Datasheet

TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9708 toc01
OUTPUT POWER PER CHANNEL (W)
THD+N (%)
252015105
0.1
1
10
100
0.01
030
PV
DD
= 18V, 8Ω
STEREO MODE, 1kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9708 toc02
OUTPUT POWER PER CHANNEL (W)
THD+N (%)
105
0.1
1
10
100
0.01
015
PV
DD
= 12V,
STEREO MODE,
f
IN
= 1kHz
R
L
= 8Ω
R
L
= 4Ω
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAX9708 toc03
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.1
10 100k
1
0.01
PV
DD
= 18V,
8Ω STEREO MODE,
P
OUT
= 8.3W PER
CHANNEL
EFFICIENCY vs. OUTPUT POWER
MAX9708 toc04
OUTPUT POWER PER CHANNEL (W)
EFFICIENCY (%)
252015105
20
30
40
50
60
70
80
90
100
10
030
PV
DD
= 18V, 8Ω
STEREO MODE
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9708 toc05
SUPPLY VOLTAGE (V)
OUTPUT POWER PER CHANNEL (W)
161412
5
10
15
20
25
30
0
10 18
R
L
= 8Ω
STEREO MODE
10% THD+N
1% THD+N
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9708 toc06
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
2018161412
12
14
16
18
20
22
24
10
10 22
STEREO MODE
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
Typical Operating Characteristics
(PV
DD
= V
DD
= +18V, PGND = GND = 0V, C
SS
= 0.47µF, C
REG
= 0.01µF, C1 = 0.1µF, C2 = 1µF, R
LOAD
= ∞, SHDN = high, MONO
= low, MUTE = high, G1 = low, G2 = high, FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (R
L
) are between OUT_+ and
OUT_-, T
A
= +25°C, unless otherwise stated.)
MAX9708
20W/40W, Filterless, Spread-Spectrum,
Mono/Stereo, Class D Amplifier
5
Maxim Integrated
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9708 toc07
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
201812 14 16
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
10 22
SHDN = 0
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9708 toc08
OUTPUT POWER (W)
THD+N (%)
5040302010
0.1
1
10
100
0.01
060
PV
DD
= 18V, 4Ω MONO MODE,
1kHz