SLVAFH4 January   2023 TPS62870 , TPS62870-Q1 , TPS62871 , TPS62871-Q1 , TPS62872 , TPS62872-Q1 , TPS62873 , TPS62873-Q1 , TPS62874-Q1 , TPS62875-Q1 , TPS62876-Q1 , TPS62877-Q1 , TPSM8287A06 , TPSM8287A10 , TPSM8287A12 , TPSM8287A15

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Configurations
  5. 3Measurements
    1. 3.1 Efficiency
    2. 3.2 Input Voltage Ripple
    3. 3.3 Output Voltage Ripple
    4. 3.4 Load Transient
    5. 3.5 Heat Distribution
  6. 4Summary

Efficiency

Figure 3-1 Efficiency of the Single Converter and Dual Converter

Figure 3-1 shows the result of the efficiency measurements of the single and the dual converter implementation. Since in the dual converter implementation two converters are operated in parallel, the efficiency at light load is lower. This is caused by having twice the quiescent current and increased total switching losses. At higher currents the lower RMS currents in the switches dominate the losses. For that reason the efficiency of the dual converter implementation is higher at higher output currents.