2.4W, Single-Supply, Class G Power Amplifier
MAX9730
Typical Operating Characteristics (continued)
(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
POWER EFFICIENCY
vs. OUTPUT POWER
STARTUP WAVEFORM
SHUTDOWN WAVEFORM
MAX9730 toc12
MAX9730 toc11
70
60
50
40
30
20
10
0
SHDN
5V/div
SHDN
5V/div
OUT+ - OUT-
500mV/div
OUT+ - OUT-
500mV/div
V
= 5V
= 1kHz
CC
f
IN
0
1
2
3
10ms/div
10ms/div
OUTPUT POWER (W)
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
12
10
8
6
4
2
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
OUTPUT POWER
vs. LOAD RESISTANCE
OUTPUT POWER
vs. SUPPLY VOLTAGE
3.0
2.5
2.0
1.5
1.0
0.5
0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
f
P
= 1kHz
IN
AT 1% THD+N
OUT
10% THD+N
V
= 5V
CC
1% THD+N
V
= 3.6V
20
CC
f
= 1kHz
IN
0
40
60
80
100
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
LOAD RESISTANCE (Ω)
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5