TIDUEB8C July   2018  – March 2021 TPS274160

 

  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 Highlighted Products
      1. 2.2.1 LM5165
      2. 2.2.2 TLC59282
      3. 2.2.3 TPS4H160-Q1
      4. 2.2.4 INA253
      5. 2.2.5 TIOL111
    3. 2.3 System Design Theory
      1. 2.3.1 IO-Link PHY
      2. 2.3.2 Current Sink
      3. 2.3.3 Power Supply for L+
      4. 2.3.4 Power Supply
      5. 2.3.5 Pinouts
    4. 2.4 Software Frame Handler
      1. 2.4.1 PRU-ICSS IO-Link Frame-Handler
        1. 2.4.1.1 Performance Advantages and Benefits
        2. 2.4.1.2 Principle of Operation
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
      2. 3.1.2 Software
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
      2. 3.2.2 Test Results
        1. 3.2.2.1 IO-Link Wake-Up Pulse
        2. 3.2.2.2 L+ Turnon Behavior
        3. 3.2.2.3 Current Sink on CQ
        4. 3.2.2.4 Residue Voltage
        5. 3.2.2.5 IO-Link Physical Layer Test Summary
        6. 3.2.2.6 Current Sense on Each Port
        7. 3.2.2.7 TPS4H160 Thermal Behavior
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  10. 5Software Files
  11. 6Related Documentation
    1. 6.1 Trademarks
  12. 7About the Author
  13. 8Revision History

2.3.4 Power Supply

The IO-Link master is powered by 24 V. Since this design uses the AM437x IDK, which is also powered with 24 V, it is possible to power both boards with either one power supply or with two different 24-V supplies. However it is necessary to set the jumpers on the adapter board accordingly.

When the power supply is connected to the IDK and the IO-Link master should be powered through this, J7 on the adapter has to be shorted. The user has to take care that the total current is limited to 0.5 A on all ports. This configuration is not tested and not recommended.

The recommended way is to power the IDK through the adapter board, therefore one 24-V power supply should be connected either to J5 or J8. Jumpers J6 and J9 have to be shorted. To supply the IDK, J7 has to be shorted as well. When a separate power supply is used for the IDK, J7 has to be open.

Table 2-5 Power Jumper Settings
ConfigurationPower SupplyJ6, J9J7
Powered through IDKConnected to IDK onlyOpenShort
Powered through adapterConnected to either J8 or J5ShortShort
Separate power suppliesConnected to IDK and J8 or J5ShortOpen

The TLC59282 device, as well as the TIOL111 device need a 3.3-V supply. To not load the voltage regulator of the IDK, an additional LM5165 device is on the adapter board providing the required voltage. To ensure that the IO-Link master drives no signals to the IDK before all voltages there are stable, the LM5165 device will be turned on by the 3.3 V from the IDK.