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Head unit & digital cockpit

Automotive head unit

Products and reference designs
Block diagram

Automotive head unit

Block diagram

Overview

Automotive head units with remote displays typically have the infotainment features divided into multiple systems.  This makes the head unit more configurable by the OEM allowing for features to be added or removed for different vehicle models. Our integrated circuits and reference designs offer solutions that allow remote inter-connectivity of these while addressing reduced system external machine interface (EMI).

Block diagram

Find products and reference designs for your system.

Automotive head unit

Digital Cameras DigitalCameras Analog Camera AnalogCamera Low VIN Boost Low VIN Boost RGB / CSI-2 RGB / CSI-2 I2S / MOST / Analog I2S / MOST / Analog External Amplifier ExternalAmplifier I2C I2C I2S / MOST / Analog I2S / MOST / Analog Power Power PoC PoC Low VIN Boost Low VIN Boost VBAT_RBP VBAT_RBP Vehicle CAN Bus Vehicle CAN Bus VBAT VBAT VBAT_RBP VBAT_RBP Controls to AP’s power supplies Controls to AP’s power supplies Low voltage system power rails Low voltage system power rails GPIO GPIO Vehicle CAN bus Vehicle CAN bus I2C/SPI I2C/SPI Vehicle LIN bus Vehicle LIN bus Off-battery power Off-battery power Wide VIN UV/OV voltage supervisor Wide VIN UV/OV voltage supervisor Wide VIN Buck Wide VIN Buck Wide VIN switch Wide VINswitch Wide VIN LDO Wide VIN LDO Wide VIN boost Wide VIN boost Reverse battery protection Reverse battery protection Head unit system power Head unit system power Mid/low VIN boost Mid/low VIN boost Low VIN high-side switch Low VIN high-side switch Low-cost, ease-of-use voltage supervisor Low-cost, ease-of-use voltage supervisor Mid/low VIN buck Mid/low VIN buck Mid/low VIN LDO Mid/low VIN LDO Clocking Clocking Clock generator Clock generator Clock buffers Clock buffers Vehicle CAN Bus Vehicle CAN Bus OBD OBD SDIO/ UART/ USB SDIO/ UART/ USB USB/ULPI/SPI USB/ULPI/SPI Debug console Debug console I2C/ SPI I2C/ SPI SDIO/ UART/ USB SDIO/ UART/ USB USB/ ULPI/ SPI USB/ ULPI/ SPI Applications processor Applications processor Digital logic Digital logic Low VIN PMIC Low VIN PMIC Low VIN buck Low VIN buck CAN FD transceiver CAN FD transceiver MPU MPU Memory subsystem Memory subsystem DSP DSP Video accelerator Video accelerator Comm. I/O Comm. I/O Ethernet PHY EthernetPHY OR OR ESD protection ESD protection ESD protection ESD protection Voltage translator Voltage translator Applications processor (AP) Applications processor (AP) RS-232 transceiver RS-232 transceiver ESD protection ESD protection Multi-channel voltage supervisor Multi-channel voltage supervisor Non-volatile memory Non-volatile memory DDR memory termination DDR memory termination DDR memory DDR memory Voltage supervisor +watchdog Voltage supervisor +watchdog Display bridge Display bridge Digital logic & voltage translation Digital logic &voltage translation Digital logic Digital logic Voltage translator Voltage translator I2C MUX/ switch I2C MUX/switch Analog MUX/switch Analog MUX/switch USB SDP USB SDP USB CDP USB CDP VBAT_RBP VBAT_RBP RGB/OpenLDI/LVDS RGB/OpenLDI/LVDS External media & smartphone interface External media & smartphone interface ESD protection ESD protection Voltage translator Voltage translator USB hub USB hub ESD protection ESD protection ESD protection ESD protection USB PHY USB PHY USB charge controller USB charge controller USB power switch USB power switch USB redriver USB redriver Wireless connectivity & navigation Wireless connectivity & navigation NFC transponder NFC transponder Antenna LDO Antenna LDO Wi-Fi/Bluetooth/BLE module Wi-Fi/Bluetooth/BLE module ESD protection ESD protection GPS modem module GPS modem module Low IQ, high PSRR LDO Low IQ, high PSRR LDO Display support & backlight control Display support & backlight control Ambient light sensor Ambient light sensor ESD protection ESD protection LCD bias supply LCD bias supply Gamma buffer Gamma buffer Display module Display module LCD panel LCD panel Backlight LED driver Backlight LED driver Temperature sensor Temperature sensor OR OR Op amp Opamp System boot & monitoring System boot & monitoring ESD protection ESD protection CAN transceiver CAN transceiver Vehicle interface processor (VIP) MCU Vehicleinterfaceprocessor(VIP)MCU Voltage rails sequencer Voltage rails sequencer Low IQ voltage supervisor Low IQ voltage supervisor Mid VIN current sense Mid VIN current sense Multi-channel SAR ADC Multi-channel SAR ADC Voltage reference Voltage reference I2C I2C Temperature sensor Temperature sensor Real-time clock (RTC) Real-time clock (RTC) Accelerometer Accelerometer Gyro Gyro ESD protection ESD protection LIN transceiver LIN transceiver Comparator Comparator ANC/ hands-free ANC/ hands-free Audio op amp Audioop amp Audio channel Audio channel Voltage translator Voltagetranslator Line driver Linedriver Audio op amp Audioop amp Audio op amp Audioop amp ESD protection ESD protection Class D/AB amp ClassD/ABamp Short-to-battery/ESD protection Short-to-battery/ESD protection Audio ADC AudioADC Audio DAC AudioDAC Audio inputs mUX Audioinputs mUX Short-to-battery/ESD protection Short-to-battery/ESD protection Audio CODEC Audio CODEC Radio tuner Radio tuner Digital radio tuner Digital radio tuner High PSRR LDO High PSRRLDO Radio DSP Radio DSP AM/FM/HD/ DAB/DMB tuners AM/FM/HD/DAB/DMB tuners Antenna LDO Antenna LDO Short-to-battery/ESD protection Short-to-battery/ESD protection Audio ADC AudioADC Audio DAC AudioDAC Camera interface Camera interface Mid VIN high-side switch Mid VIN high-side switch AND/OR AND/OR Mid VIN high-side switch Mid VIN high-side switch Deserializer Deserializer Video ADC Video ADC Video amp Video amp High-speed LVDS switch High-speed LVDS switch Short-to-battery/ESD protection Short-to-battery/ESD protection CAN transceiver CAN transceiver Head unit user interface Head unit user interface ESD protection ESD protection ESD protection ESD protection ESD protection ESD protection o o o o o o I/O expander I/O expander Touch controller Touch controller Knob position sensor Knob position sensor LED driver LED driver Haptic driver Haptic driver I2C I2C

Technical documentation

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Type Title Date
Application note EMI Reduction Technique, Dual Random Spread Spectrum (Rev. A) 31 Oct 2022
Application note Automotive Diagnostics Using TAS2505-Q1 (Rev. C) PDF | HTML 29 Jun 2022
Technical article How to simplify your embedded edge AI application development PDF | HTML 29 Aug 2023
Technical article Automotive audio from the inside out: more channels, more power, more applications PDF | HTML 28 Jul 2023
Circuit design Non-inverting microphone pre-amplifier circuit (Rev. A) PDF | HTML 26 Sep 2024
Application note PCM6xx0-Q1 Use-Case Scenarios in Automotive Audio Applications (Rev. A) PDF | HTML 26 May 2022
White paper Powering automotive displays to create interactive driving experiences 26 Jan 2018
Application note Sending Power Over Coax in FPD-Link Designs (Rev. A) PDF | HTML 25 Jan 2024
Technical article Don’t let the name fool you – a passive media hub is an active part of your drivin PDF | HTML 23 Jul 2023
Application brief Active Filtering in Automotive Audio Applications (Rev. A) 23 Aug 2019
Application brief Using Photodiode Amplifiers for Ambient Light Sensing in Automotive Displays (Rev. A) 23 Aug 2019
Application note EMI 감소 기법, 듀얼 랜덤 확산 스펙트럼 (Rev. A) PDF | HTML 21 Nov 2022
Selection guide Automotive Infotainment EE Buck Converter/Controller Selection Guide (Rev. B) 21 May 2021
Application note Common Applications of Wide VIN Overvoltage and Undervoltage Supervisors PDF | HTML 19 Sep 2023
White paper A Primer on USB Type-C and Power Delivery Applications and Requirements (Rev. B) PDF | HTML 19 May 2022
Technical article How to save space and BOM costs by sharing microphones across automotive subsystem PDF | HTML 18 Jul 2023
User guide Single-Supply Electret Microphone Preamplifier Reference Design 18 Feb 2015
White paper Automotive Audio Design Considerations to Minimize Amplifier Size & Thermal Load 15 Oct 2019
White paper Designing a Power Supply for a Safety MCU to Meet Functional Safety ASIL B PDF | HTML 15 Nov 2023
White paper Designing infotainment systems that are interactive not distractive 15 Mar 2019
Technical article What are the advantages of an automotive temperature sensor IC compared to an NTC? PDF | HTML 15 Jun 2023
Technical article 3 ways to drive multiple displays in an integrated digital cockpit with FPD-Link I PDF | HTML 14 Jun 2023
Technical article There are more ways than you think to reduce conducted EMI PDF | HTML 14 Aug 2023
Technical article Powering infotainment systems of the future PDF | HTML 13 Jun 2023
Technical article Why you should use a Class-D audio amplifier in your automotive infotainment syste PDF | HTML 11 Sep 2023
Application note Basics of Ideal Diodes (Rev. B) PDF | HTML 11 May 2022
Application note Implementing Voltage References and Supervisors Into Your Traction Inverter Desi 11 May 2022
Application note Achieving Low IQ Voltage Supervision in Automotive, Wide-Vin Applications 11 May 2022
Application note Low Voltage Translation for SPI, UART, RGMII, JTAG Interfaces (Rev. B) PDF | HTML 11 May 2022
Application brief 12-V Battery Monitoring in an Automotive Module (Rev. A) PDF | HTML 10 May 2022
Technical article Optimizing eAVB for automotive applications using clock generators PDF | HTML 09 Jun 2023
Technical article Lighting up automotive displays with a transimpedance configuration PDF | HTML 07 Sep 2023
Technical article Securing the Scene PDF | HTML 06 Sep 2023
Technical article Concerned about transitioning from Class-AB to a Class-D? Well, you shouldn’t be. PDF | HTML 01 Aug 2023

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