MAX9708 Datasheet, PDF (5/24 Pages) Maxim Integrated Products – 20W/40W, Filterless, Spread-Spectrum, Mono/Stereo, Class D Amplifier

20W/40W, Filterless, Spread-Spectrum,
Mono/Stereo, Class D Amplifier
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.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
100
PVDD = 18V, 8Ω
STEREO MODE, 1kHz
10
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
100
PVDD = 12V,
STEREO MODE,
f_IN = 1kHz
10
R_L = 8Ω
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
1
PVDD = 18V,
8Ω STEREO MODE,
POUT = 8.3W PER
CHANNEL
1
1
0.1
0.1
0.1
R_L = 4Ω
0.01
0
5 10 15 20 25 30
OUTPUT POWER PER CHANNEL (W)
EFFICIENCY vs. OUTPUT POWER
100
90
80
70
60
50
40
30
20
10
0
PVDD = 18V, 8Ω
STEREO MODE
5 10 15 20 25 30
OUTPUT POWER PER CHANNEL (W)
0.01
0
5
10
15
OUTPUT POWER PER CHANNEL (W)
OUTPUT POWER
vs. SUPPLY VOLTAGE
30
R_L = 8Ω
STEREO MODE
25
20
10% THD+N
15
10
1% THD+N
5
0
10
12
14
16
18
SUPPLY VOLTAGE (V)
0.01
10
100
1k
10k
100k
FREQUENCY (Hz)
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
24
STEREO MODE
22
TA = +85°C ^{TA = +25°C}
20
18
16
TA = -40°C
14
12
10
10 12 14 16 18 20 22
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
4.0
SHDN = 0
3.5
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
100
PVDD = 18V, 4Ω MONO MODE,
1kHz
3.0
10
2.5
2.0
1
1.5
1.0
0.1
0.5
0
10 12 14 16 18 20 22
SUPPLY VOLTAGE (V)
0.01
0
10 20 30 40 50 60
OUTPUT POWER (W)
_______________________________________________________________________________________ 5