27 WCH 立体声无滤波器 类音频功放
CS8212系列典型特征曲线100 90 80 Efficiency(%) Efficiency(%) 70 60 50 40 30 20 10 0 200 400 600 800 1000 1200 1400 1600 1800 Output Power(mW) Figure 4.Efficiency vs Output Power 800 700 Supply Current(mA) 600 Supply Current(mA) 500 400 300 200 100 0 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 VDD=3.6V RL=8Ω L=33uH 800 600 400 200 0 VDD=3.6V RL=4Ω L=33uH IDD is for Both Channels 1000 1200 IDD is for Both Channels RL=8Ω L=33 uH 100 90 80 70 60 50 40 30 20 10 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 Output Power(W) Figure 5.Efficiency vs Output Power 2.4 2.7 3.0 RL=4Ω L=33 uH
VDD=5V RL=8Ω L=33uH
VDD=5V RL=4Ω L=33uH
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 Output Power(W) Figure 7.Supply Current vs Output Power
Output Power(W) Figure 6.Supply Current vs Output Power 1 VDD=5V RL=8Ω Ci=1uH Av=6dB THD+ N (% ) 1 VDD=5V RL=4Ω Ci=1uH Av=6dB
THD+ N (% )
380mW 0.1 775mW
550mW 0.1 1.1W 1.65W
1.16W 0.01 10 0.01 10
100
1000
10000
100000
100
1000
10000
100000
Frequency ( Hz ) Figure 8.THD+N vs Frequency
Frequency ( Hz ) Figure 9.THD+N vs Frequency
Jul,2010 Rev.1.0
27 WCH 立体声无滤波器 类音频功放
CS8212系列
典型特征曲线100 RL=8Ω f=1kHz Av=24dB VDD=2.
7V VDD=3.6V VDD=5V 10 THD+N(%) 100 RL=8Ω f=1kHz Av=6dB VDD=2.7V VDD=3.6V VDD=5V
10 THD+N(%)
1
1
0.1
0.1
0.01 0.01
0.1
1
10
0.01 0.01
0.1
1
10
Output Power(W) Figure 10.THD+N vs Output Power 100 RL=4Ω f=1kHz Av=24dB 10 THD+N(%) VDD=2.7V VDD=3.6V THD+N(%) VDD=5V 1 10 100 RL=4Ω f=1kHz Av=6dB
Output Power(W) Figure 11.THD+N vs Output Power
VDD=2.7V VDD=3.6V VDD=5V
1
0.1
0.1
0.01 0.01
0.1
1
10
0.01 0.01
0.1
1
10
Output Power(W) Figure 12.THD+N vs Output Power -30 -40 -50 PSRR(dB) -60 -70 -80 -90 -100 20 VDD=3.6V VDD=5V Inputs AC Grounded Ri=4Ω Ci=1uF Av=6dB PSRR(dB) -30 -40 -50 -60 -70 -80 -90 -100 20 VDD=3.6V
Output Power(W) Figure 13.THD+N vs Output Power
Inputs AC Grounded Ri=8Ω Ci=1uF Av=6dB
VDD=2.7V
VDD=2.7V
VDD=5V
100
1K
10K 20
100
1K Frequency(Hz)
10K
20
Frequency(Hz) Figure 14.PSRR vs Frequency
Figure 15.PSRR vs Frequency
Jul,2010 Rev.1.0
27 WCH 立体声无滤波器 类音频功放
CS8212系列
典型特征曲线
-50 V IC=1Vpp R L=8Ω Av=6dB
-55
CMRR(dB)
-60
-65
VDD=2.7V
VDD=3.6V
-70 VDD=5V -75 20 100 1k Frequency(Hz) Figure 16.CMRR vs Frequency Figure 17.FCC Level 10k 20k
Jul,2010 Rev.1.0
27 WCH 立体声无滤波器 类音频功放
Jul,2010Rev.1.0
