CS35L32 Datasheet, PDF (45/51 Pages) Cirrus Logic – Boosted Class D Amplifier with Speaker-Protection Monitoring and Flash LED Drivers

8 Typical Performance Plots
CS35L32
8 Typical Performance Plots
8.1 System-Level Efficiency and Power-Consumption Plots
For all system-level efficiency and power-consumption plots, a simulated speaker load (8 + 33 H) is used; the amplifier
PWM outputs (OUT±) contain no EMI filtering. Efficiency calculations are based on RMS power delivered to the load at
the generated frequency and include power consumption of both VA and VP.
100
90
80
70
60
50
40
30
20
10
0
0
VBST = VP, VP = 3.0 V
VBST = VP, VP = 3.6 V
VBST = VP, VP = 4.2 V
200
400
600
800 1000 1200
Output Power (mW)
350
300
250
200
150
100
50
0
0
VBST = VP, VP = 3.0 V
VBST = VP, VP = 3.6 V
VBST = VP, VP = 4.2 V
200
400
600
800 1000 1200
Output Power (mW)
Figure 8-1. Efficiency vs. Output Power—VBST = VP
(VP = 3.0 V, VP = 3.6 V, VP = 4.2 V)
Figure 8-2. VP Supply Current vs. Output Power—VBST = VP
(VP = 3.0 V, VP = 3.6 V, VP = 4.2 V)
100
90
80
70
60
50
40
30
20
10
0
0
VBST = 5 V, VP = 3.0 V
VBST = 5 V, VP = 3.6 V
VBST = 5 V, VP = 4.2 V
200 400 600 800 1000 1200 1400 1600 1800 2000
Output Power (mW)
900
800
700
VBST = 5 V, VP = 3.0 V
VBST = 5 V, VP = 3.6 V
VBST = 5 V, VP = 4.2 V
600
500
400
300
200
100
0
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Output Power (mW)
Figure 8-3. Efficiency vs. Output Power—VBST = 5.0 V
(VP = 3.0 V, VP = 3.6 V, VP = 4.2 V)
Figure 8-4. VP Supply Current vs. Output Power—VBST = 5.0 V
(VP = 3.0 V, VP = 3.6 V, VP = 4.2 V)
DS963F5
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