SLVAFU0 April   2024 TPS61377

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Analysis of Dual Polarity Voltage Rails Design With Boost Converter
    1. 2.1 Analysis of Factors Affecting Negative Voltage Rail
    2. 2.2 Improvement of Gap Between Negative Voltage Rail and Positive Voltage Rail
  6. 3Boost Converter ± Quick Calculator Design
  7. 4Demo and Test
    1. 4.1 Simulation Results
    2. 4.2 Demo Board Example
  8. 5Summary
  9. 6References

5 Summary

This application note shows the method to eliminate the DC offset issuing using charge pump circuit with traditional boost converter. But the method is not recommended to use in high power rating application because the method needs to select high power rating charge resistor and the method can cause higher power loss, cost, and size. The Boost Converter ± Quick Calculator can be used to evaluate the resistors power rating need to do further design and complete assessment in advance.