Datasheet

MAX98357A/MAX98357B
PCM Input Class D Audio Power Amplifiers
11Maxim Integrated
Typical Operating Characteristics (continued)
(V
DD
= 5V, V
GND
= 0V, GAIN_SLOT = GND (+12dB). BCLK = 3.072MHz, LRCLK = 48kHz, speaker loads (Z
SPK
) connected between
OUTP and OUTN, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25NC.)
0.0
0.5
1.0
1.5
2.0
2.5
2.5 3.0 3.5 4.0 4.5 5.0 5.5
OUTPUT POWER (W)
SUPPLY VOLTAGE (V)
OUTPUT POWER vs. SUPPLY VOLTAGE
Z
SPK
= 8μ + 68µH
THD+N = 1%
THD+N = 10%
toc18
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
OUTPUT POWER (W)
SUPPLY VOLTAGE (V)
OUTPUT POWER vs. SUPPLY VOLTAGE
Z
SPK
= 4μ + 33µH
THD+N = 1%
THD+N = 10%
toc19
0
10
20
30
40
50
60
70
80
90
100
0.0 0.5 1.0 1.5 2.0
EFFICIENCY (%)
OUTPUT POWER (W)
EFFICIENCY vs. OUTPUT POWER
Z
SPK
= 8Ω + 68μ H
V
DD
= 5V
V
DD
= 4.2V
V
DD
= 3.7V
toc21
0
10
20
30
40
50
60
70
80
90
100
0.0001 0.001 0.01 0.1 1
EFFICIENCY (%)
OUTPUT POWER (W)
EFFICIENCY vs. OUTPUT POWER
Z
SPK
= 8Ω + 68μ H
V
DD
= 5V
V
DD
= 4.2V
V
DD
= 3.7V
toc22
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.001 0.01 0.1 1 10
POWER DISSIPATION (W)
OUTPUT POWER (W)
POWER DISSIPATION vs. OUTPUT POWER
Z
SPK
= 8μ + 68µH
V
DD
= 5V
V
DD
= 4.2V
V
DD
= 3.7V
toc23
-3
-2
-1
0
1
2
3
10 100 1000 10000 100000
NORMALIZED GAIN (dB)
FREQUENCY (Hz)
NORMALIZED GAIN vs. FREQUENCY
toc20
0
10
20
30
40
50
60
70
80
90
100
0 1 2 3 4
EFFICIENCY (%)
OUTPUT POWER (W)
EFFICIENCY vs. OUTPUT POWER
Z
SPK
= 4Ω + 33μ H
V
DD
= 5V
V
DD
= 4.2V
V
DD
= 3.7V
toc24
0
10
20
30
40
50
60
70
80
90
100
0.0001 0.001 0.01 0.1 1 10
EFFICIENCY (%)
OUTPUT POWER (W)
EFFICIENCY vs. OUTPUT POWER
Z
SPK
= 4Ω + 33μ H
V
DD
= 5V
V
DD
= 4.2V
V
DD
= 3.7V
toc25
0
0.1
0.2
0.3
0.4
0.5
0.6
0.001 0.01 0.1 1 10
POWER DISSIPATION (W)
OUTPUT POWER (W)
POWER DISSIPATION vs. OUTPUT POWER
Z
SPK
= 4Ω + 33μ H
V
DD
= 5V
V
DD
= 4.2V
V
DD
= 3.7V
toc26