max9744 Maxim Integrated Products, Inc., max9744 Datasheet - Page 6

• Manufacturer Part Number: max9744
• Description: 20w Stereo Class D Speaker Amplifier With Volume Control
• Manufacturer: Maxim Integrated Products, Inc.

20W Stereo Class D Speaker Amplifier
with Volume Control
(V
OUT_+ and OUT_- with an inductor in series, 8Ω load, L = 68µH, 4Ω load, L= 33µH. R
C
6
IN
PVDD
0.001
0.001
0.01
0.01
100
100
_______________________________________________________________________________________
= 0.47µF, R
0.1
0.1
10
10
1
1
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
0
0
= 12V, V
PVDD = 12V
R
PWM MODE
PVDD = 12V
R
FILTERLESS MODULATION
L
L
= 8Ω
= 4Ω
2
f
IN
4
0.001
= 100Hz
0.01
f
3
IN
100
vs. OUTPUT POWER
f
IN
vs. OUTPUT POWER
0.1
DD
IN
10
f
6
OUTPUT POWER (W)
IN
OUTPUT POWER (W)
1
= 100Hz
TOTAL HARMONIC DISTORTION PLUS NOISE
= 6kHz
= 20kΩ, R
= 6kHz
0
= 3.3V, V
8
PVDD = 12V
R
f
FILTERLESS MODULATION
IN
L
= 4Ω
= 1kHz
10
6
f
f
IN
4
IN
12
= 1kHz
= 1kHz
vs. OUTPUT POWER
F_
GND
OUTPUT POWER (W)
14
= 20kΩ, spread-spectrum mode, T
9
FFM
8
16
= V
18
PGND
12
20
12
SSM
= 0V, V
16
0.001
0.001
0.01
0.01
100
100
0.1
0.1
10
10
1
1
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
MUTE
20
0
0
PVDD = 5V
R
FILTERLESS MODULATION
PVDD = 12V
R
PWM MODE
L
L
= 4Ω
= 4Ω
f
IN
= 0V; max volume setting; all speaker load resistors connected between
= 100Hz
4
f
f
IN
IN
1
vs. OUTPUT POWER
= 100Hz
vs. OUTPUT POWER
= 6kHz
f
OUTPUT POWER (W)
IN
OUTPUT POWER (W)
= 6kHz
8
A
= +25°C, unless otherwise noted.)
2
f
IN
Typical Operating Characteristics
= 1kHz
f
12
IN
= 1kHz
3
16
0.001
0.01
100
0.1
10
1
TOTAL HARMONIC DISTORTION PLUS NOISE
20
4
0
L
PVDD = 12V
R
f
FILTERLESS MODULATION
IN
L
= ∞, unless otherwise stated, C
= 8Ω
= 1kHz
2
0.001
0.001
0.01
0.01
100
100
vs. OUTPUT POWER
0.1
0.1
10
10
OUTPUT POWER (W)
1
1
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
4
0
0
FFM
PVDD = 12V
R
FILTERLESS MODULATION
PVDD = 5V
R
PWM MODE
L
L
= 8Ω
= 4Ω
6
SSM
3
1
vs. OUTPUT POWER
vs. OUTPUT POWER
f
f
IN
IN
f
f
8
IN
OUTPUT POWER (W)
IN
OUTPUT POWER (W)
= 100Hz
= 100Hz
= 6kHz
= 6kHz
10
6
2
f
f
IN
IN
12
= 1kHz
= 1kHz
BIAS
9
3
= 2.2µF,
12
4