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Automotive e-mirror module

Optimized integration and functionality with decentralized e-mirror modules

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Overview

Vehicle mirror designs now incorporate complex electronics and multiple functionalities like electronic positioning, mirror folding, memory functions, indicators, and heating. Infineon offers integrated, scalable solutions for efficient and space-saving designs, including SBCs (System Basis Chip), MOTIX? single half-bridge ICs and multi half-bridge, and LITIX? LED driver ICs.

Benefits

  • Support multiple functions
  • Integrated solutions
  • Low energy consumption
  • Compact design
  • Scalability

Block diagram

About

Streamlined automotive e-mirror functions with decentralized control

The rear-view mirror contains several functions that require electronic control. Besides the integration in door ECUs, it also appears as a standalone module with a LIN bus connection to an ECU connected to the CAN bus. The most popular design features are, e.g., electronic mirror positioning and mirror fold including memory functions, side indicators, blind spot indicators, and mirror heating.?

Power-efficient solutions offer optimized mirror features

To keep this complexity manageable in terms of space on the PCB but also in terms of power dissipated, the integration of functions became a key factor for the design. Infineon offers dedicated solutions for supply and communication, as well as for motor control and LED control with a benefit from low power consumption and low quiescent current:

  • OPTIREG? SBC (system basic chip):?Gathers a system supply (LDO, DCDC), a communication interface, diagnosis, switching function, and fail output in one product.
  • LITIX?:?The best-in-class LED driver IC to benefit from the advantages of LEDs while providing full protection to your application.
Configurable and scalable designs to meet a range of applications

An additional challenge for the rear-view mirror design is the increasing number of configurable variants depending on the car manufacturer's platform strategy. To better handle the manifold variants with a single PCB design, scalability within product families has become necessary. Infineon¡¯s power switch ICs?have the most scalable portfolio of high-side switches in the market.

Regarding the design, decentralized mirror module systems require:

  • A supply and communication interface that can be built discrete (voltage regulator + LIN transceiver) or integrated (SBC)
  • A set of scalable single half-bridge switches, multi half-bridges and LED driver ICs with sense, diagnose, and protection functions
  • A set of scalable single- and multi-channel high-side and low-side switches with sense, diagnose, and protection functions

Streamlined automotive e-mirror functions with decentralized control

The rear-view mirror contains several functions that require electronic control. Besides the integration in door ECUs, it also appears as a standalone module with a LIN bus connection to an ECU connected to the CAN bus. The most popular design features are, e.g., electronic mirror positioning and mirror fold including memory functions, side indicators, blind spot indicators, and mirror heating.?

Power-efficient solutions offer optimized mirror features

To keep this complexity manageable in terms of space on the PCB but also in terms of power dissipated, the integration of functions became a key factor for the design. Infineon offers dedicated solutions for supply and communication, as well as for motor control and LED control with a benefit from low power consumption and low quiescent current:

  • OPTIREG? SBC (system basic chip):?Gathers a system supply (LDO, DCDC), a communication interface, diagnosis, switching function, and fail output in one product.
  • LITIX?:?The best-in-class LED driver IC to benefit from the advantages of LEDs while providing full protection to your application.

Configurable and scalable designs to meet a range of applications

An additional challenge for the rear-view mirror design is the increasing number of configurable variants depending on the car manufacturer's platform strategy. To better handle the manifold variants with a single PCB design, scalability within product families has become necessary. Infineon¡¯s power switch ICs?have the most scalable portfolio of high-side switches in the market.

Regarding the design, decentralized mirror module systems require:

  • A supply and communication interface that can be built discrete (voltage regulator + LIN transceiver) or integrated (SBC)
  • A set of scalable single half-bridge switches, multi half-bridges and LED driver ICs with sense, diagnose, and protection functions
  • A set of scalable single- and multi-channel high-side and low-side switches with sense, diagnose, and protection functions

Documents

Documents

Design resources

Partner solutions

Developer community

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