Datasheet

6 Maxim Integrated
Mono 3.2W Class D Amplifier
MAX98304
Typical Operating Characteristics (continued)
(V
PVDD
= V
SHDN
= 5.0V, V
PGND
= 0V, A
V
= 6dB, R
L
= J, R
L
connected between OUT+ to OUT-, AC measurement bandwidth 20Hz
to 22kHz, T
A
= +25NC, unless otherwise noted.)
POWER-SUPPLY REJECTION
RATIO vs. SUPPLY VOLTAGE
MAX98304 toc22
SUPPLY VOLTAGE (V)
PSRR (dB)
5.04.54.03.53.0
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
2.5 5.5
f = 1kHz
V
RIPPLE
= 200mV
P-P
STARTUP RESPONSE
MAX98304 toc24
I
SPEAKER
100mA/div
1ms/div
V
SHDN
2V/div
EFFICIENCY vs. OUTPUT POWER
MAX98304 toc19
OUTPUT POWER (W)
EFFICIENCY (%)
1.51.00.5
10
20
30
40
50
60
70
80
90
100
0
0 2.0
V
PVDD
= 3.7V
Z
LOAD
= 8I + 68µH
Z
LOAD
= 4I + 33µH
FREQUENCY (Hz)
10k1k10010 100k
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX98304 toc23
CMRR (dB)
10
20
30
40
50
60
70
80
90
100
0
Z
LOAD
= 8I + 68µH
A
V
= 0dB
A
V
= 6dB
A
V
= 9dB
A
V
= 3dB
A
V
= 12dB
SHUTDOWN RESPONSE
MAX98304 toc25
I
SPEAKER
100mA/div
1ms/div
V
SHDN
2V/div
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX98304 toc20
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.04.54.03.53.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
2.5 5.5
POWER-SUPPLY REJECTION
RATIO vs. FREQUENCY
MAX98304 toc21
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10 100k
V
RIPPLE
= 200mV
P-P
Z
LOAD
= 8I + 68µH