Datasheet

MAX9741
12W+12W, Low-EMI, Spread-Spectrum,
Stereo, Class D Amplifier
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 18V, GND = PGND = 0V, SHDN V
IH
, A
V
= 16dB, C
SS
= C
IN
= 0.47µF, C
REG
= 0.01µF, C1 = 100nF, C2 = 1µF, FS1 = FS2 =
GND (f
S
= 670kHz), R
L
connected between OUTL+ and OUTL- and OUTR+ and OUTR-, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
R
L
= 8 12
V
DD
= 18V, THD+N =
10%, f = 1kHz
R
L
= 4 6.5
R
L
= 8 11
V
DD
= 24V, THD+N =
10%, f = 1kHz
R
L
= 4 5
R
L
= 8 8
Continuous Output Power
(Notes 4, 5)
P
CONT
V
DD
= 12V, THD+N =
10%, f = 1kHz
R
L
= 4 8.5
W
Total Harmonic Distortion Plus
Noise
THD+N
f
IN
= 1kHz, either FFM or SSM, R
L
= 8,
P
OUT
= 4W
0.1 %
FFM
95.8
Unweighted
SSM
91.8
FFM
99.1
Signal-to-Noise Ratio SNR
R
L
= 8,
P
OUT
= 4W,
f = 1kHz
BW = 22Hz to 22kHz
A-weighted
SSM
95.7
dB
Crosstalk Left to right, right to left, 8 load, f
IN
= 10kHz 65 dB
FS1 = L, FS2 = L 560 670 800
FS1 = L, FS2 = H 930
FS1 = H, FS2 = L 470
Oscillator Frequency f
OSC
FS1 = H, FS2 = H (spread-spectrum mode)
670
±7%
kHz
V
DD
= 12V, R
L
= 8, P
OUT
= 8W 78
Efficiency (Note 4) η
V
DD
= 18V, R
L
= 8, P
OUT
= 10W 78
%
Regulator Output V
REG
6V
DIGITAL INPUTS (SHDN, FS_, G_)
V
IH
2.5
Input Thresholds
V
IL
0.8
V
Input Leakage Current ±A
Note 2: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 3: PSRR is specified with the amplifier inputs connected to GND through C
IN
.
Note 4: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For R
L
= 8, L = 68µH.
For R
L
= 12, L = 100µH. For R
L
= 16, L = 120µH.
Note 5: Output power measured at T
A
= +25°C, with a soak time of 15 minutes.