PAM8404
3W/CH Filterless Stereo Class-D Audio Amplifier
Typical Operating Characteristics (TA=25°C)
QFN 4x4 20-Pin
Efficiency vs Output Power
RL=8Ω, VDD=5V, L =33μH
Efficiency vs Output Power
RL=4Ω, VDD=5V, L =33μH
100
90
80
70
60
50
40
30
20
10
100
90
80
70
60
50
40
30
20
10
0
200 400 600 800 1000 1200 1400 1600 1800
Output Pow er(mW)
0
300 600 900 1200 1500 1800 2100 2400 2700 3000
Output Pow er(mW)
THD+N vs Output Power
RL=8Ω, Gain=23dB, f=1kHz
THD+N vs Output Power
RL=4Ω, Gain=23dB, f=1kHz
30
30
VDD=5V
VDD=5V
10
5
10
5
VDD=3.6V
VDD=3.6V
2
1
2
1
VDD=2.5V
VDD=2.5V
%
%
0.5
0.5
0.2
0.1
0.2
0.1
0.0 5
0.0 5
0.0 2
0.0 1
0.0 2
0.0 1
10m
20m
50m
100m 200m
W
500m
1
2
4
10m
20m
50m
100m 200m
W
500m
1
2
4
THD+N vs Frequency
PO=0.5W, RL=8Ω, CIN=1μF,Gain=23dB
THD+N vs Frequency
PO=0.5W, RL=4Ω, CIN=1μF,Gain=23dB
30
20
30
20
10
5
10
5
2
1
2
1
VDD=3.6V
VDD=3.6V
VDD=5.5V
%
%
0.5
0.5
0.2
0.1
0.2
0.1
0.0 5
0.05
VDD=5V
VDD=5V
VDD=5.5V
0.0 2
0.0 1
0.02
0.01
20
50
100
200
500
Hz
1k
2k
5k
10k 20k
20
50
100
200
500
Hz
1k
2k
5k
10k 20k
Power Analog Microelectronics,Inc
www.poweranalog.com
03/2009 Rev 1.1
7
PAM [ POWER ANALOG MICOELECTRONICS ]
