
6
Maxim Integrated
Mono 3.2W Class D Amplifier
MAX98304
Typical Operating Characteristics (continued)
(VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 6dB, RL = J, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz
to 22kHz, TA = +25NC, unless otherwise noted.)
POWER-SUPPLY REJECTION
RATIO vs. SUPPLY VOLTAGE
MAX98304
toc22
SUPPLY VOLTAGE (V)
PSRR
(dB)
5.0
4.5
4.0
3.5
3.0
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
2.5
5.5
f = 1kHz
VRIPPLE = 200mVP-P
STARTUP RESPONSE
MAX98304 toc24
ISPEAKER
100mA/div
1ms/div
VSHDN
2V/div
EFFICIENCY vs. OUTPUT POWER
MAX98304
toc19
OUTPUT POWER (W)
EFFICIENCY
(%)
1.5
1.0
0.5
10
20
30
40
50
60
70
80
90
100
0
2.0
VPVDD = 3.7V
ZLOAD = 8I + 68H
ZLOAD = 4I + 33H
FREQUENCY (Hz)
10k
1k
100
10
100k
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX98304
toc23
CMRR
(dB)
10
20
30
40
50
60
70
80
90
100
0
ZLOAD = 8I + 68H
AV = 0dB
AV = 6dB
AV = 9dB
AV = 3dB
AV = 12dB
SHUTDOWN RESPONSE
MAX98304 toc25
ISPEAKER
100mA/div
1ms/div
VSHDN
2V/div
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX98304
toc20
SUPPLY VOLTAGE (V)
SUPPLY
CURRENT
(mA)
5.0
4.5
4.0
3.5
3.0
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)
10k
1k
100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10
100k
VRIPPLE = 200mVP-P
ZLOAD = 8I + 68H