User's Manual

T-0000-0004-V2.1: Using Mozart II
T-0000-0004-V2.1: Using Mozart II Page: 20 / 24
Detailed mechanical placement information can be found in attached DXF file.
23 Daughterboard Schematic Description
The attached reference device schematic shows a real-life use of the Analog variant of Mozart II,
where the situation is a product that includes Internet Radio, FM, and iPod dock features. The
schematic is split into four functional blocks: a main block, a front block, a connector panel and an
iPod dock. This arrangement will fit most possible designs. See attached PDF schematics for each
block.
23.1 MAIN BLOCK
23.1.1 “AUDIO” SECTION (PAGE 1)
U4 is the analog power amplifier (class D), with the associated filtering for HP outputs. U7 allows
switching between multiple analog sources such as iPod, Line-In and FM (located on the module
itself).
23.1.2 “POWER” SECTION (PAGE 2)
The main block is “hidden” (eg, there is no user-acc
essible part on it). It provides power & module
connector interfacing.
The power & connectors section is quite straightforward. There is a PWM generation of the 5V rail for
USB and iPod charging, and 3.3V for the board logic.