Datasheet
MAX9742
Single-/Dual-Supply, Stereo 16W,
Class D Amplifier with Differential Inputs
_______________________________________________________________________________________
9
EFFICIENCY AND POWER
DISSIPATION vs. OUTPUT POWER
MAX9742 toc26
OUTPUT POWER (W)
EFFICIENCY (%)
10 20 30 40
90
80
70
60
50
40
30
20
10
100
0
POWER DISSIPATION (W)
8
6
4
2
1
9
7
5
3
10
0
050
SYSTEM POWER
DISSIPATION
EFFICIENCY
BTL CONFIGURATION
V
DD
= 24V
R
L
= 8
Ω
f
IN
= 1kHz
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9742 toc27
SUPPLY VOLTAGE (V)
OUTPUT POWER PER CHANNEL (W)
±
14
±
12
15
20
25
30
0
10
5
±
10
±
20
±
18
±
16
DUAL SUPPLY
R
L
= 8
Ω
10% THD+N
1% THD+N
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9742 toc28
SUPPLY VOLTAGE (V)
OUTPUT POWER PER CHANNEL (W)
±
14
±
12
15
20
25
0
10
5
±
10
±
20
±
18
±
16
DUAL SUPPLY
R
L
= 4
Ω
10% THD+N
1% THD+N
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9742 toc29
SUPPLY VOLTAGE (V)
OUTPUT POWER PER CHANNEL (W)
3025
20
25
30
0
15
10
5
20 4035
SINGLE SUPPLY
R
L
= 8
Ω
10% THD+N
1% THD+N
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9742 toc30
SUPPLY VOLTAGE (V)
OUTPUT POWER PER CHANNEL (W)
3025
20
25
30
0
15
10
5
20 4035
SINGLE SUPPLY
R
L
= 4
Ω
10% THD+N
1% THD+N
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9742 toc31
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
2622
40
45
0
30
20
10
35
25
15
5
20 302824
BTL CONFIGURATION
R
L
= 8
Ω
10% THD+N
1% THD+N
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9742 toc32
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
±16±12
15
20
-20
5
-5
-15
10
0
-10
±10 ±20±18±14
DUAL SUPPLY
OUTPUT FILTER REMOVED
NO LOAD CONNECTED
V
DD
= |V
SS
|
I
SS
I
DD
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9742 toc33
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
3525
17
18
12
15
13
16
14
20 4030
SINGLE SUPPLY
OUTPUT FILTER REMOVED
INPUTS GROUNDED
NO LOAD CONNECTED
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9742 toc34
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
±14
0
10
-60
-20
-40
-10
-30
-50
±10 ±22±18 ±20±12 ±16
DUAL SUPPLY
V
DD
= |V
SS
|
OUTPUT FILTER REMOVED
INPUTS GROUNDED
NO LOAD CONNECTED
I
SS
I
DD
Typical Operating Characteristics (continued)
(24V single-supply mode, ±15V dual-supply mode, both channels driven in phase, THD+N measurement bandwidth = 22Hz to
22kHz, T
A
= +25°C, unless otherwise noted. See Figure 1 for test circuits, see
Typical Application Circuits/Functional Diagrams
for
test circuit component values.)