Denon HEOS Amp, Service Manual

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IR4322 (MAIN : IC71,72)
Features
� 2 channel integrated analog input Class D audio
amplifier in a small 7 x 7 mm PQFN44 package
� No mechanical heatsink required
� High peak music power output
� Split or single power supply
� Differential or single-ended input
� Over-current, over-temperature and under
voltage protections with self-reset feature
� Start/stop click noise reduction
�
Clip and Fault reporting outputs
� High noise immunity
� RoHS compliant
Typical Applications
� Home theatre systems
� Docking station audio systems
� PC audio systems
� Musical instruments
� Karaoke amplifiers
� Game consoles
� Powered speaker systems
� General purpose audio power amplifiers
Product Summary
Topology
Half-Bridge,
Full-Bridge
100 W/ 4 Ω
IR4322 Output power
(Typical, THD+N=10%)
100 W/ 2 Ω
*Residual noise
(AES-17, IHF-A, typical)
250 μ Vrms
*THD+N
(1kHz, 1W, 4 Ω , typical)
0.02 %
* In typical application example
Package
7x7mm PQFN44L
Typical Connection
Functional Bock Diagram
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