Maxim MAX9777 Manual page 9

Stereo 3W Audio Power Amplifiers with
(V = PV = 5V, GND = PGND = 0V, V
DD DD
POWER DISSIPATION vs. OUTPUT POWER
(HEADPHONE MODE)
120
100
80
60
40
20
0
0 50 100
OUTPUT POWER (mW)
CROSSTALK vs. FREQUENCY
(HEADPHONE MODE)
-40
V = 200mV
IN P-P
R = 16Ω
-50
L
-60
-70
-80
RIGHT TO LEFT
-90
-100
-110
LEFT TO RIGHT
-120
10 100
ENTERING SHUTDOWN (HEADPHONE MODE)
SHDN
2V/div
OUT_+
1V/div
HP JACK
100mV/div
_______________________________________________________________________________________
Headphone Drive and Input Mux
Typical Operating Characteristics (continued)
SHDN = 5V, C
BIAS
POWER DISSIPATION vs. OUTPUT POWER
70
60
50
40
30
20
10
R = 16Ω
L
f = 1kHz
0
0 20
150 200
1k 10k 100k
FREQUENCY (Hz)
MAX9777/78 toc38
100ms/div
= 1µF, T = +25°C, unless otherwise noted.)
A
(HEADPHONE MODE)
R = 32Ω
L
f = 1kHz
40 60 80 100
OUTPUT POWER (mW)
EXITING SHUTDOWN (HEADPHONE MODE)
SHDN
2V/div
OUT_+
1V/div
HP JACK
200mV/div
R = 16Ω
L
INPUT AC-COUPLED TO GND
SUPPLY CURRENT vs. SUPPLY VOLTAGE
25
20
15
10
5
0
4.50
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (HEADPHONE MODE)
40
V = 200mV
RIPPLE P-P
50
60
70
80
90
100
10 100 1k
FREQUENCY (Hz)
MAX9777/78 toc37
100ms/div
(SPEAKER MODE)
T = +85°C
A
T = +25°C
A
T = -40°C
A
4.75 5.00 5.25 5.50
SUPPLY VOLTAGE (V)
10k 100k
9