Datasheet

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MAX98307/MAX98308
3.3W Mono Class DG Multilevel Audio Amplifier
Typical Operating Characteristics (continued)
(V
PVDD
= V
CC
= V
SHDN
= 3.6V, V
PGND
= V
GND
= 0V, Z
L
= 8ω + 68FH between OUT+ and OUT-, A
V
= 14.5dB (MAX98307 R
IN+
=
R
IN-
= 10kω, R
FB+
= R
FB-
= 20kω), C
IN+
= C
IN-
= 0.33µF, AC measurement bandwidth 20Hz to 20kHz.)
OUTPUT POWER vs. SUPPLY VOLTAGE
(MAX98307)
MAX98307 toc19
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.04.63.0 3.4 3.8 4.2
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
2.6 5.4
THD+N = 10%
THD+N = 1%
f
IN
= 1kHz
EFFICIENCY vs. OUTPUT POWER
(MAX98307)
MAX98307 toc22
OUTPUT POWER (W)
EFFICIENCY (%)
1.00.80.60.40.2
10
20
30
40
50
60
70
80
90
0
0 1.2
V
PVDD
= 3.6V
f
IN
= 1kHz
OUTPUT POWER vs. SUPPLY VOLTAGE
(MAX98308)
MAX98307 toc20
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.04.64.23.83.43.0
0.5
1.0
1.5
2.0
3.0
2.5
3.5
0
2.6 5.4
f
IN
= 1kHz
THD+N = 1%
THD+N = 10%
THERMALLY LIMITED
EFFICIENCY vs. OUTPUT POWER
(MAX98307)
MAX98307 toc23
OUTPUT POWER (W)
EFFICIENCY (%)
10
20
30
40
50
60
70
80
90
0
V
PVDD
= 4.2V
f
IN
= 1kHz
1.41.20.8 1.00.4 0.60.20 1.6
GAIN vs. FREQUENCY
(MAX98308)
MAX98307 toc21
FREQUENCY (kHz)
AMPLITUDE (dB)
10k1k100
-10
0
10
20
30
-20
10 100k
GAIN = UNCONNECTED
GAIN = 100kI TO V
PVDD
GAIN = PGND
GAIN = V
PVDD
GAIN = 100kI TO PGND
EFFICIENCY vs. OUTPUT POWER
(MAX98307)
MAX98307 toc24
OUTPUT POWER (W)
EFFICIENCY (%)
10
20
30
40
50
60
70
80
90
0
V
PVDD
= 5V
f
IN
= 1kHz
2.01.51.00.50 2.5