Table of Contents
Advertisement
Quick Links
2 x 11 W CS3511 Digital Amplifier Reference Design
Features
Output Filters Optimized for 8 Ω Loads
Delivers 9 W/Ch into 8 Ω at 10 % THD+N
Delivers 11 W/Ch into 6 Ω at 10 % THD+N
Single-Ended Stereo Analog Inputs
–
Source Impedance Matching Circuit
Demonstrates Recommended 4-Layer Layout
and Grounding Arrangements
Operated by Single +8.5-13.2 V Power Supply
Configured by On-Board Hardware Control
–
Control Mute, Sleep, and Gain Settings
Power and Fault Indicator LEDs
–
Indicates Under-Voltage, Over-Current, or
Over-Temperature Faults
Versatile Binding Post Connectors for Power
Supply and Speaker Outputs
Analog
Input 1
Impedance
Matching
Circuit
Analog
Input 2
http://www.cirrus.com
VP Power
CS3511
DIP Switch
Fault LED
Controls
Copyright © Cirrus Logic, Inc. 2008
(All Rights Reserved)
Description
The CRD3511-Q1 demonstrates the CS3511 high-effi-
ciency Class-D amplifier. This reference design
implements a two-channel amplifier that delivers 9 W
per full-bridge channel into 8 Ω loads using a single
+12 V supply.
Standard RCA phono jacks are provided to easily inter-
face single-ended analog input signals with the
evaluation board. A source impedance matching circuit
on the board allows the full performance of the CS3511
to be tested with any available audio source.
The audio power outputs are routed through an induc-
nd
tor/capacitor 2
order low-pass filter (LPF) to remove
high-frequency components from the output signal, ef-
fectively converting it from digital to analog.
On-board control switches easily change the configura-
tion pins of the CS3511.
ORDERING INFORMATION
CRD3511-Q1
Power
LED
Output
Filter
Output
Filter
CRD3511-Q1
CS3511 Reference Design
Speaker
Binding
Posts
DS845RD2
Ω
8
Ω
8
DEC '08
Advertisement
Table of Contents
Related Manuals for Cirrus Logic CRD3511-Q1
Summary of Contents for Cirrus Logic CRD3511-Q1
- Page 1 2 x 11 W CS3511 Digital Amplifier Reference Design Features Description Output Filters Optimized for 8 Ω Loads The CRD3511-Q1 demonstrates the CS3511 high-effi- ciency Class-D amplifier. This reference design Delivers 9 W/Ch into 8 Ω at 10 % THD+N implements a two-channel amplifier that delivers 9 W per full-bridge channel into 8 Ω...
-
Page 2: Table Of Contents
6. PERFORMANCE PLOTS ........................10 7. THERMAL DE-RATING ........................13 8. REVISION HISTORY ..........................14 LIST OF FIGURES Figure 1.CRD3511-Q1 Schematic ......................6 Figure 2.Component Map ........................... 7 Figure 3.Top-Side Copper Layer ......................... 7 Figure 4.Inner Copper Layer 1 ........................8 Figure 5.Inner Copper Layer 2 ........................ -
Page 3: System Overview
CRD3511-Q1 1. SYSTEM OVERVIEW The CRD3511-Q1 reference design is an excellent means for evaluating the CS3511 2 x 11 W class-D amplifier with integrated protection circuits. A single-ended stereo analog input signal interface is provided; on-board control switches are used for easy modification of the CS3511’s configuration pins. -
Page 4: Speaker Outputs
J5 (OUT1+), J6 (OUT1-), J2 (OUT2+), and J4 (OUT2-). The output filters are op- timized for 8 Ω speaker loads. CS3511 Configuration The CRD3511-Q1 is controlled through the settings on switch S1. The switch can toggle the mute, sleep, and gain settings of the CS3511. See Table 2 for details on each switch setting of S1. -
Page 5: System Connectors And Jumpers
CRD3511-Q1 • Each output of the CS3511 includes “snubbing” components. For example, OUT1+ includes snubber components R13 (5.62 Ω) and C23 (680 pF). These components serve to damp ringing on the switch- ing outputs in the 30-50 MHz range. The snubbing components should be as close as practical to the output pins to maximize their effectiveness. -
Page 6: Crd Schematic
CRD3511-Q1 DS845RD2... -
Page 7: Crd Layout
CRD3511-Q1 5. CRD LAYOUT 2.95'' 2.765'' Figure 2. Component Map Figure 3. Top-Side Copper Layer DS845RD2... -
Page 8: Figure 4.Inner Copper Layer 1
CRD3511-Q1 Figure 4. Inner Copper Layer 1 5VGEN Figure 5. Inner Copper Layer 2 DS845RD2... -
Page 9: Figure 6.Bottom-Side Copper Layer
CRD3511-Q1 Figure 6. Bottom-Side Copper Layer DS845RD2... -
Page 10: Performance Plots
CRD3511-Q1 6. PERFORMANCE PLOTS Test Conditions (unless otherwise specified): T = 25° C; Performance measurements taken with a full-scale 997 Hz sine wave and AES17 20 Hz to 20 kHz measurement filter; GAIN1 = 0, GAIN0 = 1; VP = 12 VDC. -
Page 11: Figure 13.Supply Current Vs. Pout (Rl= 8 W)
CRD3511-Q1 Total Output Power (Watts) Total Output Power (Watts) = 8 Ω) = 6 Ω) Figure 13. Supply Current vs. P Figure 14. Supply Current vs. P T T T T T T Ch 2 to Ch 1 Ch 2 to Ch 1... -
Page 12: Figure 19.Dynamic Range Fft (Rl= 8 W)
CRD3511-Q1 -100 -100 -110 -110 -120 -120 -130 -130 -140 -140 -150 -150 -160 -160 = 8 Ω) = 6 Ω) Figure 19. Dynamic Range FFT (R Figure 20. Dynamic Range FFT (R -100 -100 -110 -110 -120 -120 -130... -
Page 13: Thermal De-Rating
The CRD3511-Q1 is a four-layer PCB with 1 oz. (0.036 mm thick) copper. It is designed to minimize the thermal resistance from the CS3511 to the ambient air. This optimum board configuration and layout allows the CS3511 to produce and sustain its rated 11 W per channel output power in ambient temperatures as high as 65°C without any... -
Page 14: Revision History
TORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES. Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners.
Need help?
Do you have a question about the CRD3511-Q1 and is the answer not in the manual?
Questions and answers