Cirrus Logic CRD44600-PH-FB - Manual (Page 2)

CRD44600-PH-FB
2 MAR '05 DS633RD1
TABLE OF CONTENTS
1. SYSTEM OVERVIEW ............................................................................................................... 3
1.1 CS44600 PWM Modulator ................................................................................................. 3
1.2 CS4461 PSR Feedback ADC ............................................................................................ 3
1.3 TDA8939 Power Stage ...................................................................................................... 3
1.4 CS8416 Digital Audio Receiver .......................................................................................... 3
1.5 CS5341 Analog to Digital Converter .................................................................................. 3
1.6 Control Port Interface and GUI .......................................................................................... 4
1.7 Unregulated Linear Power Supply ..................................................................................... 4
2. GUI CONTROL ......................................................................................................................... 5
2.1 CS44600 Dialog Tab .......................................................................................................... 5
2.2 Advanced Register Debug Tab .......................................................................................... 6
3. POWER SUPPLY ..................................................................................................................... 8
3.1 Power Supply Ratings ........................................................................................................ 8
3.2 Power Supply Decoupling .................................................................................................. 8
4. ELECTROMAGNETIC INTERFERENCE (EMI) ....................................................................... 9
4.1 Suppression of EMI at the Source ..................................................................................... 9
4.2 EMI Testing ........................................................................................................................ 9
5. CRD44600-PH-FB SCHEMATICS ......................................................................................... 14
6. CRD44600-PH-FB POWER SUPPLY SCHEMATICS ........................................................... 19
7. CRD44600-PH-FB LAYOUT ................................................................................................... 20
8. CRD44600-PH-FB BILL OF MATERIALS ....................................................................... 23
9. TYPICAL PERFORMANCE PLOTS ....................................................................................... 25
10. REVISION HISTORY ............................................................................................................ 30
LIST OF FIGURES
Figure 1. CS44600 Dialog Tab........................................................................................................ 5
Figure 2. Advanced Register Debug Tab - CS44600...................................................................... 6
Figure 3. Advanced Register Debug Tab - CS8416........................................................................ 7
Figure 4. EMI Testing Setup.......................................................................................................... 11
Figure 5. EMI Testing Setup, Close-up ......................................................................................... 11
Figure 6. Radiated EMI Testing Results- 30 MHz to 200 MHz...................................................... 12
Figure 7. Radiated EMI Testing Results- 200 MHz to 1 GHz........................................................ 12
Figure 8. Conducted Power Line Testing Results ......................................................................... 13
Figure 9. Audio Inputs ................................................................................................................... 14
Figure 10. CS44600 ...................................................................................................................... 15
Figure 11. PSR Feedback ............................................................................................................. 16
Figure 12. Left/Right Channels...................................................................................................... 17
Figure 13. Control Port and Power................................................................................................ 18
Figure 14. Power Supply ............................................................................................................... 19
Figure 15. Silk Screen Top............................................................................................................ 20
Figure 16. Topside Layer .............................................................................................................. 21
Figure 17. Bottomside Layer ......................................................................................................... 22
Figure 18. Frequency Response ................................................................................................... 25
Figure 19. THD+N vs. Frequency at 1 W, 10 W, and 50 W .......................................................... 26
Figure 20. THD+N vs. Power at 1 kHz .......................................................................................... 27
Figure 21. FFT at -60 dBFS and 1 kHz ......................................................................................... 28
Figure 22. FFT at -1 dBFS and 1 kHz. Red = PSR Feedback Off. Blue = PSR Feedback On ..... 29
LIST OF TABLES