MAX9768 Maxim Integrated Products, MAX9768 Datasheet - Page 8

• 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.)
8
100
DD
12
10
90
80
70
60
50
40
30
20
10
95
92
89
86
83
80
_______________________________________________________________________________________
8
6
4
2
0
0
4.5
0
0
OUTPUT POWER vs. LOAD RESISTANCE
= 12V, V
f
R
PWM MODULATION
IN
L
EFFICIENCY vs. SUPPLY VOLTAGE
= 1kHz
= 8Ω
EFFICIENCY vs. OUTPUT POWER
5
6.5
2
THD+N = 1%
FILTERLESS MODULATION
LOAD RESISTANCE (Ω)
DD
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
10
THD+N = 1%
THD+N = 10%
THD+N = 10%
8.5
= 3.3V = GND = PGND = 0V, V
4
L
PWM MODE
= 8Ω, unless otherwise noted. C
15
10.5
6
20
PV
f = 1kHz
PWM MODE
PV
f
R
IN
12.5
L
DD
8
DD
= 1kHz
= 8Ω
25
= 12V
= 12V
14.5
30
10
100
3.5
3.0
2.5
2.0
1.5
1.0
0.5
Typical Operating Characteristics (continued)
90
80
70
60
50
40
30
20
10
14
12
10
0
0
8
6
4
2
0
0
0
4
OUTPUT POWER vs. LOAD RESISTANCE
OUTPUT POWER vs. SUPPLY VOLTAGE
MUTE
R
f
PWM MODE
IN
L
EFFICIENCY vs. OUTPUT POWER
= 8Ω
= 1kHz
BIAS
5
6
= 0V; 0dB volume setting; all speaker load resistors connected between
0.5
FILTERLESS MODULATION
LOAD RESISTANCE (Ω)
= 2.2µF, C1 = C2 = 0.1µF, C
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
10
THD+N = 10%
THD+N = 10%
8
PWM MODE
1.0
15
THD+N = 1%
10
THD+N = 1%
20
1.5
PV
f = 1kHz
PWM MODE
PV
f
R
IN
L
DD
12
DD
= 1kHz
= 8Ω
25
= 5V
= 5V
2.0
30
14
IN
95
92
89
86
83
80
12
10
90
80
70
60
50
40
30
20
10
8
6
4
2
0
0
= 0.47µF, R
CASE TEMPERATURE vs. OUTPUT POWER
4.5
4
0
OUTPUT POWER vs. SUPPLY VOLTAGE
R
f
PWM MODE
f
R
FILTERLESS MODULATION
f
R
IN
IN
IN
L
L
L
EFFICIENCY vs. SUPPLY VOLTAGE
= 4Ω
= 1kHz
THD+N = 10%
= 1kHz
= 8Ω
= 1kHz
= 8Ω
2
6.5
6
PV
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
IN
DD
4
THD+N = 1%
THD+N = 10%
8.5
8
= 14V
= 20kΩ, R
THD+N = 1%
6
10.5
PV
10
DD
8
= 12V
FB
12.5
12
10
= 30kΩ,
14.5
14
12