Datasheet

Stereo, High-Power, Class D Amplifiers
MAX98400A/MAX98400B
8
Typical Operating Characteristics (continued)
(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.)
MAX98400 toc10
TOTAL OUTPUT POWER (W)
50
403020100 60
EFFICIENCY vs. OUTPUT POWER
EFFICIENCY (%)
10
20
30
40
50
60
70
80
90
100
0
V
PVDD
= 24V,
8I LOAD,
BOTH CHANNELS DRIVEN
MAX98400 toc11
TOTAL OUTPUT POWER (W)
30
20100 40
EFFICIENCY vs. OUTPUT POWER
EFFICIENCY (%)
10
20
30
40
50
60
70
80
90
100
0
V
PVDD
= 12V,
4I LOAD,
BOTH CHANNELS DRIVEN
MAXIMUM OUTPUT POWER vs. SUPPLY VOLTAGE
(WITH THERMAL SHUTDOWN)
MAX98400 toc12
SUPPLY VOLTAGE (V)
MAXIMUM OUTPUT POWER (W)
24201612
10
20
30
40
50
60
70
80
90
100
0
8 28
8I LOAD, BOTH
CHANNELS ARE DRIVEN
10% THD+N
1% THD+N
MAXIMUM OUTPUT POWER vs. SUPPLY VOLTAGE
(WITH THERMAL SHUTDOWN)
MAX98400 toc13
SUPPLY VOLTAGE (V)
MAXIMUM OUTPUT POWER (W)
141210
10
20
30
40
50
60
0
8 16
10% THD+N
1% THD+N
4I LOAD, BOTH CHANNELS ARE DRIVEN
OUTPUT POWER vs. LOAD
MAX98400 toc14
LOAD (I)
P
OUT
(W)
908010 20 30 50 6040 70
5
10
15
20
25
30
35
40
0
0 100
V
PVDD
= 12V
10% THD+N
1% THD+N
OUTPUT POWER vs. LOAD
MAX98400 toc15
LOAD (I)
P
OUT
(W)
908060 7020 30 40 5010
5
10
15
20
25
30
35
40
45
50
0
0 100
10% THD+N
1% THD+N
V
PVDD
= 18V
OUTPUT POWER vs. LOAD
MAX98400 toc16
LOAD (I)
P
OUT
(W)
908010 20 30 50 6040 70
10
20
30
40
50
60
70
80
0
0 100
10% THD+N
1% THD+N
V
PVDD
= 24V
POWER-SUPPLY REJECTION RATIO
MAX98400 toc17
FREQUENCY (kHz)
PSRR (dB)
1010.1
-70
-60
-50
-40
-30
-20
-10
0
10
-80
0.01 100
100mV
P-P
RIPPLE
FREQUENCY (kHz)
1
100
CROSSTALK (dB)
100.10.01
CROSSTALK vs. FREQUENCY
MAX98400 toc18
-80
-60
-40
-20
0
8I LOAD,
P
OUT
= 1W,
f = 1kHz
20
-100