TIDUF61 May   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 Block Diagram
    2. 2.2 Highlighted Products
      1. 2.2.1 TLV9002-Q1
      2. 2.2.2 TLV9034-Q1
      3. 2.2.3 TPS7B69-Q1
      4. 2.2.4 SN74HCS08-Q1
      5. 2.2.5 SN74HCS86-Q1
    3. 2.3 System Design Theory
      1. 2.3.1 TIDA-0020069 Operation
        1. 2.3.1.1 Constant Current Source
          1. 2.3.1.1.1 Design Goals
          2. 2.3.1.1.2 Design Description
          3. 2.3.1.1.3 Design Notes
          4. 2.3.1.1.4 Design Steps
        2. 2.3.1.2 Current Sensing
          1. 2.3.1.2.1 Design Goals
          2. 2.3.1.2.2 Design Description
          3. 2.3.1.2.3 Design Steps
        3. 2.3.1.3 Load Connections and Clamps
        4. 2.3.1.4 Modified Window Comparator
        5. 2.3.1.5 Digital Logic Gates
      2. 2.3.2 Status Indication
        1. 2.3.2.1 Normal Operation (Closed Connection) State
        2. 2.3.2.2 Open Connection State
        3. 2.3.2.3 Short-to-Battery State
        4. 2.3.2.4 Short-to-Ground State
  9. 3Hardware, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Normal Operation (Closed Connection) Test Results
      2. 3.3.2 Open Connection Test Results
      3. 3.3.3 Short-to-Battery Test Results
      4. 3.3.4 Short-to-Ground Test Results
      5. 3.3.5 Disable (Shutdown) Test Results
  10. 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
  11. 5Tools and Software
  12. 6Documentation Support
  13. 7Support Resources
  14. 8Trademarks
  15. 9About the Author

3.3 Test Results

A digital multimeter is used to measure the voltages and currents at several test points of the TIDA-020069. The results are compared against the simulated values obtained via TINA-TI simulation of the circuit. The board was configured in 16 different states using PCB header shunt connectors.

Table 3-1 Measured Test Results
CONDITION 5V_LDO TP (V) HVIL-SEND (V) HVIL-RETURN (V) HVIL-SEND LOGIC-HIGHER (V) HVIL-SEND LOGIC-LOWER (V) HVIL-RETURN LOGIC-HIGHER (V) HVIL-RETURN LOGIC-LOWER (V) CS-OUTPUT (V) LOOP CURRENT (mA) POWER SUPPLY CURRENT (mA)
Normal Operation 5.00 3.68 1.69 5.00 5.00 0.00 5.00 2.47 9.97 18
Open Loop 5.00 4.98 1.00 5.00 4.99 0.00 0.00 1.77 0.00 18
Short-to-Battery (Row #1) 5.00 5.26 5.24 5.00 5.00 5.00 5.00 0.33 15.98 20
Short-to-Battery (Row #2) 5.00 5.26 5.25 5.00 5.00 5.00 5.00 0.01 17.23 21
Short-to-Battery (Row #3) 5.00 5.26 5.25 5.00 5.00 5.00 5.00 0.01 18.70 21
Short-to-Battery (Row #4) 5.00 5.26 5.25 5.00 5.00 5.00 5.00 0.01 20.43 22
Short-to-Battery (Row #5) 5.17 5.44 5.44 5.18 5.18 5.18 5.18 0.01 22.53 23
Short-to-Ground (Row #1) 5.28 0.01 1.01 0.00 0.00 0.00 0.00 0.00 44.00 70
Short-to-Ground (Row #2) 5.19 1.55 0.98 0.00 0.00 0.00 0.00 0.00 29.81 56
Short-to-Ground (Row #3) 5.16 2.34 0.94 0.00 5.15 0.00 0.00 0.00 22.77 51
Short-to-Ground (Row #4) 5.18 2.84 0.86 0.00 5.16 0.00 0.00 0.00 18.57 54
Short-to-Ground (Row #5) 5.27 3.23 0.01 0.00 5.23 0.00 0.00 0.00 15.86 62
Shutdown (Normal Operation) 5.00 4.82 4.75 5.00 5.00 5.00 5.00 0.02 0.37 4
Shutdown (Open Loop) 5.00 4.99 0.01 5.00 5.00 0.00 0.00 0.00 0.00 3
Shutdown (Short-to-Battery) 6.49 6.75 6.74 6.49 6.49 6.49 6.49 0.01 -0.53 9
Shutdown (Short-to-Ground) 5.01 2.27 0.00 0.00 5.01 0.00 0.00 0.00 22.13 26