Mono/Stereo High-Power Class D Amplifier
Typical Operating Characteristics (continued)
(MAX9736A, PVDD = 12V, MOD = high, spread-spectrum modulation mode, V
erwise noted.)
= V
= 0V, V
= V
= 5V, unless oth-
GND
PGND
SHDN
MUTE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
10
1
10
1
10
1
PVDD = 24V,
SPREAD SPECTRUM,
8Ω LOAD
PVDD = 12V,
FIXED FREQUENCY,
4Ω LOAD
PVDD = 12V,
SPREAD SPECTRUM,
4Ω LOAD
MAX9736
6kHz
6kHz
1kHz
6kHz
1kHz
0.1
0.1
0.1
0.01
20Hz
1kHz
20Hz
20Hz
0.01
0.001
0.01
0.001
0.001
0
0
2
4
6
8
10 12 14 16 18
0
2
4
6
8
10 12 14 16
3
6
9
12
15
18
OUTPUT POWER (W)
OUTPUT POWER (W)
OUTPUT POWER (W)
EFFICIENCY
vs. TOTAL OUTPUT POWER
EFFICIENCY
vs. TOTAL OUTPUT POWER
MAX9736 toc13
MAX9736 toc14
100
10
100
90
80
70
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
0
PVDD = 12V,
SPREAD SPECTRUM,
8Ω LOAD
PVDD = 12V,
FIXED FREQUENCY,
8Ω LOAD
90
80
70
60
50
40
30
20
10
0
9
8
7
6
5
4
3
2
1
0
EFFICIENCY
EFFICIENCY
POWER DISSIPATION
POWER DISSIPATION
0
5
10
15
20
0
2
4
6
8
10 12 14 16 18 20
TOTAL OUTPUT POWER (W)
TOTAL OUTPUT POWER (W)
EFFICIENCY
EFFICIENCY
vs. TOTAL OUTPUT POWER
vs. TOTAL OUTPUT POWER
MAX9736 toc15
MAX9736 toc16
100
90
80
70
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
0
100
90
80
70
60
50
40
30
20
10
0
10
PVDD = 18V,
SPREAD SPECTRUM,
8Ω LOAD
PVDD = 18V,
FIXED FREQUENCY,
8Ω LOAD
9
8
7
6
5
4
3
2
1
0
EFFICIENCY
EFFICIENCY
POWER DISSIPATION
POWER DISSIPATION
0
5
10
15
20
25
30
35
0
5
10
15
20
25
30
35
TOTAL OUTPUT POWER (W)
TOTAL OUTPUT POWER (W)
6
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