CRD4412 Datasheet, PDF (1/15 Pages) Cirrus Logic – 2 x 15 W Digital Power Stage Reference Design

CRD4412
2 x 15 W CS4412 Digital Power Stage Reference Design
Features
 Pre-Configured for Stereo Full-Bridge
Operation
– Delivers 15 W/Ch into 8 Ω at 10 % THD+N
 Easily Configurable for Mono Parallel Full-
Bridge Operation
– Delivers 30 W into 4 Ω at 10 % THD+N
 Directly Connects to CRD4525 Digital Amplifier
Reference Design
– Implements a 2.1 Configuration
 Flexible I/O Provided
– PWM Logic Level Signal Inputs
– CS4412 Error and Warning Signals
 Operates from +9 V to +18 V and +3.3 V
 Demonstrates Recommended Layout and
Grounding Arrangements
 Implements Recommended PWM Output
Filtering
Description
The CRD4412 demonstrates the CS4412 digital ampli-
fier power stage. This reference design is pre-
configured as a two-channel full-bridge power stage
which delivers 15 W per channel into 8 Ω loads using a
single +18 V supply. The design can be easily config-
ured to operate as a single channel parallel full-bridge
power stage capable of delivering 30 W into a 4 Ω load
from an +18 V supply. The CRD4412 can be powered
from +9 V to +18 V
The CRD4412 is designed to operate in conjunction
with the CRD4525. When connected, the combination
implements a 2.1 configuration with the CRD4412 oper-
ating in mono parallel full-bridge mode.
The CRD4412 can also be operated without an at-
tached CRD4525. In this configuration, all input/output
connections are achieved through the CRD4412 inter-
face header.
The PWM audio power outputs are routed through an
inductor/capacitor 2^nd order low-pass filter (LPF) to re-
move high frequency components from the output
signal, effectively converting it from digital to analog.
ORDERING INFORMATION
CRD4412
CS4412 Reference Design
Mono
Parallel
Full-Bridge
Right PWM
Left PWM
Stereo
Full-Bridge
Over Current Error
Under Voltage/Temp Error
Thermal Warning
Power
Reset
CS4412
Output
Filter
Output
Filter
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Copyright © Cirrus Logic, Inc. 2006
(All Rights Reserved)
DECEMBER '06
DS749RD1