SLVAFP0 December   2023 LMR51610

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Specifications
    1. 2.1 Input Voltage Range
    2. 2.2 Output Current Range
  6. 3External Component Selection
    1. 3.1 Duty Cycle Calculation
    2. 3.2 Output Voltage Calculation
    3. 3.3 Inductor Selection
    4. 3.4 Input and Output Capacitor
    5. 3.5 Enable Level Shift
    6. 3.6 Output Clamp Diode
  7. 4Evaluation Results
    1. 4.1 Typical Performance
    2. 4.2 Loop Response Bench Verification
  8. 5Conclusion
  9. 6References
  10. 7LMR50410 Design Example
    1. 7.1 LMR50410 Output Current Range
    2. 7.2 LMR50410 Efficiency

3.1 Duty Cycle Calculation

Duty cycle is calculated using Equation 5. The maximum duty cycle is needed at the minimum input voltage. For example, VO=-12V, Dmax = 0.55 at VIN_min = 12V, Dmin = 0. 23 at VIN_max = 48V, Dnorm = 0.38 at VIN_norm = 24V.

Equation 5. GUID-6264E2A6-FA71-4E75-B2A3-8045FBB1278C-low.gif