max9791 Maxim Integrated Products, Inc., max9791 Datasheet - Page 7

• Manufacturer Part Number: max9791
• Description: Windows Vista-compliant Class D Speaker Amplifiers With Directdrive Headphone Amplifiers
• Manufacturer: Maxim Integrated Products, Inc.

(V
erwise specified. R
= 20kHz AES17, T
HP_EN = 1.)
Amplifiers with DirectDrive Headphone Amplifiers
AVDD
100
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
90
80
70
60
50
40
30
20
10
0
0
1
0
OUTPUT POWER vs. LOAD RESISTANCE
= V
EFFICIENCY vs. OUTPUT POWER
PVDD
(MAX9792 SPEAKER MODE)
(MAX9791 SPEAKER MODE)
0.3
LOAD RESISTANCE (Ω)
0.6
OUTPUT POWER (W)
= V
A
IN1
Windows Vista-Compliant Class D Speaker
= +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1,
_______________________________________________________________________________________
HPVDD
THD+N = 10%
= 20kΩ (A
0.9
10
THD+N = 1%
f = 1kHz
R
= 5V, V
L
1.2
R
f
= 8Ω
IN
L
= 4Ω
= 1kHz
VSPKR
1.5
GND
100
1.8
= 12dB), R
= V
PGND
-100
-10
-20
-30
-40
-50
-60
-70
-80
-90
Typical Operating Characteristics (continued)
3.0
2.5
2.0
1.5
1.0
0.5
= V
0
0
IN2
0.01
1
OUTPUT POWER vs. LOAD RESISTANCE
CPGND
V
R
POWER-SUPPLY REJECTION RATIO
= 40.2kΩ (A
vs. FREQUENCY (SPEAKER MODE)
RIPPLE
L
= 8Ω
(MAX9791 SPEAKER MODE)
= 200mV
0.1
SPEAKER
= 0, I
LOAD RESISTANCE (Ω)
FREQUENCY (kHz)
P-P
LDO_OUT
VHP
10
1
THD+N = 10%
LEFT
= 0dB), C
f = 1kHz
THD+N = 1%
= 0, C
10
RIGHT
IN1
LDO
100
100
= 470nF, C
= 2 x 1µF, C1 = C2 = 1µF. R
-100
-110
110
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
90
80
70
60
50
40
30
20
10
0
0
IN2
0.01
0
FS = 1V
V
R
= C
IN
L
EFFICIENCY vs. OUTPUT POWER
0.5
= 8Ω
= -20dBFS
CROSSTALK vs. FREQUENCY
(MAX9792 SPEAKER MODE)
COM
RMS
0.1
1.0
(SPEAKER MODE)
OUTPUT POWER (W)
FREQUENCY (kHz)
= 1µF, measurement BW
1.5
RIGHT TO LEFT
2.0
1
L
= ∞, unless oth-
2.5
R
L
LEFT TO RIGHT
R
f
= 8Ω
IN
L
= 3Ω
= 1kHz
3.0
10
3.5
100
4.0
7