Datasheet

MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
8 _______________________________________________________________________________________
OUTPUT POWER vs. SUPPLY VOLTAGE
(MAX9791 SPEAKER MODE)
MAX9791 toc10b
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
2.5
3.0
0
2.5 5.5
f = 1kHz
R
LOAD
= 4
Ω
THD+N = 10%
THD+N = 1%
OUTPUT POWER vs. SUPPLY VOLTAGE
(MAX9791 SPEAKER MODE)
MAX9791 toc10c
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
0
2.5 5.5
f = 1kHz
R
LOAD
= 8
Ω
THD+N = 10%
THD+N = 1%
OUTPUT POWER vs. SUPPLY VOLTAGE
(MAX9792 SPEAKER MODE)
MAX9791 toc10d
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
2.5
0
2.5 5.5
f = 1kHz
R
LOAD
= 8
Ω
THD+N = 10%
THD+N = 1%
OUTPUT POWER vs. SUPPLY VOLTAGE
(MAX9792 SPEAKER MODE)
MAX9791 toc10e
SUPPLY VOLTAGE
OUTPUT POWER (W)
5.04.54.03.53.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
2.5 5.5
f = 1kHz
R
LOAD
= 3
Ω
THD+N = 10%
THD+N = 1%
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (SPEAKER MODE)
MAX9791 toc11
FREQUENCY (kHz)
PSRR (dB)
1
-30
-20
-10
-80
-90
-70
-60
-50
-40
-100
0.01 100
LEFT
RIGHT
0.1 10
0
V
RIPPLE
= 200mV
P-P
R
L
= 8
Ω
CROSSTALK vs. FREQUENCY
(SPEAKER MODE)
MAX9791 toc12
FREQUENCY (kHz)
CROSSTALK (dB)
1
-30
-20
-10
-80
-90
-100
-70
-60
-50
-40
-110
0.01 100
RIGHT TO LEFT
LEFT TO RIGHT
0.1 10
0
FS = 1V
RMS
V
IN
= -20dBFS
R
L
= 8
Ω
Typical Operating Characteristics (continued)
(V
AVDD
= V
PVDD
= V
HPVDD
= 5V, V
GND
= V
PGND
= V
CPGND
= 0, I
LDO_OUT
= 0, C
LDO
= 2 x 1µF, C1 = C2 = 1µF. R
L
= ∞, unless oth-
erwise specified. R
IN1
= 20kΩ (A
VSPKR
= 12dB), R
IN2
= 40.2kΩ (A
VHP
= 0dB), C
IN1
= 470nF, C
IN2
= C
COM
= 1µF, measurement BW
= 20kHz AES17, T
A
= +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1,
HP_EN = 1.)
SPEAKER