MAX9791AETI+T Maxim Integrated Products, MAX9791AETI+T Datasheet - Page 7

• Manufacturer Part Number: MAX9791AETI+T
• Description: IC AMP AUDIO 2.2W STER D 28TQFN
• Manufacturer: Maxim Integrated Products
• Series: DirectDrive™r
• Type: Class Dr

Specifications of MAX9791AETI+T

• Output Type: 2-Channel (Stereo) with Stereo Headphones and Subwoofer
• Max Output Power X Channels @ Load: 2.2W x 2 @ 4 Ohm; 180mW x 2 @ 32 Ohm
• Voltage - Supply: 4.5 V ~ 5.5 V
• Features: Depop, LDO, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(V
erwise specified. R
= 20kHz AES17, T
HP_EN = 1.)
Amplifiers with DirectDrive Headphone Amplifiers
AVDD
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
= V
OUTPUT POWER vs. LOAD RESISTANCE
EFFICIENCY vs. OUTPUT POWER
PVDD
R
(MAX9791 SPEAKER MODE)
(MAX9792 SPEAKER MODE)
L
0.3
= 8Ω
LOAD RESISTANCE (Ω)
= V
OUTPUT POWER (W)
A
IN1
Windows Vista-Compliant Class D Speaker
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
= +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1,
0.6
_______________________________________________________________________________________
HPVDD
0
= 20kΩ (A
1
OUTPUT POWER vs. LOAD RESISTANCE
10
R
THD+N = 10%
L
V
f
IN
= 3Ω
PVDD
0.9
= 1kHz
= 5V, V
f = 1kHz
(MAX9792 SPEAKER MODE)
THD+N = 1%
= V
AVDD
LOAD RESISTANCE (Ω)
VSPKR
1.2
GND
= 3.7V
THD+N = 10%
10
= 12dB), R
100
= V
1.5
THD+N = 1%
PGND
f = 1kHz
Typical Operating Characteristics (continued)
1.50
1.25
1.00
0.75
0.50
0.25
100
= V
90
80
70
60
50
40
30
20
10
IN2
0
0
1
0
CPGND
OUTPUT POWER vs. LOAD RESISTANCE
= 40.2kΩ (A
100
EFFICIENCY vs. OUTPUT POWER
0.3
(MAX9791 SPEAKER MODE)
(MAX9791 SPEAKER MODE)
SPEAKER
= 0, I
LOAD RESISTANCE (Ω)
OUTPUT POWER (W)
0.6
THD+N = 1%
LDO_OUT
VHP
0.9
10
V
= 0dB), C
PVDD
THD+N = 10%
R
L
1.2
f
R
= 8Ω
= 0, C
= V
IN
L
2.5
2.0
1.5
1.0
0.5
= 4Ω
= 1kHz
AVDD
0
1
1.5
OUTPUT POWER vs. LOAD RESISTANCE
IN1
= 3.7V
LDO
= 470nF, C
(MAX9792 SPEAKER MODE)
100
1.8
= 2 x 1µF, C1 = C2 = 1µF. R
LOAD RESISTANCE (Ω)
THD+N = 1%
110
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
IN2
10
0
0
V
THD+N = 10%
0
0
PVDD
= C
EFFICIENCY vs. OUTPUT POWER
EFFICIENCY vs. OUTPUT POWER
0.5
= V
COM
(MAX9792 SPEAKER MODE)
(MAX9791 SPEAKER MODE)
R
0.2
AVDD
L
= 8Ω
1.0
= 3.7V
OUTPUT POWER (W)
OUTPUT POWER (W)
= 1µF, measurement BW
1.5
0.4
100
2.0
L
R
V
f
L
IN
= ∞, unless oth-
PVDD
= 4Ω
0.6
= 1kHz
2.5
R
L
f
R
= V
= 8Ω
IN
L
= 3Ω
= 1kHz
3.0
AVDD
0.8
= 3.7V
3.5
4.0
1.0
7