Datasheet

MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
14 ______________________________________________________________________________________
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX9791 toc42
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
4.75 5.00
0
5
10
15
20
-5
4.50 5.505.25
LDO_EN = 1, V
LDO
= 3.3V OR 4.75V
SPKR_EN = 1
HP_EN = 0
SPKR_EN = 0
HP_EN = 1
SPKR_EN = 0
HP_EN = 0
SPKR_EN = 1
HP_EN = 1
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX9791 toc42a
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.04.54.03.53.0
0
5
10
15
20
-5
2.5 5.5
LDO_EN = 1
V
LDO_OUT
= 1.8V
SPKR_EN = 1
SPKR_EN = 1
SPKR_EN = 0
SPKR_EN = 0
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE
MAX9791 toc43
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (µA)
5.04.53.0 3.5 4.0
1
2
3
4
5
6
7
8
0
2.5 5.5
SPKR_EN = 1
HP_EN = 0
LDO_EN = 0
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.)
GENERAL