CRD44130-FB
20 W x 2 + 40 W x 1 PWM Amplifier Reference Design
Features
Two Full-Bridge Channels, 20 W each
(@ 10% THD+N)
One Parallel Full-Bridge Channel, 40 W
(@ 10% THD+N)
< 0.3% THD+N at 12 W
Thermally Enhanced QFN Package Requires
No Heat Sink
Accepts Analog Audio or S/PDIF Digital Audio
Inputs
Onboard FPGA Converts Stereo Inputs to
Properly Filtered 2.1 Outputs
CS44600 Spread Spectrum Modulation
Reduces EMI Emissions
Thermal, Over-Current, and Under-Voltage
Protection
> 85% Amplifier Efficiency
Can be operated as a Stand-Alone Board
through On-Board Controls or with Windows
®
Compatible Graphical User Interface
Demonstrates Recommended Layout and
Grounding Arrangements
120 W Switch Mode Power Supply
(SMPS)
+5.0 V
+18 V
+18 V
Channel 1 (L)
Channel 2 (R)
CS44130
(Power
Stage)
LPF
8
Ω
8
Ω
LPF
Audio
Inputs and
Control
Logic
PCM Clocks
& Data
FPGA for
Stereo to
2.1
Conversion
I
2
C Host Control
PCM Clocks
& Data
CS44600
(PWM
Controller)
Channel 3 (LFE)
+18 V
CS44130
(Power
Stage)
LPF
4
Ω
Copyright
©
Cirrus Logic, Inc. 2006
(All Rights Reserved)
AUGUST '06
DS690RD2
CIRRUS [ CIRRUS LOGIC ]
