Datasheet

MAX9708
20W/40W, Filterless, Spread-Spectrum,
Mono/Stereo, Class D Amplifier
8
Maxim Integrated
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX9708 toc21
FREQUENCY (Hz)
CMRR (dB)
10k1k100
-105
-100
-95
-90
-85
-80
-75
-70
-65
-60
-110
10 100k
INPUT REFERRED
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9708 toc22
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-100
-90
-80
-70
-60
-50
-40
-30
-110
10 100k
CROSSTALK vs. FREQUENCY
MAX9708 toc23
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-110
-100
-90
-80
-70
-60
-50
-40
-120
10 100k
MAXIMUM STEADY-STATE OUTPUT POWER
vs. TEMPERATURE
MAX9708 toc24
AMBIENT TEMPERATURE (°C)
OUTPUT POWER PER CHANNEL (W)
6040
50
5
15
10
25
20
30
35
40
0
30 70
PV
DD
= 18V, 8Ω
STEREO MODE, 1kHz,
FS1 = FS2 = 1
TH0 = TH1 = 1
TH2 = 0
MEASURED WITH THE EV KIT (TQFN
PACKAGE), JUNCTION TEMPERATURE
MAINTAINED AT +110°C
MAXIMUM STEADY-STATE OUTPUT POWER
vs. TEMPERATURE
MAX9708 toc25
AMBIENT TEMPERATURE (°C)
OUTPUT POWER (W)
60
40 50
10
20
40
30
50
60
70
0
30 70
PV
DD
= 18V, 4Ω
MONO MODE, 1kHz,
FS1 = FS2 = 1
TH0 = TH1 = 1
TH2 = 0
MEASURED WITH THE EV KIT (TQFN
PACKAGE), JUNCTION TEMPERATURE
MAINTAINED AT +110°C
Typical Operating Characteristics (continued)
(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.)
Pin Description
PIN NAME FUNCTION
1, 12, 42, 43,
44, 55, 56
N.C. No Connection. Not internally connected.
2, 3, 4,
39, 40,
41, 49, 50
PGND Power Ground
5, 6, 7,
36, 37, 38
PV
DD
Positive Power Supply. Bypass to PGND with a 0.1µF and a 47µF capacitor with the smallest
capacitor placed as close to pins as possible.