2.4W, Single-Supply, Class G Power Amplifier
Typical Operating Characteristics
(V
= CPV
= SHDN = 3.6V, GND = CPGND = 0V, R
= R = 10kΩ, R
= R
= 10kΩ, R = 100kΩ, C1 = 4.7µF, C2 =
FB- FS
CC
DD
IN+
IN-
FB+
10µF, R = 8Ω; speaker load resistors (R ) are terminated between OUT+ and OUT-, unless otherwise stated; T = T
to T
,
L
L
A
MIN
MAX
unless otherwise noted. Typical values are at T = +25°C.) (Notes 1, 2)
A
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION PLUS
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
NOISE vs. FREQUENCY
10
1
10
1
10
1
V
= 3V
V
= 5V
CC
V
= 3.6V
CC
CC
MAX9730
P
= 0.93W
OUT
P
= 2.08W
P
= 0.69W
OUT
OUT
0.1
0.1
0.1
P
= 0.37W
OUT
P
= 0.33W
OUT
P
= 0.83W
OUT
0.01
0.001
0.01
0.001
0.01
0.001
0.01
0.1
1
10
100
0.01
0.1
1
10
100
0.01
0.1
1
10
100
FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (kHz)
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
10
1
10
1
10
1
V
= 3.6V
V
= 3V
CC
V
= 5V
CC
CC
f
= 10kHz
IN
f = 10kHz
IN
f
= 10kHz
IN
f = 1kHz
IN
f
= 1kHz
IN
f
= 1kHz
IN
0.1
0.1
0.1
0.01
0.001
0.01
0.001
0.01
0.001
f
= 20Hz
IN
f
= 20Hz
f = 20Hz
IN
IN
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
OUTPUT POWER (W)
0
0.5
1.0
1.5
0
0.5
1.0
OUTPUT POWER (W)
1.5
2.0
OUTPUT POWER (W)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
POWER EFFICIENCY
vs. OUTPUT POWER
POWER EFFICIENCY
vs. OUTPUT POWER
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
V
= 200mV
P-P
RIPPLE
V
f
= 3V
= 1kHz
CC
IN
V
= 3.6V
= 1kHz
CC
f
IN
0.01
0.1
1
10
100
0
0.5
1.0
1.5
0
0.5
1.0
1.5
FREQUENCY (kHz)
OUTPUT POWER (W)
OUTPUT POWER (W)
4
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