Datasheet
MAX9741
12W+12W, Low-EMI, Spread-Spectrum,
Stereo, Class D Amplifier
6 _______________________________________________________________________________________
15
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
WITH FERRITE BEAD FILTER
MAX9741 toc19
OUTPUT POWER (W)
THD+N (%)
0.01
0.1
1
10
0
R
L
= 4Ω
105
V
DD
= 18V
V
DD
= 12V
V
DD
= 24V
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9741 toc20
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
22191613
10
5
15
20
25
30
35
0
10 25
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9741 toc21
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
18161412
0.10
0.05
0.15
0.20
0.25
0.30
0.35
0
10 20
Typical Operating Characteristics (continued)
(V
DD
= 18V, R
L
= 8Ω, f
IN
= 1kHz, 33µH with 4Ω, 68µH with 8Ω, part in SSM mode, 136µH with 16Ω, measurement BW = 22Hz to
22kHz, unless otherwise noted.)
100k 1M 10M 100M
WIDEBAND OUTPUT SPECTRUM
(SSM MODE)
MAX9741 toc16
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dBV)
0
-120
-100
-80
-60
-40
-20
RBW = 10kHz
TURN-ON/TURN-OFF RESPONSE
MAX9741 toc17
20ms/div
OUTPUT
1V/div
SHDN
5V/div
f = 1kHz
C
SS
= 180pF
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
WITH FERRITE BEAD FILTER
MAX9741 toc18
OUTPUT POWER (W)
THD+N (%)
15105
0.1
1
10
0.01
020
R
L
= 8Ω
V
DD
= 18V
V
DD
= 12V
V
DD
= 24V