TIDUF49 February   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 System Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 DP83RG720S-Q1 (Automotive SPE PHY)
      2. 2.3.2 TPS1HTC30-Q1 (HSS)
      3. 2.3.3 LM5157x-Q1 and LM5158x-Q1 (PSE PoDL Boost Converter)
      4. 2.3.4 LMR38020-Q1 (PD PoDL Buck Converter)
      5. 2.3.5 TPS629210-Q1 (PD 5.0V Rail Buck Converter)
      6. 2.3.6 TPS746-Q1 (PD PHY 3.3V Rail LDO)
      7. 2.3.7 TPS745-Q1 (PSE and PD PHY 1.0V Rail LDO)
  9. 3System Design Theory
    1. 3.1 System Design Consideration for TIDA-020060 (PSE)
      1. 3.1.1 Ethernet PHY
      2. 3.1.2 PHY Power Supply
      3. 3.1.3 PSE Specific PoDL Power Supply
    2. 3.2 System Design Consideration for TIDA-020061 (PD)
    3. 3.3 General Design Consideration for PoDL Coupling Decoupling Network
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test 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
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

4.4 Test Results

This section shows the test results for selected CDN filter solutions.

Table 4-4 Test Results for CDN Filter Solution 2
12V, 680mA 12V, 680mA(1) 24V, 1350mA 24V, 350mA(1) 48V, 1350mA 48V, 205mA(1)

31.6dB

 29.8dB 31.6dB 29.8dB 29.8dB 29.8dB
PASS PASS PASS PASS PASS

PASS
(1) Pulsed current profile
Table 4-5 Test Results for CDN Filter Solution 4
12V, 540mA 12V, 540mA(1) 24V, 540mA 24V, 540mA(1) 48V, 540mA 48V, 540mA(1)
23.8dB 24.6dB 23.8dB 24.6dB — 24.6dB
PASS PASS PASS PASS TBD PASS
(1) Pulsed current profile
Table 4-6 Test Results for CDN Filter Solution 5
12V, 1500mA(1) 24V, 1500mA 48V, 1500mA
23.8dB 23.8dB 23.8dB
PASS PASS PASS
(1) 5m cable length due to power losses on a long cable.