Datasheet

Automotive Capabilities

LED Interior Lighting Solutions

Automotive Ambient RGB LED

RGB (red, green, blue) LEDs can be used in a variety of automotive lighting

applications. A PIC microcontroller with LED driver capability having at

least three output channels can be used to control a RGB LED, allowing it

to change color and brightness on the go. Such PIC microcontrollers can

be used to set a specific interior color scheme that highlights the unique

ambient look and feel of a car model. RGB LEDs can also be dimmed to

serve as lighting at night without being too bright or intrusive to the driver.

Each RGB LED node is connected to a LIN bus as slave. The LIN master

node controls each slave’s color profile. Each LIN bus contains one master

and up to 15 slaves. More than one LIN bus should be used to control a

large quantity of RGB LEDs.

Typical Applications

■ Footwell lights

■ Cup holder lights

■ Tell tale lights

■ Cluster backlighting

■ Capacitive touch backlighting

■ LCD panel backlighting

Interior Automotive RGB LED Ambient Application Diagram

Microchip Solution Suggested Products Description

Microcontroller

PIC16F Family 8-bit mid-range MCU family with on-chip EEPROM

PIC18F Family 8-bit high-end MCU family with on-chip EEPROM

LIN Transceiver

MCP200X Family Stand-alone LIN transceiver family

MCP202XA Family LIN transceiver family with integrated voltage regulator

MCP2050 LIN transceiver with integrated voltage regulator and windowed watchdog timer

LIN SIP PIC16F1829LIN Integrated, single-package 8-bit MCU, LIN transceiver and voltage regulator

Voltage Regulator MCP179X Family 70 mA, high-voltage linear regulator family

Voltage

Regulator

LIN

Transceiver

EUSART

CCP

PIC

MCU

BAT

Color/Brightness

Red

Green

Blue

Optional Brightnes

Control