Manual

Typical Operating Characteristics (continued)
(V
CC
= CPV
DD
= SHDN = 3.6V, GND = CPGND = 0V, R
IN+
= R
IN-
= 10kΩ, R
FB+
= R
FB-
= 10kΩ, R
FS
= 100kΩ, C1 = 4.7µF, C2 =
10µF, R
L
= 8Ω; speaker load resistors (R
L
) are terminated between OUT+ and OUT-, unless otherwise stated; T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
MAX9730
2.4W, Single-Supply, Class G Power Amplifier
_______________________________________________________________________________________ 5
POWER EFFICIENCY
vs. OUTPUT POWER
MAX9730 toc10
OUTPUT POWER (W)
EFFICIENCY (%)
21
10
20
30
40
50
60
70
0
03
V
CC
= 5V
f
IN
= 1kHz
STARTUP WAVEFORM
MAX9730 toc11
10ms/div
SHDN
5V/div
OUT+ - OUT-
500mV/div
SHUTDOWN WAVEFORM
MAX9730 toc12
10ms/div
SHDN
5V/div
OUT+ - OUT-
500mV/div
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9730 toc13
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.55.04.54.03.53.0
2
4
6
8
10
12
0
2.5 6.0
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX9730 toc14
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (μA)
5.55.04.0 4.53.53.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
2.5 6.0
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9730 toc15
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.55.03.0 3.5 4.0 4.5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
2.5 6.0
10% THD+N
1% THD+N
f
IN
= 1kHz
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9730 toc16
LOAD RESISTANCE (Ω)
OUTPUT POWER (W)
80604020
0.5
1.0
1.5
2.0
2.5
3.0
0
0100
V
CC
= 5V
V
CC
= 3.6V
f
IN
= 1kHz
P
OUT
AT 1% THD+N