![](http://datasheet.mmic.net.cn/Maxim-Integrated-Products/MAX98400AETX-_datasheet_105822/MAX98400AETX-_7.png)
Stereo, High-Power, Class D Amplifiers
MAX98400A/MAX98400B
7
Typical Operating Characteristics
(MAX98400A, VPVDD = 18V, VSHDN = 5V, LIM_TH = VS, TEMPLOCK = unconnected; G1 = GND, G2 = open (gain = 20.1dB), CIN =
CREL = C1 = C2 = 1FF, typical values are at TA = +25NC, unless otherwise noted.)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX98400
toc01
FREQUENCY (kHz)
THD+N
(%)
10
1
0.1
0.01
0.1
1
0.001
0.01
100
POUT = 0.5W
VPVDD = 12V
8I LOAD
POUT = 4W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX98400
toc02
FREQUENCY (kHz)
THD+N
(%)
10
1
0.1
0.01
0.1
1
0.001
0.01
100
POUT = 1W
VPVDD = 12V
4I LOAD
POUT = 7W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX98400
toc03
FREQUENCY (kHz)
THD+N
(%)
10
1
0.1
0.01
0.1
1
0.001
0.01
100
POUT = 1W
VPVDD = 18V
8I LOAD
POUT = 10W
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX98400
toc04
OUTPUT POWER (W)
THD+N
(%)
10
8
6
4
2
0.01
0.1
1
10
0.001
0
12
f = 6kHz
f = 1kHz
VPVDD = 12V
8I LOAD
f = 100Hz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX98400
toc05
OUTPUT POWER (W)
THD+N
(%)
20
16
12
8
4
0.01
0.1
1
10
0.001
0
24
f = 6kHz
f = 1kHz
VPVDD = 18V
8I LOAD
f = 100Hz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX98400
toc06
OUTPUT POWER (W)
THD+N
(%)
40
32
24
16
8
0.01
0.1
1
10
0.001
0
48
f = 6kHz
f = 1kHz
f = 100Hz
VPVDD = 24V
RL = 8I
STOPS BEFORE 10% THD+N
DUE TO THERMAL LIMITING OF
THERMAL FOLDBACK FEATURE
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX98400
toc07
OUTPUT POWER (W)
16
14
12
10
8
6
4
2
0
18
THD+N
(%)
0.01
0.1
1
10
0.001
f = 6kHz
f = 1kHz
f = 100Hz
VPVDD = 12V
4I LOAD
EFFICIENCY vs. OUTPUT POWER
MAX98400
toc08
TOTAL OUTPUT POWER (W)
EFFICIENCY
(%)
18
16
12 14
4
6
8 10
2
10
20
30
40
50
60
70
80
90
100
0
20
VPVDD = 12V,
8I LOAD,
BOTH CHANNELS DRIVEN
EFFICIENCY vs. OUTPUT POWER
MAX98400
toc09
TOTAL OUTPUT POWER (W)
35
30
20
25
10
15
5
0
40
EFFICIENCY
(%)
10
20
30
40
50
60
70
80
90
100
0
VPVDD = 18V,
8I LOAD,
BOTH CHANNELS DRIVEN