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MAX9777/MAX9778
Stereo 3W Audio Power Amplifiers with
Headphone Drive and Input Mux
10
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Typical Operating Characteristics (continued)
(V
DD
= PV
DD
= 5V, GND = PGND = 0V, V
SHDN
= 5V, C
BIAS
= 1µF, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(HEADPHONE MODE)
MAX9777/78 toc40
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.255.004.75
2
4
6
8
10
12
0
4.50 5.50
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
POWER DISSIPATION vs. OUTPUT POWER
(SPEAKER MODE)
MAX9777/78 toc42
OUTPUT POWER (W)
POWER DISSIPATION (W)
1.500.25 0.50 0.75 1.00 1.25
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
0
R
L
= 8Ω
f = 1kHz
EXITING POWER-DOWN
(SPEAKER MODE)
MAX9777/78 toc43
100ms/div
OUT_+ AND OUT_-
1V/div
OUT_+ - OUT_-
1V/div
V
DD
2V/div
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(HEADPHONE MODE)
MAX9777/78 toc40
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.255.004.75
2
4
6
8
10
12
0
4.50 5.50
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C