Datasheet

© 2011 Fairchild Semiconductor www.fairchildsemi.com
FAB3103 • Rev. 1.0.2 6
FAB3103 — 2.3 Watt Class-D Audio Amplifier with Integrated Boost Regulator and Automatic Gain Control
Typical Performance Characteristics
Unless otherwise noted: AGCT = GND, R
L
= 8 + 33µH, f = 1KHz, audio measurement bandwidth 22Hz to 20KHz
(AES17), V
BATT
= 3.6V, T
A
= 25°C, typical external component values.
Figure 3. Quiescent Supply Current
vs. Supply Voltage
Figure 4.
A
-Weighted Output Noise vs. Frequency
Figure 5. Total Harmonic Distortion + Noise
vs. Output Power
Figure 6. Total Harmonic Distortion + Noise
vs. Frequency
Figure 7. Supply Current vs. Output Powe
r
Figure 8. Efficiency vs. Output Powe
r
2
2.5
3
3.5
4
4.5
5
2.5 3 3.5 4 4.5 5 5.5
Supply Current (mA)
Supply Voltage (V)
Inputs AC grounded
-150
-140
-130
-120
-110
-100
-90
-80
02468101214161820
Amplitude (dBV)
Frequency (KHz)
Inputs AC grounded
0.01
0.1
1
10
0.001 0.01 0.1 1 10
THD+N (%)
Output Power (W)
VBATT=4.8V
VBATT=4.2V
VBATT=3.6V
VBATT=2.8V
f = 1KHz
0.001
0.01
0.1
1
10
10 100 1000 10000
THD+N (%)
Frequency (Hz)
Po = 100mW
Po = 1W
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0.0 0.5 1.0 1.5 2.0 2.5
Supply Current (A)
Output Power (W)
VBATT = 4.2V
VBATT = 3.6V
VBATT = 2.8V
f = 1KHz
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10
Efficiency (%)
Output Power (W)
VBATT=4.2V
VBATT=3.6V
VBATT=2.8V
f = 1KHz