Designing Practical High Performance Class D Audio Amplifier

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100W x 6 Channels Design Specs: Supply Voltage: ±35V Output Power: 6ch x 100W into 8 ohm Protections: OCP, DC, OTP, OVP IR devices: IRS20124, IRF6665 Dimensions: 295mm x 95mm x 40mm(H) CH-1 CH-2 CH-3 CH-4 CH-5 CH-6 PROTECTION 100W+100W MODULE 100W+100W MODULE 100W+100W MODULE POWER SUPPLY Single layer board www.irf.com
Design: 100W+100W Module • IR’s latest technology allows continuous 100W+100W audio outputs with no heat sink attached. • All the critical current paths are included in the module so that a single layer PC board can be used. • All the tricky functions, such as deadtime generation and over current protection, are included inside the module. • Over temperature protection • Digital <strong>Audio</strong> Direct-FET IRF6665 and Digital <strong>Audio</strong> gate driver IRS20124 placed back to back are a perfect combination to obtain minimal stray inductances. 30mm IRS20124 65mm IRF6665 Direct-FET 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 and 16: Advantages of DirectFET ® : Reduce
Page 17 and 18: IRF6665 DirectFET ® Evaluation Boa
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: Chapter 4 Design Example www.irf.co
Page 51: Conclusion 2 By using IR’s Digita

Designing Practical High Performance Class D Audio Amplifier

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