Datasheet

MAX98355A/MAX98355B
PCM Input Class D Audio Power Amplifiers
12Maxim Integrated
Typical Operating Characteristics (continued)
(V
DD
= 5V, V
G
ND
= 0V, GAIN = V
DD
(+6dB). 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.)
EFFICIENCY vs. OUTPUT POWER
MAX98355A/B toc21
OUTPUT POWER PER CHANNEL (W)
EFFICIENCY (%)
0.90.80.6 0.70.2 0.3 0.4 0.50.1
10
20
30
40
50
60
70
80
90
100
0
0 1.0
V
DD
= 3.7V
GAIN = 12dB
Z
SPK
= 8I + 68µH
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX98355A/B toc18
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
2.5
0
2.5 5.5
GAIN = 12dB
Z
SPK
= 8I + 68µH
THD+N = 10%
THD+N = 1%
EFFICIENCY vs. OUTPUT POWER
MAX98355A/B toc22
OUTPUT POWER PER CHANNEL (W)
EFFICIENCY (%)
1.20.8 1.00.4 0.60.2
10
20
30
40
50
60
70
80
90
100
0
0 1.4
V
DD
= 4.2V
GAIN = 12dB
Z
SPK
= 8I + 68µH
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX98355A/B toc19
SUPPLY VOLTAGE (V)
OUTPUT POWER PER CHANNEL (W)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
2.5 5.5
GAIN = 12dB
Z
SPK
= 4I + 33µH
THD+N = 10%
THD+N = 1%
1.6 1.81.2 1.40.2 0.4 0.6 0.8 1.0
EFFICIENCY vs. OUTPUT POWER
MAX98355A/B toc23
OUTPUT POWER PER CHANNEL (W)
EFFICIENCY (%)
10
20
30
40
50
60
70
80
90
100
0
0 2.0
V
DD
= 5V
GAIN = 12dB
Z
SPK
= 8I + 68µH
NORMALIZED GAIN vs. FREQUENCY
MAX98355A-B toc20
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
10k1k100
-2
-1
0
1
2
3
-3
10 100k
Z
SPK
= 8I + 68µH