TIDUF99 November   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 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TMS320F2800137
      2. 2.3.2 LMG2100R026
      3. 2.3.3 TMCS1127
      4. 2.3.4 LM5164
      5. 2.3.5 LM74610-Q1
      6. 2.3.6 AFE031
      7. 2.3.7 CC1352P7
  9. 3System Design Theory
    1. 3.1 MPPT Operation
    2. 3.2 Power Optimizer Function
      1. 3.2.1 Power Line Communication (PLC)
    3. 3.3 Four-Switch Buck-Boost Converter
    4. 3.4 Output Inductance
    5. 3.5 Input Capacitance
    6. 3.6 Current Sensor
      1. 3.6.1 Current Measurement Resolution
      2. 3.6.2 Current Sensor Power Dissipation
    7. 3.7 Switching Regulator
    8. 3.8 Bypass Circuit
  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
      1. 4.4.1 Short Mode Test Result
      2. 4.4.2 Switching Mode Test Result
      3. 4.4.3 Bypass Circuit Test Results
      4. 4.4.4 PLC Test Results
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

3.6.1 Current Measurement Resolution

The sensitivity of TMCS1127B2A is 50mV/A. The current resolution of the amplifier into a 12-bit ADC is given by:

Equation 7. IRES = (VOUT / (ADCMAX × Sensitivity)) = (3.3V / (4095 × 50mV/A))
IRES = 16.1mA per bit, that is, 1A equals 62.05bit in MCU
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