max9744 Maxim Integrated Products, Inc., max9744 Datasheet - Page 7

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

(V
OUT_+ and OUT_- with an inductor in series, 8Ω load, L = 68µH, 4Ω load, L= 33µH. R
C
IN
PVDD
0.001
0.001
0.01
0.01
100
100
0.1
0.1
= 0.47µF, R
10
10
1
1
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
10
0
= 12V, V
PVDD = 12V
R
f
PWM MODE
PVDD = 12V
R
FILTERLESS MODULATION
IN
L
L
= 4Ω
= 1kHz
= 8Ω
OUTPUT POWER = 6W
SSM
4
OUTPUT POWER = 3W
100
0.001
IN
vs. OUTPUT POWER
0.01
100
DD
0.1
10
OUTPUT POWER (W)
vs. FREQUENCY
1
= 20kΩ, R
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION PLUS NOISE
10
= 3.3V, V
8
_______________________________________________________________________________________
FFM
PVDD = 5V
R
PWM MODE
OUTPUT POWER = 500mW
L
= 4Ω
1k
20W Stereo Class D Speaker Amplifier
12
100
F_
GND
vs. FREQUENCY
OUTPUT POWER = 1.5W
FREQUENCY (Hz)
10k
= 20kΩ, spread-spectrum mode, T
16
= V
1k
PGND
100k
20
10k
= 0V, V
0.001
0.001
Typical Operating Characteristics (continued)
0.01
0.01
100
100
0.1
0.1
10
10
1
1
MUTE
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
100k
10
10
PVDD = 12V
R
FILTERLESS MODULATION
PVDD = 12V
R
PWM MODE
L
L
= 4Ω
= 8Ω
= 0V; max volume setting; all speaker load resistors connected between
OUTPUT POWER = 6W
OUTPUT POWER = 10W
100
100
OUTPUT POWER = 3W
vs. FREQUENCY
OUTPUT POWER = 5W
vs. FREQUENCY
FREQUENCY (Hz)
FREQUENCY (Hz)
A
= +25°C, unless otherwise noted.)
1k
1k
with Volume Control
10k
10k
0.001
0.01
100
0.1
10
1
TOTAL HARMONIC DISTORTION PLUS NOISE
100k
100k
10
L
PVDD = 12V
R
FILTERLESS MODULATION
P
= ∞, unless otherwise stated, C
L
OUT
= 4Ω
= 5W
0.001
0.001
100
0.01
0.01
100
100
0.1
0.1
10
10
1
1
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
FREQUENCY (Hz)
10
10
PVDD = 12V
R
PWM MODE
PVDD = 5V
R
FILTERLESS MODULATION
SSM
L
L
OUTPUT POWER = 1.5W
= 4Ω
OUTPUT POWER = 10W
= 4Ω
1k
FFM
100
100
OUTPUT POWER = 5W
vs. FREQUENCY
vs. FREQUENCY
FREQUENCY (Hz)
FREQUENCY (Hz)
OUTPUT POWER = 500mW
10k
1k
1k
100k
BIAS
10k
10k
= 2.2µF,
100k
100k
7