Rainbow Electronics MAX9768 - Manual (Page 6)

MAX9768
10W Mono Class D Speaker
Amplifier with Volume Control
6 _______________________________________________________________________________________
Note 1: All devices are 100% production tested at T A = +25°C. All temperature limits are guaranteed by design.
Note 2: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For R L = 8Ω, L = 68µH.
Note 3: Device muted by either asserting MUTE or minimum V OL setting.
Note 4: C b = total capacitance of one bus line in pF.
ELECTRICAL CHARACTERISTICS (continued)
(PV DD = 12V, V DD = 3.3V, GND = PGND = 0V, V SHDN = V DD , V MUTE = 0V; Max volume setting; speaker load resistor connected
between OUT+ and OUT-, R L = ∞, unless otherwise noted. C
BIAS = 2.2µF, C1 = C2 = 0.1µF, C IN = 0.47µF, R IN = 20k Ω, R
F = 30kΩ,
SSM mode. Filterless modulation mode (see the Functional Diagram/Typical Application Circuit). T A = T MIN to T MAX , unless otherwise
noted. Typical values are at T A = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Fall Time of SDA,
Transmitting
t
F
(Note 4)
20 +
0.1Cb
250 ns
Pulse Width of Spike
Suppressed
t SP 0 50 ns
Capacitive Load for Each
Bus Line
C b 400 pF
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9768 toc01
FREQUENCY (Hz)
THD+N (%)
10k 1k 100
0.1
1
10
0.01
10 100k
PV DD = 12V
R L = 8 Ω
FILTERLESS MODULATION
OUTPUT POWER = 6W
OUTPUT POWER = 2W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9768 toc02
FREQUENCY (Hz)
THD+N (%)
10k 1k 100
0.1
1
10
0.01
10 100k
PV DD = 12V
R L = 8 Ω
PWM MODE
OUTPUT POWER = 5W
OUTPUT POWER = 2W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9768 toc03
FREQUENCY (Hz)
THD+N (%)
10k 1k 100
0.1
0.01
1
10
0.001
10 100k
PV DD = 5V
R L = 8 Ω
FILTERLESS MODULATION
OUTPUT POWER = 1W
OUTPUT POWER = 300mW
Typical Operating Characteristics
(PV DD = 12V, V DD = 3.3V = GND = PGND = 0V, V MUTE = 0V; 0dB volume setting; all speaker load resistors connected between
OUT+ and OUT-, R L = 8 Ω, unless otherwise noted. C
BIAS = 2.2µF, C1 = C2 = 0.1µF, C IN = 0.47µF, R IN = 20kΩ, R FB = 30k Ω,
spread-spectrum modulation mode.)