INTERNATIONAL RECTIFIER - THE POWER MANAGEMENT LEADER
Audio Reference Designs
International Rectifier offers a complete class D audio power amplifier design, which contains protection functions and house keeping power supplies for ease of use. This reference design is intended to implement protection circuits and design an optimum PCB layout.

PowIRaudio™ Integrated Amplifier Reference Designs

Number of Audio Channels Load Impedance (Ohm) Output Power per Channel [RMS] Power Supply Reference Design Kit Featured PowIRaudio™ Device
2 4 35W Single Power Supply IRAUDAMP15 IR4311M
IRAUDAMP18 IR4312M
70W Split Power Supply IRAUDAMP16 IR4302M
100W Single Power Supply IRAUDAMP17 IR4302M
IRAUDAMP19 IR4301M
130W Split Power Supply IRAUDAMP12 IR4301M
2 100W Split Power Supply IRAUDAMP22 IR4322M
135W IRAUDAMP21 IR4321M

Discrete Audio Reference Designs

Number of Audio Channels Load Impedance (Ohm) Output Power per Channel [RMS] Reference Design Kit Featured IC Featured MOSFET
1 2 1700W IRAUDAMP9 IRS2092S IRFB4227
2 4 150W IRAUDAMP4A IRS20957S IRF6645
IRAUDAMP5 IRS2092S IRF6645
300W IRAUDAMP7D IRS2092 IRFI4019H-117P
IRAUDAMP7S IRS2092S
IRAUDAMP10 IRS2052M IRF6775M
8 300W IRAUDAMP6 IRS20957S IRF6785M
3 4 150W IRAUDAMP11 IRS2053S IRF6665
4 IRAUDAMP8 IRS2093S IRF6665

Featured Kits
IRAUDAMP22
Two-channel 50W (2 Ohms) Half-Bridge Class-D Audio Power Amplifier
    Output Power
  • 50W x 2 channels (10%THD+N 2Ω load; no heatsink),
  • 100W x 2 channels (10%THD+N 2Ω load; *with heatsink),
    Multiple Protection Features:
  • Over-current protection (OCP), high & low side
  • Over-voltage protection (OVP),
  • Under-voltage protection (UVP), high & low side
  • DC-protection (DCP),
  • Over-temperature protection (OTP)
    PWM Modulator:
  • Self-oscillating half-bridge topology with optional clock synchronization
Featuring: IR4322 PowIRaudio™ integrated Class D IC
IRAUDAMP21
Two-channel 90W (2 Ohms) Half-Bridge Class-D Audio Power Amplifier
    Output Power:
  • 90W x 2 channels (10%THD+N 2Ω load; no heatsink),
  • 135W x 2 channels (10%THD+N 2Ω load; *with heatsink),
    Multiple Protection Features:
  • Over-current protection (OCP), high & low side
  • Over-voltage protection (OVP),
  • Under-voltage protection (UVP), high & low side
  • DC-protection (DCP),
  • Over-temperature protection (OTP)
    PWM Modulator:
  • Self-oscillating half-bridge topology with optional clock synchronization
Featuring: IR4321 PowIRaudio™ integrated Class D IC
IRAUDAMP19
Two-channel 100W (4Ohms) Half-bridge Class-D Audio Power Amplifier with single power supply
  • 100 W x 2 channels, (THD=10%, 1kHz, 4 Ohms)
  • 0.02% THD+N distortion @ 10W, 4 Ohms
  • Residual noise 230 V, IHF-A weighted, AES-17 filter
  • 96% Efficiency @ 75W, 4 Ohms, Class-D Stage
  • OCP, OVP, UVP & OTP
  • Self-oscillating half-bridge topology
  • Featuring IR4301 PowIRaudio™ integrated Class D IC
IRAUDAMP18
Two-channel 35 W (4 Ohms) Half-bridge Class-D Audio Power Amplifier with single power supply
  • 35 W x 2 channels, (THD=10%, 1kHz, 4 Ohms)
  • 0.018% THD+N distortion @ 3W, 4 Ohms
  • Residual noise 180 V, IHF-A weighted, AES-17 filter
  • 96% Efficiency @ 35W, 4 Ohms, Class-D Stage
  • OCP, OVP, UVP & OTP
  • Self-oscillating half-bridge topology
  • Featuring IR4312 PowIRaudio™ integrated Class D IC
IRAUDAMP17
Two-channel 100 W (4 Ohms) Half-bridge Class-D Audio Power Amplifier with single power supply
  • 100 W x 2 channels, (THD=10%, 1kHz, 4 Ohms)
  • 0.008% THD+N distortion @ 30W, 4 Ohms
  • Residual noise 220 V, IHF-A weighted, AES-17 filter
  • 96% Efficiency @ 100W, 4 Ohms, Class-D Stage
  • OCP, OVP, UVP & OTP
  • Self-oscillating half-bridge topology
  • Featuring IR4302 PowIRaudio™ integrated Class D IC
IRAUDAMP16
Two-channel 70 W (4 Ohms) Half-bridge Class-D Audio Power Amplifier
  • 70 W x 2 channels, (THD=10%, 1kHz, 4 Ohms)
  • 0.015% THD+N distortion @ 30W, 4 Ohms
  • Residual noise 250 V, IHF-A weighted, AES-17 filter
  • 96% Efficiency @ 70W, 4 Ohms, Class-D Stage
  • OCP, OVP, UVP,DC protection & OTP
  • Self-oscillating half-bridge topology with optional clock synchronization
  • Featuring IR4302 PowIRaudio™ integrated Class D IC
IRAUDAMP15
Two-channel 35 W (4 Ohms) Half-bridge Class-D Audio Power Amplifier with single power supply
  • 35 W x 2 channels, (THD=10%, 1kHz, 4 Ohms)
  • 0.02% THD+N distortion @ 5W, 4 Ohms
  • Residual noise 250 V, IHF-A weighted, AES-17 filter
  • 96% Efficiency @ 35W, 4 Ohms, Class-D Stage
  • OCP, OVP, UVP & OTP
  • Self-oscillating half-bridge topology
  • Featuring IR4311 PowIRaudio™ integrated Class D IC
IRAUDAMP12
Two-channel 130 W (4 Ohms) Half-bridge Class-D Audio Power Amplifier
  • 130 W x 2 channels, (THD=10%, 1kHz, 4 Ohms)
  • 0.02% THD+N distortion @ 50W, 4 Ohms
  • Residual noise 250 V, IHF-A weighted, AES-17 filter
  • 96% Efficiency @ 130W, 4 Ohms, Class-D Stage
  • OCP, OVP, UVP,DC protection & OTP
  • Self-oscillating half-bridge topology with optional clock synchronization
  • Featuring IR4301 PowIRaudio™ integrated Class D IC
IRAUDPS3
+/-30V 200W Switch Mode Power Supply for Class-D Audio Power Amplifiers
  • 110Vac or 220Vac selectable input voltage range
  • 89% efficiency at low line, 91% efficiency at high line
  • Over current and short circuit protection
  • Small form factor, light weight
  • Featuring IRS27952S resonant half-bridge control IC
IRAUDPS1
Switched Mode Audio Power Supply for Class D Audio Power Amplifiers
  • DC-DC converter from 12V to +/-35V
  • Push-Pull converter
  • Power output scalable from 250W-1000W
  • 90% efficiency
  • Protected for OCP, UVP, OVP, OTP
  • External turn ON/OFF
  • Featuring IR2085 self oscillating gate driver and IRF6648 DirectFET MOSFETs
IRAUDAMP11
Three-channel 120 W Half-bridge
  • 120 W x 3 channels, (THD=1%, 1kHz, 4 Ohms)
  • 0.02% THD+N distortion @ 60W, 4 Ohms
  • Residual noise 220 V, IHF-A weighted, AES-17 filter
  • 90% Efficiency @ 120W, 4 Ohms, Class-D Stage
  • OCP, OVP, UVP & OTP
  • Self-oscillating half-bridge topology with optional clock synchronization
  • Featuring IRS2053M Controller and Gate Driver IC and IRF6665 DirectFET MOSFETs
IRAUDAMP10
Two-channel 300 W (4Ohms) Half-bridge Class-D Audio Power Amplifier
  • 300 W x 2 channels, (THD=1%, 1kHz, 4 Ohms)
  • 0.008% THD+N distortion @ 100W, 4 Ohms
  • Residual noise 220 V, IHF-A weighted, AES-17 filter
  • 90% Efficiency @ 300W, 4 Ohms, Class-D Stage
  • OCP, OVP, UVP & OTP
  • Self-oscillating half-bridge topology with optional clock synchronization
  • Featuring IRS2052M Controller and Gate Driver IC and IRF6775 DirectFET MOSFETs
IRAUDAMP9
Single channel 1700 W (2 Ω) Half-bridge Class-D Audio Power Amplifier
  • 1700 W Single channel (2Ω load THDN=10%, 1kHz)
  • 1% THD+N distortion @ 1200W, 2 Ohms +/-75V
  • Residual noise 290 V, IHF-A weighted, AES-17 filter
  • 94% efficiency @ 1200W, 2 Ohms, Single Channel Driven, Class-D Stage
  • OCP, OVP, UVP, DC protection, HOPS ( High Output peak Shutdown Protection) & OTP
  • Self-oscillating half-bridge topology with optional clock synchronization
  • Featuring IRS2092S Gate Driver ( with external BJT buffering ) and IRFB4227PBF 200V MOSFETs
IRAUDAMP8
Four-channel 120 W Half-bridge Class-D Audio Power Amplifier
  • 120 W x 4 channels, (THD=1%, 1kHz, 4 Ohms)
  • 0.015% THD+N distortion @ 60W, 4 Ohms
  • Residual noise 200 V, IHF-A weighted, AES-17 filter
  • 90% Efficiency @ 120W, 4 Ohms, Class-D Stage
  • OCP, OVP, UVP & OTP
  • Self-oscillating half-bridge topology with optional clock synchronization
  • Featuring IRS2093M Controller and Gate Driver IC and IRF6665 DirectFET MOSFETs
IRAUDAMP7D
Two-channel 250 W Half-bridge Class-D Audio Power Amplifier
  • 250 W x 2 channels, (THD=1%, 1kHz, 4 Ohms)
  • 0.05% THD+N distortion @ 120W, 4 Ohms
  • Residual noise 200 V, IHF-A weighted, AES-17 filter
  • All through-hole components on single layer PCB
  • OCP, OVP, UVP, DC protection & OTP
  • Half bridge/ full bridge selector
  • Featuring IRS2092 Gate Driver IC and IRFI4019H-117P MOSFETs
IRAUDAMP7S
Two-channel 250 W Half-bridge Class-D Audio Power Amplifier
  • 250 W x 2 channels, (THD=1%, 1kHz, 4 Ohms)
  • 0.01% THD+N distortion @ 120W, 4 Ohms
  • Residual noise 200 V, IHF-A weighted, AES-17 filter
  • Single layer PCB
  • OCP, OVP, UVP, DC protection & OTP
  • Half bridge/ full bridge selector
  • Featuring IRS2092S Gate Driver IC and IRFI4019H-117P MOSFETs
IRAUDAMP6
Two-channel 250 W (8 Ohms) Half-bridge Class-D Audio Power Amplifier
  • 250 W x 2 channels (8 Ohms load THD=1%, 1kHZ)
  • 0.005% THD+N distortion @ 125W, 8 Ohms
  • Residual noise 90 V, IHF-A weighted, AES-17 filter
  • 96% efficiency @ 250W, 8 Ohms, Single Channel Driven, Class-D Stage
  • OCP, OVP, UVP, DC protection & OTP
  • Self-oscillating half-bridge topology with optional clock synchronization
  • Featuring IRS20957S Gate Driver and IRF6785 DirectFET MOSFETs
IRAUDAMP5
Two-channel 120 W Half-bridge Class-D Audio Power Amplifier
  • 120W x 2 Channels (THD=1%, 1kHZ)
  • 0.005% THD+N @ 60W, 4 Ohms
  • 170 V Distortion, IHF-A weighted, AES-17 filter
  • 96% Efficiency @ 120W, 4 Ohms, Single Channel Driven, Class-D Stage
  • OCP, OVP, UVP, DC protection & OTP
  • Self-oscillating half-bridge topology with optional clock synchronization
  • Featuring IRS2092S Controller and Gate Driver IC and IRF6645 DirectFET MOSFETs
IRAUDAMP4A
Two-channel 120 W Half-bridge Class-D Audio Power Amplifier
  • 120 W x 2 channels, (THD=1%, 1kHZ)
  • 0.004% THD+N distortion @ 60W, 4 Ohms
  • Residual noise 52 V, IHF-A weighted, AES-17 filter
  • 96% efficiency @ 120W, 4 Ohms, Single Channel Driven, Class-D Stage
  • OCP, OVP, UVP, DC protection & OTP
  • Self-oscillating half-bridge topology with optional clock synchronization
  • Featuring IRS20957S Gate Driver and IRF6645 DirectFET MOSFETs

ARCHIVED KITS
A limited supply of these archived reference designs still may be available. To learn if quantities are available in your area, please click on the reference design part number listed below, then select your region and click on Check Availability.
Reference Design Part Number Description
No Archived Kits for Audio are avialable for purchase at this time
IRAUDAMP4 IRS20955S Two-channel 120 W Half-bridge Class-D Audio Power Amplifier
IRAUDAMP3 IRS20124S Complete 6-channel 120W half-bridge Class D Audio power amplifier
IRAUDAMP1 IR2011S Audio reference design for High Power Class D Audio Power Amplifier

 
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