MAX9768_08 Datasheet, PDF (10/26 Pages) Maxim Integrated Products – 10W Mono Class D Speaker Amplifier with Volume Control

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