ZHCSQS4A September   2009  – January 2024 TPS5410-Q1

PRODUCTION DATA  

  1.   1
  2. 1特性
  3. 2应用
  4. 3说明
  5. 4静电放电警告
  6. 5Ordering Information
  7. 6Pin Assignments
    1. 6.1 Terminal Functions
  8. 7Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information 
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  9. 8Application Information
    1. 8.1 Functional Block Diagram
    2. 8.2 Detailed Description
      1. 8.2.1  Oscillator Frequency
      2. 8.2.2  Voltage Reference
      3. 8.2.3  Enable (ENA) and Internal Slow Start
      4. 8.2.4  Undervoltage Lockout (UVLO)
      5. 8.2.5  Boost Capacitor (BOOT)
      6. 8.2.6  Output Feedback (VSENSE)
      7. 8.2.7  Internal Compensation
      8. 8.2.8  Voltage Feed Forward
      9. 8.2.9  Pulse-Width-Modulation (PWM) Control
      10. 8.2.10 Overcurrent Liming
      11. 8.2.11 Overvoltage Protection
      12. 8.2.12 Thermal Shutdown
      13. 8.2.13 PCB Layout
      14. 8.2.14 Application Circuits
      15. 8.2.15 Design Procedure
        1. 8.2.15.1 Design Parameters
        2. 8.2.15.2 Switching Frequency
        3. 8.2.15.3 Input Capacitors
        4. 8.2.15.4 Output Filter Components
          1. 8.2.15.4.1 Inductor Selection
          2. 8.2.15.4.2 Capacitor Selection
          3.        40
          4.        41
        5. 8.2.15.5 Output Voltage Setpoint
        6. 8.2.15.6 Boot Capacitor
        7. 8.2.15.7 Catch Diode
        8. 8.2.15.8 Additional Circuits
      16. 8.2.16 Output Filter Capacitor Selection
      17. 8.2.17 External Compensation Network
    3. 8.3 Advanced Information
      1. 8.3.1 Output Voltage Limitations
      2. 8.3.2 Internal Compensation Network
      3. 8.3.3 Thermal Calculations
    4. 8.4 Performance Graphs
    5. 8.5 Performance Graphs
  10. 9Revision History

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8.3.3 Thermal Calculations

The following formulas show how to estimate the device power dissipation under continuous conduction mode operations. They should not be used if the device is working at light loads in the discontinuous conduction mode.

Conduction Loss: Pcon = IOUT2 x Rds(on) x VOUT / VIN

Switching Loss: Psw = VIN x IOUT x 0.01

Quiescent Current Loss: Pq = VIN x 0.01

Total Loss: Ptot = Pcon + Psw + Pq

Given TA => Estimated Junction Temperature: TJ = TA + Rth x Ptot

Given TJMAX = 125°C => Estimated Maximum Ambient Temperature: TAMAX = TJMAX  – Rth x Ptot