max9742 Maxim Integrated Products, Inc., max9742 Datasheet - Page 8

• Manufacturer Part Number: max9742
• Description: Max9742 Single-/dual-supply, Stereo 16w, Class D Amplifier With Differential Inputs
• Manufacturer: Maxim Integrated Products, Inc.

Single-/Dual-Supply, Stereo 16W,
Class D Amplifier with Differential Inputs
(24V single-supply mode, ±15V dual-supply mode, both channels driven in phase, THD+N measurement bandwidth = 22Hz to
22kHz, T
test circuit component values.)
8
_______________________________________________________________________________________
0.01
0.1
10
1
100
A
SINGLE SUPPLY
V
R
P
= +25°C, unless otherwise noted. See Figure 1 for test circuits, see Typical Application Circuits/Functional Diagrams for
DD
L
OUT
TOTAL HARMONIC DISTORTION
= 8Ω
= 24V
PLUS NOISE vs. FREQUENCY
= 50mW
1k
FREQUENCY (Hz)
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0
0
DISSIPATION vs. OUTPUT POWER
DISSIPATION vs. OUTPUT POWER
OUTPUT POWER PER CHANNEL (W)
OUTPUT POWER PER CHANNEL (W)
10k
EFFICIENCY AND POWER
EFFICIENCY AND POWER
SYSTEM POWER
DISSIPATION
EFFICIENCY
EFFICIENCY
5
5
SYSTEM POWER
DISSIPATION
100k
SINGLE SUPPLY
V
R
f
SINGLE SUPPLY
V
R
f
10
10
IN
IN
DD
L
DD
L
= 8Ω
= 1kHz
= 8Ω
= 1kHz
= 24V
= 30V
Typical Operating Characteristics (continued)
0.01
MAX9742 toc22
MAX9742 toc24
0.1
10
1
100
SINGLE SUPPLY
V
R
P
15
15
DD
L
OUT
TOTAL HARMONIC DISTORTION
= 4Ω
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
2.5
2.0
1.5
1.0
0.5
0
PLUS NOISE vs. FREQUENCY
= 24V
= 50mW
1k
FREQUENCY (Hz)
10k
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0
0
100k
DISSIPATION vs. OUTPUT POWER
DISSIPATION vs. OUTPUT POWER
OUTPUT POWER PER CHANNEL (W)
OUTPUT POWER PER CHANNEL (W)
EFFICIENCY AND POWER
EFFICIENCY AND POWER
5
EFFICIENCY
5
OUTPUT POWER WITH AND WITHOUT T-NETWORK
EFFICIENCY
SYSTEM POWER
DISSIPATION
TOTAL HARMONIC DISTORTION PLUS NOISE vs.
0.01
100
0.1
10
1
10
0.001
10
SINGLE SUPPLY
V
R
f = 1kHz
DD
L
= 8Ω
= 24V
15
OUTPUT POWER PER CHANNEL (W)
SYSTEM POWER
DISSIPATION
0.01
WITHOUT T-NETWORK
SINGLE SUPPLY
V
R
f
IN
DUAL SUPPLY
R
f
DD
L
IN
L
= 4Ω
= 1kHz
15
= 8Ω
= 1kHz
= 24V
WITH T-NETWORK
20
MAX9742 toc23
MAX9742 toc25
0.1
20
25
1
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
9
8
7
6
5
4
3
2
1
0
10
100