SNVAA70 june   2023 LM5176 , LM5176-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Principle of the TEC
    2. 1.2 Design Specification and Key Challenge
  5. 2Tec Driver Design Using Buck-Boost Controller
    1. 2.1 System Description
    2. 2.2 Block Diagram of TEC Design With LM5176
    3. 2.3 Output Voltage Control of LM5176
  6. 3Test Result
    1. 3.1 TEC Current Versus Output Voltage
    2. 3.2 Current Ripple Measurement Through TEC Element
    3. 3.3 Start-Up
    4. 3.4 Efficiency
  7. 4Summary
  8. 5References

3.4 Efficiency

Figure 3-13 and Figure 3-14 show the efficiency of the design when Vin > Vout and Vin < Vout. The efficiency rises as the voltage increases. Maximum efficiency reaches 99.13% during the test.

GUID-20230508-SS0I-ZDRN-T6QM-MDC3VKD2DJN8-low.svgFigure 3-13 Efficiency (Vin > Vout)
GUID-20230508-SS0I-L7WJ-6TSN-L58GW18J8NSD-low.svgFigure 3-14 Efficiency (Vin < Vout)