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Class D Output Power Estimation Audio Group Applications 1.

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Presentation on theme: "Class D Output Power Estimation Audio Group Applications 1."— Presentation transcript:

1 Class D Output Power Estimation Audio Group Applications 1

2 TI Widgets - 2 http://www.ti.com/general/docs/gencontent.tsp?contentId=45777&DCMP=TI_G adgets&HQS=Other+OT+widgets

3 Output Power Estimation of Class D Amplifier Simple Calculation:

4 APA Circuit Impedances Audio power amplifier circuits includes many other impedances than load (Speaker). The voltage on the load is reduced due to these impedances. Power supply internal impedance, trance impedance, MOSFET turn on resistance and inductor DC resistance must be small compared to load impedance to maintain efficiency and output power.

5 Output Power Estimation of Class D Amplifier Simple Calculation: Accurate Calculation:

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