The color setting command is sent to the ambient light through the LIN bus of the car central control host, so as to change the color of the ambient light and create a comfortable atmosphere in the car. It can also be used for other colored lights with decorative applications.
The automotive MCU has UART and PWM modules, which can realize LIN communication and PWM color mixing functions. Optional DFN8 package, small size.
The LIN transceiver with integrated LDO is adopted, and the DFN8 package is only 3x3mm, no external LDO is needed, and the volume is reduced, which is more suitable for applications requiring small volume such as ambient lights.
You can use the MCC plug-in of MPLAB X IDE to configure the MCU driver with a graphical interface, and automatically generate a software project, which is simple and convenient to develop and supports online simulation.
The constant current driving mode of the triode is adopted, and the cost is low.
MPLAB X IDE supports MCC graphical generation of peripheral module drivers and LIN communication protocol.
► Product entity diagram
► Showcase photos
► Scheme block diagram
► MPLAB X IDE graphically generates peripheral module drivers and LIN communication protocol
► Core technical advantages
【Introduction to the scheme】The main chip of this scheme:
Use automotive grade MCU PIC16F15313-E/SNVAO,
Three-channel PWM output is used to control the color change of the RGB LED of OSRAM, which can combine 16777216 colors.
ATA663231-GBQW LIN transceiver integrates a 3.3V LDO with a maximum load current of 85mA, which can directly supply power to the MCU.
LRTB GVSG is OSRAM automotive-grade RGB LED, widely used in automotive atmosphere lights, decorative lights and other applications.
[Recommended device model for ambient light program]
LRTB GVSG OSRAM
1. Please design the PCB according to the actual product size and consider heat dissipation. The main heating components: LED lamp beads, resistors, and transistors.
2. Please enable code protection during production: #pragma config CP = ON You can also directly configure CP permission in MCC.
3. It is recommended to turn on the watchdog and add CLRWDT() in the main program;
4. Software source code needs to sign NDA to provide.
► Solution specifications
Input voltage: 5~28V
LED current: 3*20mA
Communication interface: LIN Bus
IC MCU 16BIT 64KB FLASH 80TQFP
IC MCU 16BIT 8KB FLASH 32LQFP
IC MCU 8BIT 80KB FLASH 80LQFP
IC MCU 16BIT 64KB MROM 48LQFP