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Bluetooth Audio Amplifier BoosterPack

Other Parts Discussed in Thread: TAS5613, TAS5611

Youtube Video:

http://youtu.be/9X-E9GXSX0c

The Bluetooth Audio Amplifier Boosterpack has many uses and has a wide target
audience.  The original project idea was to give tubers a way to make their own
DIY cooler stereo.  Currently, a few companies offer prebuilt coolers with
speakers, but none offer kits that are designed for the DIY'er and none offer
bluetooth connectivity.  Uses aren't limited to coolers as this board can be
used to provide music anywhere there is 12V.  In fact many pedicab drivers have
expressed interest in a board like this.

The board contains two main subsystems: a 4 phase boost converter, and a 300W
Class D amplifier.  The multiphase boost converter which is based on a TI
reference design is used to pump up the 12V from a lawnmower or car battery to
24V which is used as the main supply for the amplifier.  The amplifier is
implemented using a TAS5613.  The TAS5613 is a 300W Total Stereo class D
amplifier.  Becuase of the switching nature of this amplifier it is very
efficient and perfectly suited for the battery powered applications this board
is intended for.

The LaunchPad in this design is used for control of the bluetooth audio module.
Because of time contraints, I've implemented this board in a very simply fashion
which does not show off all that the LaunchPad is capable of, but with more time
for development this could certainly be improved.  Future improvements would be
using one C2000 LaunchPad to control the boost converter and replacing the Class
D amplifier chip with another C2000 LaunchPad and a discrete power stage to implement
a Class D amplifier.  Additionally a TI bluetooth audio solution could be
integrated with this board with some additional resources.

As implemented current BOM cost is right around $60, but the board is over
designed.  A production version of this board would easily hit the $40 mark.

Schematic:

2625.BT_Amp.pdf

Board:

1184.BT_Amp_brd.pdf

BOM:

0841.BT_AMP_BOM.xls

Standard Disclaimer:

This design is a work in progress, it is not perfect and there are probably flaws in it I have yet to find.  Should the design be put into production much more additional work will be done to ensure a quality BoosterPack that rocks...literally!

Vote for me!