MAX9768 Maxim Integrated Products, MAX9768 Datasheet - Page 10

• Manufacturer Part Number: MAX9768
• Description: 10W Mono Class D Speaker Amplifier
• Manufacturer: Maxim Integrated Products

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10W Mono Class D Speaker
Amplifier with Volume Control
(PV
OUT+ and OUT-, R
spread-spectrum modulation mode.)
10
-100
DD
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
______________________________________________________________________________________
(SPREAD-SPECTRUM MODULATION MODE)
= 12V, V
1
WIDEBAND OUTPUT SPECTRUM
DD
10
FREQUENCY (MHz)
= 3.3V = GND = PGND = 0V, V
-100
-120
L
-20
-40
-60
-80
15
13
11
20
9
7
5
= 8Ω, unless otherwise noted. C
0
2.6
0
RBW = 10kHz
INPUT AC GROUNDED
PWM MODE
vs. VOLUME CONTROL VOLTAGE
100
0.5
2.8
VOLUME CONTROL LEVEL
SUPPLY CURRENT (V
vs. SUPPLY VOLTAGE
PWM MODE
1.0
SUPPLY VOLTAGE (V)
FILTERLESS MODULATION
3.0
1.5
V
1000
VOL
(V)
2.0
3.2
2.5
Typical Operating Characteristics (continued)
DD
3.4
)
3.0
MUTE
TURN-ON/OFF RESPONSE
BIAS
3.6
3.5
(MAX9768)
= 0V; 0dB volume setting; all speaker load resistors connected between
100ms/div
= 2.2µF, C1 = C2 = 0.1µF, C
MAX9768 toc32
0.50
0.45
0.40
0.35
0.30
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
4
4
SHDN
2V/div
OUT
500mA/div
SHUTDOWN CURRENT = I
V
DD
R
L
= 3.3V
= ∞
SUPPLY CURRENT (PV
6
6
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
vs. SUPPLY VOLTAGE
PWM MODE
FILTERLESS MODULATION
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
IN
8
8
= 0.47µF, R
PVDD
10
10
+ I
TURN-ON/OFF RESPONSE
DD
DD
12
12
)
(MAX9768B)
IN
40ms/div
= 20kΩ, R
14
14
FB
MAX9768 toc33
= 30kΩ,
SHDN
2V/div
OUT
500mA/div