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ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Audio amplifier 1-channel (mono) Class D TDFN 10 EP (3x3)
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MAX9705
Typical Operating Characteristics (continued)
(V
DD
= 3.3V, SYNC = V
DD
(SSM), differential input, T
A
= +25°C, unless otherwise noted.
Typical Operating Characteristics
for 4Ω
load condition apply to the MAX9705_ETB+T only.)
100
0.01
10 100 10k 100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
0.1
1
10
MAX9705toc10
FREQUENCY (Hz)
THD+N (%)
1k
V
DD
= 3.3V
R
L
= 4
Ω
P
OUT
= 100mW
P
OUT
= 800mW
100
0.01
10 100 10k 100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
0.1
1
10
MAX9705toc11
FREQUENCY (Hz)
THD+N (%)
1k
V
DD
= 5.0V
R
L
= 4
Ω
P
OUT
= 250mW
P
OUT
= 1.75W
100
0.01
10 100 10k 100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
0.1
1
10
MAX9705toc12
FREQUENCY (Hz)
THD+N (%)
1k
V
DD
= 3.3V
R
L
= 8
Ω
P
OUT
= 450mW
FFM
SSM
2.3W, Ultra-Low-EMI, Filterless,
Class D Audio Amplifier
_______________________________________________________________________________________ 5
100
0 0.5 1.51.0 2.0 2.5
10
1
0.1
0.01
0.001
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. COMMON-MODE VOLTAGE
MAX9705toc13
COMMON-MODE VOLTAGE (V)
THD+N (%)
V
DD
= 3.3V to 5V
f
IN
= 1kHz
P
OUT
= 500mW
GAIN = 6dB
R
L
= 8
Ω
0
30
20
10
40
50
60
70
80
90
100
0 0.40.2 0.6 0.8 1.0
EFFICIENCY
vs. OUTPUT POWER
MAX9705toc14
OUTPUT POWER (W)
EFFICIENCY (%)
V
DD
= 3.3V
f
IN
= 1kHz
R
L
= 8
Ω
R
L
= 4
Ω
0
30
20
10
40
50
60
70
80
90
100
0 1.00.5 1.5 2.0 2.5 3.0
EFFICIENCY
vs. OUTPUT POWER
MAX9705toc15
OUTPUT POWER (W)
EFFICIENCY (%)
V
DD
= 5.0V
f
IN
= 1kHz
R
L
= 8
Ω
R
L
= 4
Ω
0
30
20
10
40
50
60
70
80
90
100
2.5 3.53.0 4.0 4.5 5.0 5.5
EFFICIENCY
vs. SUPPLY VOLTAGE
MAX9705toc16
SUPPLY VOLTAGE (V)
EFFICIENCY (%)
f
IN
= 1kHz
THD+N = 1%
R
L
= 8
Ω
R
L
= 4
Ω
0
30
20
10
40
50
60
70
80
90
100
800 12001000 1400 1600 1800 2000
EFFICIENCY
vs. SYNC FREQUENCY
MAX9705toc17
SYNC FREQUENCY (kHz)
EFFICIENCY (%)
V
DD
= 3.3V
f
IN
= 1kHz
THD+N = 1%
R
L
= 8
Ω
R
L
= 4
Ω
0
30
20
10
40
50
60
70
80
90
100
800 12001000 1400 1600 1800 2000
EFFICIENCY
vs. SYNC FREQUENCY
MAX9705toc18
SYNC FREQUENCY (kHz)
EFFICIENCY (%)
V
DD
= 5.0V
f
IN
= 1kHz
THD+N = 1%
R
L
= 8
Ω
R
L
= 4
Ω