CS4525 datasheet(7/98 Pages) CIRRUS

7 / 98 page

DS726PP1

CS4525

Figure 18.Foldback Process ..................................................................................................................... 40

Figure 19.Popguard Connection Diagram ................................................................................................. 46

Figure 20.2-Channel Full-Bridge PWM Output Delay ...............................................................................50

Figure 21.3-Channel PWM Output Delay .................................................................................................. 50

Figure 22.Typical SYS_CLK Input Clocking Configuration ....................................................................... 54

Figure 23.Hardware Mode PWM Output Delay ......................................................................................... 55

Figure 24.Hardware Mode Digital Signal Flow .......................................................................................... 56

Figure 25.Foldback Process ..................................................................................................................... 57

Figure 26.Output Filter - Half-Bridge ......................................................................................................... 59

Figure 27.Output Filter - Full-Bridge .......................................................................................................... 60

Figure 28.Recommended Unity Gain Input Filter ...................................................................................... 61

Figure 29.Recommended 2 VRMS Input Filter ........................................................................................... 61

Figure 30.I²S Serial Audio Formats ........................................................................................................... 62

Figure 31.Left-Justified Serial Audio Formats ........................................................................................... 62

Figure 32.Right-Justified Serial Audio Formats ......................................................................................... 63

Figure 33.Control Port Timing, I²C Write ................................................................................................... 64

Figure 34.Control Port Timing, I²C Read ................................................................................................... 64

LIST OF TABLES

Table 1. I/O Power Rails ........................................................................................................................... 12

Table 2. Bass Shelving Filter Corner Frequencies .................................................................................... 31

Table 3. Treble Shelving Filter Corner Frequencies ................................................................................. 32

Table 4. Bass Management Cross-Over Frequencies .............................................................................. 35

Table 5. 2-Way Cross-Over Frequencies .................................................................................................. 41

Table 6. Auxiliary Serial Port Data Output ................................................................................................ 43

Table 7. Nominal Switching Frequencies of the Auxiliary Serial Output ................................................... 43

Table 8. PWM Power Output Configurations ............................................................................................ 45

Table 9. Typical Ramp Times for Various VP Voltages ............................................................................46

Table 10. PWM Logic-Level Output Configurations .................................................................................. 49

Table 11. PWM Output Switching Rates and Quantization Levels ........................................................... 51

Table 12. Output of PWM_SIG Outputs .................................................................................................... 52

Table 13. SYS_CLOCK Frequency Selection ........................................................................................... 54

Table 14. Input Source Selection .............................................................................................................. 55

Table 15. Serial Audio Interface Format Selection .................................................................................... 55

Table 16. Thermal Foldback Enable Selection ......................................................................................... 57

Table 17. PWM Output Switching Rates and Quantization Levels ........................................................... 58

Table 18. Low-Pass Filter Components - Half-Bridge ............................................................................... 59

Table 19. DC-Blocking Capacitors Values - Half-Bridge ........................................................................... 59

Table 20. Low-Pass Filter Components - Full-Bridge ............................................................................... 60

Table 21. Power Supply Configuration and Settings ................................................................................. 63

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