Datasheet

Stereo, High-Power, Class D Amplifiers
MAX98400A/MAX98400B
7
Typical Operating Characteristics
(MAX98400A, V
PVDD
= 18V, V
SHDN
= 5V, LIM_TH = V
S
, TEMPLOCK = unconnected; G1 = GND, G2 = open (gain = 20.1dB), C
IN
=
C
REL
= C1 = C2 = 1FF, typical values are at T
A
= +25NC, unless otherwise noted.)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX98400 toc01
FREQUENCY (kHz)
THD+N (%)
1010.1
0.01
0.1
1
0.001
0.01 100
P
OUT
= 0.5W
V
PVDD
= 12V
8I LOAD
P
OUT
= 4W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX98400 toc02
FREQUENCY (kHz)
THD+N (%)
1010.1
0.01
0.1
1
0.001
0.01 100
P
OUT
= 1W
V
PVDD
= 12V
4I LOAD
P
OUT
= 7W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX98400 toc03
FREQUENCY (kHz)
THD+N (%)
1010.1
0.01
0.1
1
0.001
0.01 100
P
OUT
= 1W
V
PVDD
= 18V
8I LOAD
P
OUT
= 10W
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX98400 toc04
OUTPUT POWER (W)
THD+N (%)
108642
0.01
0.1
1
10
0.001
0 12
f = 6kHz
f = 1kHz
V
PVDD
= 12V
8I LOAD
f = 100Hz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX98400 toc05
OUTPUT POWER (W)
THD+N (%)
20161284
0.01
0.1
1
10
0.001
0 24
f = 6kHz
f = 1kHz
V
PVDD
= 18V
8
I LOAD
f = 100Hz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX98400 toc06
OUTPUT POWER (W)
THD+N (%)
403224168
0.01
0.1
1
10
0.001
0 48
f = 6kHz
f = 1kHz
f = 100Hz
V
PVDD
= 24V
R
L
= 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
14121086420 18
THD+N (%)
0.01
0.1
1
10
0.001
f = 6kHz
f = 1kHz
f = 100Hz
V
PVDD
= 12V
4I LOAD
EFFICIENCY vs. OUTPUT POWER
MAX98400 toc08
TOTAL OUTPUT POWER (W)
EFFICIENCY (%)
181612 144 6 8 102
10
20
30
40
50
60
70
80
90
100
0
0 20
V
PVDD
= 12V,
8I LOAD,
BOTH CHANNELS DRIVEN
EFFICIENCY vs. OUTPUT POWER
MAX98400 toc09
TOTAL OUTPUT POWER (W)
35
3020 2510 1550 40
EFFICIENCY (%)
10
20
30
40
50
60
70
80
90
100
0
V
PVDD
= 18V,
8I LOAD,
BOTH CHANNELS DRIVEN