Designing Practical High Performance Class D Audio Amplifier

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IRF6665 for class-D audio applications Key Parameters Parameter Min Typ Max Units V(BR)DSS 100 - - V RDS(ON) @ VGS = 10V - 53 62 mOhms Qg - 8.4 13.0 nC Qgd - 2.8 - nC Qsw - 3.4 - nC RG (int) - 1.9 2.9 Ohms VGS(TH) 3 - 5 V • Refer to IRF6665 datasheet for further details www.irf.com
IRF6665 DirectFET ® Evaluation Board Spec: Power Supply ±35.0V Output Power 150W+150W, 4Ω MOSFET IRF6665 Gate Driver IR2011S DirectFET® IRF6665 IR2011S www.irf.com
Page 1 and 2: Designing Practical High Performanc
Page 3 and 4: Chapter 1 Class D Audio Overview ww
Page 5 and 6: Class D Amplifier Feed back Triangl
Page 7 and 8: Major Causes of Imperfection Pulse
Page 9 and 10: Chapter 2 DIGITAL AUDIO MOSFET The
Page 11 and 12: IRF6665 DirectFET ® The best MOSFE
Page 13 and 14: DirectFET ® device technology SO-8
Page 15: Advantages of DirectFET ® : Reduce
Page 19 and 20: THD+N Data Test Conditions: Half-Br
Page 21 and 22: EMI Data @ 1/8 Pout Condition (12.5
Page 23 and 24: Assembling IRF6665 in audio Class-D
Page 25 and 26: Temperature difference (°C) 100 90
Page 27 and 28: Half-Bridge Full-Pak ⇒ S2 G2 D2/S
Page 29 and 30: Disturbance Power Half-Bridge Full-
Page 31 and 32: Conclusion 1 • With IR’s Direct
Page 33 and 34: Protected DIGITAL AUDIO Gate Driver
Page 35 and 36: The discrete dead-time method sets
Page 37 and 38: Overload Protection in Class AB B+
Page 39 and 40: Why Bi-Directional CS? Load Load Lo
Page 41 and 42: What happens in the Short Circuit E
Page 43 and 44: In Negative Half Cycle IRS20124 OC
Page 45 and 46: Tj Estimation in Short Circuit Even
Page 47 and 48: Chapter 4 Design Example www.irf.co
Page 49 and 50: Design: 100W+100W Module • IR’s
Page 51: Conclusion 2 By using IR’s Digita

Designing Practical High Performance Class D Audio Amplifier

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