1
Companion
®
5 Multimedia
Speaker System
Theory of Operation
CONTENTS
Product Description and Overview ................................................................................................2
Power Supplies, Block Diagram ...................................................................................................... 3
Power Supply, VSNUB ......................................................................................................................4
Power Supply, VRAW.........................................................................................................................5
Power Supply 5V and 10V Regulators ............................................................................................ 6
Power Supply 1.2V Regulator .......................................................................................................... 7
Power Supply 3.3V Regulator .......................................................................................................... 8
Sensor and Power Failure Detection .............................................................................................9
USB Controller........................................................................................................................... 10-11
Audio Interface ................................................................................................................................12
Miscellaneous Control ................................................................................................................... 13
Digital Signal Processor ................................................................................................................14
Conversion and Ramp Generation ......................................................................................... 15-16
Audio Path ................................................................................................................................. 17-20
Power Amplifiers ............................................................................................................................. 21
Headphone Amplifier ...................................................................................................................... 22
Block Diagram .................................................................................................................................23
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