TIDUF43 August   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Terminology
    2. 1.2 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS1213-Q1 45V, Low IQ, Automotive High-Side Switch Controller With Low-Power Mode and Adjustable Load Wakeup Trigger
      2. 2.3.2 INA296x-Q1 AEC-Q100, –5V to 110V, Bidirectional, 1.1MHz, 8V/μs, Ultra-Precise Current-Sense Amplifier
  9. 3System Design Theory
    1. 3.1 Low-Power Mode Considerations
    2. 3.2 Precharge Circuit Considerations
    3. 3.3 Short-Circuit Protection
    4. 3.4 LM74704-Q1 Enable
    5. 3.5 Headers
      1. 3.5.1 Headers for Configuring INA296B-Q1
      2. 3.5.2 Headers for Configuring TPS1213-Q1
    6. 3.6 Software Considerations
      1. 3.6.1 Fuse Channel Definition
      2. 3.6.2 Software Functions
    7. 3.7 Optional Output TVS Diode
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software
    3. 4.3 Test Setup
    4. 4.4 Test Results
      1. 4.4.1 State Transition
      2. 4.4.2 System IQ in Low-Power Mode
      3. 4.4.3 Precharge Test
      4. 4.4.4 Overcurrent Protection
      5. 4.4.5 PWM Overcurrent
      6. 4.4.6 Short-Circuit Protection
      7. 4.4.7 Thermal Testing
      8. 4.4.8 CISPR-25 Emissions Testing
        1. 4.4.8.1 Conducted Emissions Testing
        2. 4.4.8.2 Radiated Emissions Testing
        3. 4.4.8.3 Summary of Results
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
      3. 5.1.3 PCB Layout Recommendations
        1. 5.1.3.1 Layout Prints
      4. 5.1.4 Altium Project
      5. 5.1.5 Gerber Files
      6. 5.1.6 Assembly Drawings
    2. 5.2 Documentation Support
    3. 5.3 Support Resources
    4. 5.4 Trademarks
  12. 6About the Author

Radiated Emissions Testing

Radiated emissions (RE) testing was achieved with 4 different antennas to capture the full frequency range of CISPR-25. A 12V car battery and LISNs are used for these tests. With the EUT tied to the LISNs, the 4Ω load is wired from the EUT back to the LISN to better replicate an actual application of the EUT. For the tests with monopole, biconical, and horn antenna, tests for low power mode and no load are not shown as these measurements are very similar to the ambient noise floor.

TIDA-020065 RE Setup With a Monopole Antenna: 0.15MHz to 30MHzFigure 4-23 RE Setup With a Monopole Antenna: 0.15MHz to 30MHz
TIDA-020065 RE Ambient Noise Floor: 0.15MHz to 30MHzFigure 4-24 RE Ambient Noise Floor: 0.15MHz to 30MHz
TIDA-020065 RE 3A Load: 0.15MHz to 30MHzFigure 4-25 RE 3A Load: 0.15MHz to 30MHz
TIDA-020065 RE Setup With a Biconical Antenna: 30MHz to 200MHzFigure 4-26 RE Setup With a Biconical Antenna: 30MHz to 200MHz
TIDA-020065 RE Ambient Noise Floor Horizontal Antenna: 30MHz to 200MHzFigure 4-27 RE Ambient Noise Floor Horizontal Antenna: 30MHz to 200MHz
TIDA-020065 RE Ambient Noise Floor Vertical Antenna: 30MHz to 200MHzFigure 4-28 RE Ambient Noise Floor Vertical Antenna: 30MHz to 200MHz
TIDA-020065 RE 3A Load Horizontal Antenna: 30MHz to 200MHzFigure 4-29 RE 3A Load Horizontal Antenna: 30MHz to 200MHz
TIDA-020065 RE 3A Load Vertical Antenna: 30MHz to 200MHzFigure 4-30 RE 3A Load Vertical Antenna: 30MHz to 200MHz
TIDA-020065 RE Setup With a Logarithmic Antenna: 200MHz to 1GHzFigure 4-31 RE Setup With a Logarithmic Antenna: 200MHz to 1GHz
TIDA-020065 RE Ambient Noise Floor Horizontal Antenna: 200MHz to 1GHzFigure 4-32 RE Ambient Noise Floor Horizontal Antenna: 200MHz to 1GHz
TIDA-020065 RE Ambient Noise Floor Vertical Antenna: 200MHz to 1GHzFigure 4-33 RE Ambient Noise Floor Vertical Antenna: 200MHz to 1GHz
TIDA-020065 RE Low Power Mode Horizontal Antenna: 200MHz to 1GHzFigure 4-34 RE Low Power Mode Horizontal Antenna: 200MHz to 1GHz
TIDA-020065 RE Low Power Mode Vertical Antenna: 200MHz to 1GHzFigure 4-35 RE Low Power Mode Vertical Antenna: 200MHz to 1GHz
TIDA-020065 RE No Load Horizontal Antenna: 200MHz to 1GHzFigure 4-36 RE No Load Horizontal Antenna: 200MHz to 1GHz
TIDA-020065 RE No Load Vertical Antenna: 200MHz to 1GHzFigure 4-37 RE No Load Vertical Antenna: 200MHz to 1GHz
TIDA-020065 RE 3A Load Horizontal Antenna: 200MHz to 1GHzFigure 4-38 RE 3A Load Horizontal Antenna: 200MHz to 1GHz
TIDA-020065 RE 3A Load Vertical Antenna: 200MHz to 1GHzFigure 4-39 RE 3A Load Vertical Antenna: 200MHz to 1GHz
TIDA-020065 RE Setup With a Horn Antenna: 1GHz to 5.925GHzFigure 4-40 RE Setup With a Horn Antenna: 1GHz to 5.925GHz
TIDA-020065 RE Ambient Noise Floor Horizontal Antenna: 1GHz to 5.925GHzFigure 4-41 RE Ambient Noise Floor Horizontal Antenna: 1GHz to 5.925GHz
TIDA-020065 RE Ambient Noise Floor Vertical Antenna: 1GHz to 5.925GHzFigure 4-42 RE Ambient Noise Floor Vertical Antenna: 1GHz to 5.925GHz
TIDA-020065 RE 3A Load Horizontal Antenna: 1GHz to 5.925GHzFigure 4-43 RE 3A Load Horizontal Antenna: 1GHz to 5.925GHz
TIDA-020065 RE 3A Load Vertical Antenna: 1GHz to 5.925GHzFigure 4-44 RE 3A Load Vertical Antenna: 1GHz to 5.925GHz