Cirrus Logic CRD44800-ST-FB - Manual (Page 2)

CRD44800-ST-FB
2
TABLE OF CONTENTS
1. SCHEMATIC DESCRIPTIONS ................................................................................................. 3
1.1 CRD44800-ST-FB PWM Amplifier ..................................................................................... 3
1.2 CRD44800-ST-FB Driver Board ........................................................................................ 3
1.3 Switched Mode Power Supply ........................................................................................... 3
2. OPERATION INFORMATION ................................................................................................... 4
2.1 Power Supply Ratings ........................................................................................................ 9
2.2 Power Supply Decoupling .................................................................................................. 9
2.3 Electromagnetic Interference (EMI) ................................................................................. 10
2.3.1 Suppression of EMI at the Source ...................................................................... 10
3. SCHEMATICS.......................................................................................................................... 12
4. LAYOUT................................................................................................................................... 19
5. BILL OF MATERIALS ............................................................................................................. 22
6. TYPICAL PERFORMANCE PLOTS ........................................................................................ 24
7. REVISION HISTORY .............................................................................................................. 28
LIST OF FIGURES
Figure 1. Speaker Terminal Configuration ...................................................................................... 5
Figure 2. CS44800 Dialog Tab ........................................................................................................ 7
Figure 3. Advanced Register Debug Tab - CS44800...................................................................... 8
Figure 4. Power and Connectors................................................................................................... 12
Figure 5. CS44800 ........................................................................................................................ 13
Figure 6. Left/Right Back Surround Channels............................................................................... 14
Figure 7. Left/Right Surround Channels ........................................................................................ 15
Figure 8. LFE/Center Channels..................................................................................................... 16
Figure 9. Left/Right Channels........................................................................................................ 17
Figure 10. PSR Feedback ............................................................................................................. 18
Figure 11. Silk Screen Top............................................................................................................ 19
Figure 12. Topside Layer .............................................................................................................. 20
Figure 13. Bottomside Layer ......................................................................................................... 21
Figure 14. Bill of Materials ............................................................................................................. 22
Figure 15. Bill of Materials ............................................................................................................. 23
Figure 16. Frequency Response ................................................................................................... 24
Figure 17. THD+N vs. Frequency at 1 W, 10 W, and 20 W .......................................................... 25
Figure 18. THD+N vs. Power at 1 kHz .......................................................................................... 26
Figure 19. FFT at -60 dBFS and 1 kHz ......................................................................................... 27
LIST OF TABLES
Table 1. Revision History .............................................................................................................. 28