CS35L00_11 Datasheet, PDF (28/34 Pages) Cirrus Logic – 2.8 W Mono Class-D Audio Amplifier with Low Idle Current

CS35L00
4.50
3.5
4.00
3.50
3.00
2200 pF
2.50
1000 pF
2.00
1.50
1.00
470 pF
0.50
No Filter
0.00
2.5
3
3.5
4
4.5
5
5.5
VBATT Supply Voltage (V)
Figure 50. Idle Current Draw vs. VBATT - FHD Mode
R_L = 8 Ω + 33 μH (Note 19)
100%
90%
80%
3.7 V
4.2 V
5.0 V
70%
60%
50%
40%
30%
20%
10%
0%
0
250
500
750
1000
1250
1500
1750
2000
Output Power (mW)
Figure 52. Efficiency vs. Output Power - FHD Mode
R_L = 8 Ω + 33 μH
3.0
R_L = 4 Ω
10% THD+N Ratio
2.5
2.0
R_L = 4 Ω
1% THD+N Ratio
1.5
1.0
R_L = 8 Ω
10% THD+N Ratio
0.5
R_L = 8 Ω
1% THD+N Ratio
0.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VBATT Supply Voltage (V)
Figure 51. Output Power vs. VBATT - FHD Mode
100%
90%
80%
3.7 V 4.2 V
5.0 V
70%
60%
50%
40%
30%
20%
10%
0%
0
500
1000
1500
2000
2500
3000
3500
Output Power (mW)
Figure 53. Efficiency vs. Output Power - FHD Mode
R_L = 4 Ω + 33 μH
450
800
400
4.2 V
350
3.7 V
300
5.0 V
250
200
150
100
50
700
4.2 V
600
3.7 V
500
5.0 V
400
300
200
100
0
0
250
500
750
1000
1250
1500
1750
2000
Output Power (mW)
Figure 54. Supply Current vs. Output Power - FHD Mode
R_L = 8 Ω + 33 μH
0
0
500
1000
1500
2000
2500
3000
3500
Output Power (mW)
Figure 55. Supply Current vs. Output Power - FHD Mode
R_L = 4 Ω + 33 μH
Note:
19. “Idle Current Draw vs. VBATT - FHD Mode” capacitor values refer to C_FILT when configured as the
“CS35L00’s Minimized Optional Output Filtering” shown in Figure 5 on page 17. When VBATT is
below “VBATT Limit for HD/FHD Mode” (VB_LIM), operation is restricted to SD Mode.
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DS906PP1