max9744 Maxim Integrated Products, Inc., max9744 Datasheet - Page 3

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

ELECTRICAL CHARACTERISTICS (continued)
(PVDD = 12V, V
OUT_+ and OUT_-, R
spectrum mode, filterless modulation mode, see the Functional Diagrams/Typical Application Circuits. T
erwise noted. Typical values are at T
Efficiency (Note 3)
Output Power
Hard Output Current Limit
Total Harmonic Distortion Plus
Noise
Signal-to-Noise Ratio
PARAMETER
DD
= 3.3V, GND = PGND = 0V, V
_______________________________________________________________________________________
L
= ∞, unless otherwise stated, C
20W Stereo Class D Speaker Amplifier
A
SYMBOL
= +25°C.) (Note 1)
THD+N
P
SNR
I
OUT
SC
η
Filterless
modulation
PWM
V
f
V
f
V
f
f = 1kHz, R
8Ω, P
f
P
R
filterless
modulation
mode, BW =
22Hz to 22kHz
P
R
mode, BW =
22Hz to 22kHz
IN
IN
IN
IN
MUTE
PVDD
PVDD
PVDD
OUT
OUT
L
L
= 1kHz
= 1kHz
= 1kHz
= 1kHz
= 8Ω,
= 8Ω, PWM
BOOT_
OUT
= 10W,
= 10W,
= 5V,
= 12V,
= 14V,
= 0V; max volume setting; all speaker load resistors connected between
= 5W,
= 0.1µF, C
L
=
CONDITIONS
P
8Ω load
P
4Ω load
P
8Ω load
P
4Ω load
R
R
R
R
R
R
R
R
R
R
R
R
OUT
OUT
OUT
OUT
L
L
L
L
L
L
L
L
L
L
L
L
Filterless modulation
PWM
Fixed-frequency
modulation, unweighted
Spread-spectrum,
unweighted
Fixed-frequency
modulation, A-weighted
Spread-spectrum,
A-weighted
Fixed-frequency
modulation, unweighted
Spread-spectrum,
unweighted
Fixed-frequency
modulation, A-weighted
Spread-spectrum,
A-weighted
= 8Ω, THD+N = 1%
= 8Ω, THD+N = 10%
= 4Ω, THD+N = 1%
= 4Ω, THD+N = 10%
= 8Ω, THD+N = 1%
= 8Ω, THD+N = 10%
= 4Ω, THD+N = 1%
= 4Ω, THD+N = 10%
= 8Ω, THD+N = 1%
= 8Ω, THD+N = 10%
= 4Ω, THD+N = 1%
= 4Ω, THD+N = 10%
BIAS
= 10W, f
= 15W, f
= 10W, f
= 15W, f
with Volume Control
= 2.2µF, C
IN
IN
IN
IN
= 1kHz,
= 1kHz,
= 1kHz,
= 1kHz,
IN
= 0.47µF, R
MIN
3.9
IN
A
= 20kΩ, R
= T
TYP
17.5
22.5
0.04
0.04
1.4
1.8
2.6
3.6
5.5
93
87
92
88
10
14
17
10
13
91
90
94
94
91
81
94
89
8
MIN
to T
F_
MAX
= 20kΩ, spread-
MAX
, unless oth-
UNITS
dB
dB
%
%
W
%
A
3