.2*2.5mm 3225 24M (24.000MHZ) 20PF 10PPM 20PPM 30PPM

RF cable can be customized for other specifications

Single chip microcomputer STM32L151CCU6

The two half-bridge intelligent power driver chip BTS 7960B is combined into a full-bridge driver to drive the DC motor to rotate, causing the window to rise or fall. The BTS7960B is a high current half-bridge integrated circuit for motor drive with a P-channel high-side MOSFET, an N-channel low-side MOSFET, and a 1C.P-channel high-side switch to eliminate the charge pump. Demand, thus reducing electromagnetic interference (EMI). The integrated driver IC features logic level input, current diagnostics, slope regulation, dead time generation, and over temperature, over voltage, under voltage, over current, and short circuit protection. The BTS7960B's on-state resistance is typically 16mfl and the drive current is 4.3A, so the window can be safely started even in cold winters. Adjusting the size of the external resistor of the SR pin can adjust the turn-on and turn-off time of the MOS transistor, and has anti-electromagnetic interference function. The 1S pin is a current sense output pin. The INH pin is the enable pin and the IN pin is used to determine which MOSFET is turned on. When lN-1 and INH-1. The high-side MOSFET is turned on and the output is high. When IN=O and INH-1, the low-side MOSFET is turned on and the output is low. The 16-bit microcontroller XC164CS controls. The switching action of the BTS7960B, the same pair of timing monitoring of the system state. Receive appropriate fault feedback signals, and exchange fault information and button control information with the central body controller through the vehicle network (CAN bus), so as to display the fault content on the user interface in time, and control the power window in real time. In order to avoid the current spikes appear when the window motor starts. The soft start function is realized by controlling the pulse width modulation (PWM) signal of the frequency of 20 kHz to the lower arm switch tube.