TIDUF06 August   2022

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 Key System Specifications
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 PCB and Form Factor
      2. 2.2.2 Power Supply Design
        1. 2.2.2.1 POC Filter
        2. 2.2.2.2 Power Supply Considerations
          1. 2.2.2.2.1 Choosing External Components
          2. 2.2.2.2.2 Choosing the Buck 1 Inductor
          3. 2.2.2.2.3 Choosing the Buck 2 and Buck 3 Inductors
          4. 2.2.2.2.4 Functional Safety
    3. 2.3 Highlighted Products
      1. 2.3.1 DS90UB953-Q1
      2. 2.3.2 TPS650330-Q1
      3. 2.3.3 IMX623
    4. 2.4 System Design Theory
  8. 3Hardware, Testing Requirements, and Test Results
    1. 3.1 Required Hardware
      1. 3.1.1 Hardware Setup
      2. 3.1.2 FPD-Link III I2C Initialization
      3. 3.1.3 IMX623 Initialization
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
        1. 3.2.1.1 Power Supplies Startup
        2. 3.2.1.2 Power Supply Startup – 1.8 V Rail and Serializer PDB Setup
      2. 3.2.2 Test Results
        1. 3.2.2.1 Power Supplies Start Up
        2. 3.2.2.2 Power Supply Output Voltage Ripple
        3. 3.2.2.3 Power Supply Load Currents
        4. 3.2.2.4 I2C Communications
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 PMIC Layout Recommendations
      2. 4.3.2 PCB Layer Stackup
      3. 4.3.3 Serializer Layout Recommendations
      4. 4.3.4 Imager Layout Recommendations
      5. 4.3.5 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  10. 5Related Documentation
  11. 6Trademarks

2.2.1 PCB and Form Factor

The goal of this design is to combine the flexibility of a two-board solution within a compact area of 20 mm x 20 mm. The lens mounting on the imager board and FAKRA connector on the power and serializer board all fit within this area. Figure 2-2 and Figure 2-3 show the base board 3-D PCB views and Figure 2-4 and Figure 2-5 show the imager board 3-D PCB views.

GUID-EABE4B92-BC9A-47BF-8770-5F2FFD5B14A5-low.pngFigure 2-2 3-D PCB Base Board (Top)
GUID-8C545B6B-2FE5-4FAE-B924-8A13437874BF-low.pngFigure 2-3 3-D PCB Base Board (Bottom)
GUID-20220426-SS0I-0LHR-PBWW-J1QPN3VNDBLV-low.pngFigure 2-4 3-D PCB Imager Board (Top)
GUID-20220426-SS0I-VQBR-4SZT-CVM3PCFFVJDL-low.pngFigure 2-5 3-D PCB Imager Board (Bottom)

Figure 2-6 and Figure 2-7 show 3-D PCB views of the assembled boards.

GUID-20220426-SS0I-VPMG-QC1C-BCVQJPP5FMNK-low.pngFigure 2-6 3-D PCB Assembled Boards
(Side View)
GUID-20220426-SS0I-CGLG-JLNL-VQTRX9TVJX3M-low.pngFigure 2-7 3-D PCB Assembled Boards
(Angled View)