CRD44130-FB
CRD44130-FB is 20 W x 2 + 40 W x 1 PWM Amplifier Reference Design manufactured by Cirrus Logic.
Features
Two Full-Bridge Channels, 20 W each CS44600 Spread Spectrum Modulation
(@ 10% THD+N)
One Parallel Full-Bridge Channel, 40 W
Reduces EMI Emissions
Thermal, Over-Current, and Under-Voltage
(@ 10% THD+N)
< 0.3% THD+N at 12 W Thermally Enhanced QFN Package Requires
Protection
> 85% Amplifier Efficiency Can be operated as a Stand-Alone Board
No Heat Sink
Accepts Analog Audio or S/PDIF Digital Audio
Inputs
Onboard FPGA Converts Stereo Inputs to through On-Board Controls or with Windows® patible Graphical User Interface Grounding Arrangements
Demonstrates Remended Layout and
Properly Filtered 2.1 Outputs
120 W Switch Mode Power Supply (SMPS) +5.0 V +18 V +18 V
Channel 1 (L)
Channel 2 (R)
CS44130 (Power Stage)
8Ω 8Ω
Audio Inputs and Control Logic
PCM Clocks & Data
FPGA for Stereo to 2.1 Conversion
I C Host Control
PCM Clocks & Data
CS44600 (PWM Controller)
Channel 3 (LFE)
+18 V
CS44130 (Power Stage)
4Ω http://.cirrus.
Copyright © Cirrus Logic, Inc. 2006 (All Rights Reserved)
AUGUST '06 DS690RD2
General Description
The CRD44130-FB PWM amplifier demonstrates the CS44600 and CS44130 Cirrus Logic’s multi-channel all-digital PWM controller and power stage. This reference design implements a multi-channel amplifier that delivers 20 W per channel into 8 Ω loads and 40 W into a 4 Ω load using a single +18 V supply (at 10% THD+N). The CRD44130-FB es equipped with a 120 W Switch Mode Power Supply (SMPS) for quick demonstration. The CS44130 can operate with power supply levels up to 21 V, delivering up to 32 W into 8 Ω at 10% THD+N or 57 W into 4 Ω when configured as a parallel full-bridge. Additional thermal enhancements may be necessary for continuous power output at voltages greater than +18 V. As shown in the block diagram on the front page, the CS44600 IC takes three stereo digital audio PCM inputs and converts them to PWM outputs. This 64-pin LQFP PWM controller provides an integrated sample...
