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.)
EFFICIENCY vs. OUTPUT POWER
(MAX98308)
MAX98307 toc25
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
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX98307 toc28
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
2.5
3.0
0
2.5 5.5
V
PVDD
= 3.6V
f
IN
= 1kHz
EFFICIENCY vs. OUTPUT POWER
(MAX98308)
MAX98307 toc26
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
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX98307 toc29
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (nA)
5.04.53.0 3.5 4.0
50
100
150
200
250
300
350
400
0
2.5 5.5
EFFICIENCY vs. OUTPUT POWER
(MAX98308)
MAX98307 toc27
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
POWER-SUPPLY REJECTION
RATIO vs. FREQUENCY
MAX98307 toc30
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
10 100k
V
RIPPLE
= 200mV
P-P